Articles | Volume 3, issue 1
https://doi.org/10.5194/ms-3-5-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/ms-3-5-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
18 Jan 2012
Research article |
| 18 Jan 2012
Modeling of a compliant joint in a Magnetic Levitation System for an endoscopic camera
M. Simi
The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
N. Tolou
Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Delft, The Netherlands
P. Valdastri
STORM Lab, Mechanical Engineering Department, Vanderbilt University, Nashville, TN, USA
J. L. Herder
Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Delft, The Netherlands
A. Menciassi
The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
P. Dario
The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy
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Obstacle-avoidance path planning based on the improved artificial potential field for a 5 degrees of freedom bending robot
Parameter optimization of a pure electric sweeper dust port by a backpropagation neural network combined with a whale algorithm
Modeling and control strategy of a haptic interactive robot based on a cable-driven parallel mechanism
Research on obstacle performance and tipping stability of a novel wheel–leg deformation mechanism
Dynamic modeling and vibration characteristics analysis of parallel antenna
Tooth profile design of a novel helical gear mechanism with improved geometry for a parallel shaft transmission
Instability load analysis of a telescopic boom for an all-terrain crane
A real-time and accurate detection approach for bucket teeth falling off based on improved YOLOX
Development of a force-field-based control strategy for an upper-limb rehabilitation robot
Research on structural parameters and kinematic properties of a drill-in granary grain condition detector
The evolution and restoration of European vertically arranged mechanical turret clocks before the 17th century
Surface modification and tooth contact analysis of variable hyperbolic circular-arc-tooth-trace cylindrical gears
Evolution and mechanism configuration synthesis of chamber clocks movement prior to 1700
Analysis of the coaxiality–geometric hysteresis model of a rotate vector reducer based on Ansys Adams
Dynamic modeling and experiment of hind leg swimming of beaver-like underwater robot
Spring efficiency assessment and efficient use of spring methods of statically balanced planar serial manipulators with revolute joints only
Structural analysis of traditional Chinese blocked-keyhole padlocks
TGA-based solutions map method for four-position synthesis of planar 4R linkage
Structural optimization of a pipe-climbing robot based on ANSYS
An innovative device for enlarging the allowable misalignment for screwing tasks
Design and analysis of a hollow-ring permanent magnet brake for robot joints
Design of an origami-based cylindrical deployable mechanism
Electromyogram-based motion compensation control for the upper limb rehabilitation robot in active training
Structural analysis of ancient Chinese textile mechanisms
Stiffness analysis of a 3-DOF parallel mechanism for engineering special machining
Automatic adjustment of laparoscopic pose using deep reinforcement learning
A novel compound topological invariant for isomorphism detection of planar kinematic chains
Varying rate adaptive hybrid position–impedance control for robot-assisted ultrasonic examination system
Automation creation method for a double planet carrier gear train transplanting mechanism based on functional constraints
The singular value decomposition method of improved incidence matrix for isomorphism identification of epicyclic gear trains
Design and kinematic analysis of a multifold rib modular deployable antenna mechanism
Kinematics and control of a cable-driven snake-like manipulator for underwater application
A 2 degrees of freedom united propulsive mechanism for amphibious function inspired by frog's hindlimb
Design of a transrectal ultrasonic guided prostate low dose rate brachytherapy robot
Structural design of multi-body heave wave energy conversion system and analysis of energy efficiency of floating body on water surface
A passive upper-limb exoskeleton for industrial application based on pneumatic artificial muscles
Novel loop tree for the similarity recognition of kinematic chains
Assessment of force control for surface finishing – an experimental comparison between Universal Robots UR10e and FerRobotics active contact flange
Innovative design method for planar mechanism configuration based on component similarity discrimination
A chord-angle-based approach with expandable solution space to 1-degree-of-freedom (DOF) rehabilitation mechanism synthesis
Motion generation of a planar 3R serial chain based on conformal geometric algebra with applications to planar linkages
Design and test of a positioning system for a greenhouse electric micro-tiller based on ultra-wideband
A novel flying–walking power line inspection robot and stability analysis hanging on the line under wind loads
Simulation and analysis of a single actuated quadruped robot
Multi-objective optimization of a redundantly actuated parallel robot mechanism for special machining
Synthesis of trigonometric motion programs with lower motion characteristics
Optimal synthesis of four-bar linkages for path generation using the individual repairing method
Type synthesis approach for the 2R1T compliant parallel mechanism with a suitable constrained branch
Evolutionary multi-objective trajectory optimization for a redundant robot in Cartesian space considering obstacle avoidance
Kinematic and dynamic analysis of an omnidirectional mobile platform driven by a spherical wheel
Quansheng Jiang, Kai Cai, and Fengyu Xu
Mech. Sci., 14, 87–97, https://doi.org/10.5194/ms-14-87-2023, https://doi.org/10.5194/ms-14-87-2023, 2023
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Traditional path-planning algorithms for bending robots are often a sequence of multiple line segments and an unsmoothed curve, which causes a discontinuous robot motion. A smooth path can ensure continuous motion. We propose an improved artificial potential field-based path-planning method based on the idea of a rapidly exploring random tree (RRT) algorithm, reducing the length of and smoothing the path, thus solving the path-planning problem of a multi-degrees-of-freedom (DOF) bending robot.
Jiabao Pan, Jin Ye, Hejin Ai, Jiamei Wang, and You Wan
Mech. Sci., 14, 47–60, https://doi.org/10.5194/ms-14-47-2023, https://doi.org/10.5194/ms-14-47-2023, 2023
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Optimizing the structure of the dust extraction port is the key to effectively improving the operational performance of the sweeper. CFD methods are used to analyze the influence of parameters on the sweeping effect in combination with a gas–solid two-phase flow model. The data set is established with the help of orthogonal test methods, and a BP neural network is used to fit the structural parameters and evaluation indexes.
Da Song, Xinlei Xiao, Gang Li, Lixun Zhang, Feng Xue, and Lailu Li
Mech. Sci., 14, 19–32, https://doi.org/10.5194/ms-14-19-2023, https://doi.org/10.5194/ms-14-19-2023, 2023
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The haptic interactive robot based on a cable-driven parallel mechanism studied in this paper is mainly used for interactive training between an astronaut and a virtual environment. This haptic interactive robot can accurately simulate the motion and mechanical characteristics of objects in a microgravity environment and can safely interact with astronauts.
Minghui Zhang and Yiming Su
Mech. Sci., 14, 1–13, https://doi.org/10.5194/ms-14-1-2023, https://doi.org/10.5194/ms-14-1-2023, 2023
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A new type of wheel–leg deformation mechanism, based on an electromagnetic clutch and gear rack transmission mechanism, is designed for moving on complex terrain. The walking model is established to study the kinematics characteristics and obstacle-surmounting performance of the mechanism. The stability cone method is used to evaluate the rollover stability and anti-interference ability in order to ensure the normal operation of the mechanism.
Guoxing Zhang, Jianliang He, Jinwei Guo, and Xinlu Xia
Mech. Sci., 13, 1019–1029, https://doi.org/10.5194/ms-13-1019-2022, https://doi.org/10.5194/ms-13-1019-2022, 2022
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The closed-form dynamics equation of the 1.8 m aperture parallel antenna is established. The relationship between the mechanism's natural frequency, displacement response, and resonance frequency is obtained. Based on the dynamic model, the closed-loop motion control strategy of the parallel antenna mechanism is established. The tracking error of the pitch and azimuth motion of the parallel antenna in the workspace is within ±0.05°.
Enyi He and Shihao Yin
Mech. Sci., 13, 1011–1018, https://doi.org/10.5194/ms-13-1011-2022, https://doi.org/10.5194/ms-13-1011-2022, 2022
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A novel helical gear mechanism with improved geometry is proposed to reduce transmission errors. For the novel spiral gear mechanism with improved geometry, the maximal contact stresses change more smoothly and have a stronger bearing capacity. The results show that, under the same conditions, the gear in this paper improves the transmission accuracy, and the bearing capacity is also stronger.
Jinshuai Xu, Yingpeng Zhuo, Zhaohui Qi, Gang Wang, Tianjiao Zhao, and Tianyu Wang
Mech. Sci., 13, 991–1009, https://doi.org/10.5194/ms-13-991-2022, https://doi.org/10.5194/ms-13-991-2022, 2022
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A super element of the telescopic boom for an all-terrain crane is proposed, and its geometric nonlinear calculation is realized by the co-rotational (CR) formulation. Considering the cable force, the nonlinear equilibrium equations of the system are established, which are transformed into differential equations, and the load displacement curves of the nodes are obtained. Through the slope ratio of the load displacement curve, the judgment criterion of the instability load is established.
Jinnan Lu and Yang Liu
Mech. Sci., 13, 979–990, https://doi.org/10.5194/ms-13-979-2022, https://doi.org/10.5194/ms-13-979-2022, 2022
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Aiming at the potential safety problems caused by the looseness of bucket teeth of the electric shovel, we propose an improved YOLOX algorithm. After introducing the dilated CBAM, the deep separable convolution, and model compression, the mAP is decreased by 0.33 %, the detection speed is increased by 11.9 fps, and the model volume is reduced to 29.46 % of the YOLOX model. It provides a theoretical basis and technical support for the development of intelligent mines and mining intelligence.
Jiasheng Pan, Leigang Zhang, and Qing Sun
Mech. Sci., 13, 949–959, https://doi.org/10.5194/ms-13-949-2022, https://doi.org/10.5194/ms-13-949-2022, 2022
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Robot-assisted rehabilitation has proven to be effective for improving the motor performance of patients with neuromuscular injuries. Therefore, the main purpose of this paper is to present a new patient-cooperative control framework for an end-effector upper-limb rehabilitation robot that provides robot-assisted training for individuals with neuromuscular disorders. The feasibility of the proposed control scheme is validated via training experiments using five healthy subjects.
Qiang Yin, Junpeng Yu, Shaoyun Song, Yonglin Zhang, Gang Zhao, Zhiqiang Hao, and Ao Hu
Mech. Sci., 13, 961–978, https://doi.org/10.5194/ms-13-961-2022, https://doi.org/10.5194/ms-13-961-2022, 2022
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In order to store grain in large warehouses, a process is required that will prevent the effects of mildew and heat. Real-time monitoring of the grain status is needed. Using the information obtained from the monitoring system, corresponding measures were taken for the heating and mildew points in the grain pile. We proposed a drill which is a granary grain condition detector. It can be equipped with temperature, CO2, and humidity sensors and gather information by entering the grain pile.
Tsung-Yi Lin and Wen-Feng Lin
Mech. Sci., 13, 933–948, https://doi.org/10.5194/ms-13-933-2022, https://doi.org/10.5194/ms-13-933-2022, 2022
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This study mainly analyzed the mechanism and technology of nine existing vertically arranged mechanical turret clocks manufactured in Europe from the 15th to the 17th century, in order to determine the design rules based on mechanical evolution and variation. This study provided new historical materials that could be applied in the research of science and technology history, as well as in innovative and science education.
Yongping Liu and Dengqiu Ma
Mech. Sci., 13, 909–920, https://doi.org/10.5194/ms-13-909-2022, https://doi.org/10.5194/ms-13-909-2022, 2022
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Firstly, the tooth surface modification method based on the parabolic forming blade and cutter inclination was proposed. Next, the modified tooth surface equation was deduced and the 3D reconstruction of the modified tooth surface is realized. Then, the influence of modification parameters on tooth surface curvature characteristics was analysed. Finally, the tooth contact analysis model was established to discuss the influence of modification parameters on the elliptical contact area.
Tsung-Yi Lin and Wen-Feng Lin
Mech. Sci., 13, 877–897, https://doi.org/10.5194/ms-13-877-2022, https://doi.org/10.5194/ms-13-877-2022, 2022
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Chamber clocks are weight-driven wall clocks and the first type of domestic clocks to be widely used in the home. In this study, we used the method of mechanical evolution and variation, analyzed and compared clock movements based on historical data and existing clocks, and synthesized all possible movement configurations of early-day chamber clocks.
Yongming Liu, Lei Fu, Zhuanzhe Zhao, Qiang Ma, Yujian Rui, and Zhen Zhang
Mech. Sci., 13, 855–866, https://doi.org/10.5194/ms-13-855-2022, https://doi.org/10.5194/ms-13-855-2022, 2022
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The coaxiality–geometric hysteresis model of the RV reducer transmission system is established, and the model is simulated and analyzed with Adams software. The results show that coaxiality is one of the main error factors affecting hysteresis. This research can provide a theoretical basis and reference materials for the measurement and design of RV reducer hysteresis, as well as the design of the RV reducer performance high-precision detection device and its adjustment mechanism.
Gang Chen, Zhenyu Wang, Jiajun Tu, and Donghai Wang
Mech. Sci., 13, 831–842, https://doi.org/10.5194/ms-13-831-2022, https://doi.org/10.5194/ms-13-831-2022, 2022
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In the research and development process of underwater motion control of the beaver-like robot, the hind leg and tail are the main actuators. In order to estimate the driving force of the robot autonomously during underwater movement, we propose this model, which can quickly and easily infer the force of the hind leg on the body. The correctness of this model is verified by experiments and simulations.
Chia-Wei Juang, Chi-Shiun Jhuang, and Dar-Zen Chen
Mech. Sci., 13, 817–830, https://doi.org/10.5194/ms-13-817-2022, https://doi.org/10.5194/ms-13-817-2022, 2022
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This paper proposes a spring efficiency assessment and the efficient use of springs methods for a static spring-balanced manipulator. Gravity is balanced by springs; however, it also contains counter-effects between springs. Conceptually, with fewer counter-effects between springs, there is less burden on the spring system, which means that the springs are used more efficiently. Through adjustment of the springs' attachment and parameters, a method to use springs efficiently is developed.
Yang Zhang, Hsin-Te Wang, Jian-Liang Lin, Chin-Fei Huang, and Kuo-Hung Hsiao
Mech. Sci., 13, 791–802, https://doi.org/10.5194/ms-13-791-2022, https://doi.org/10.5194/ms-13-791-2022, 2022
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Barbed-spring padlocks are the typical locks used in ancient China, and can be divided into three main types, namely open-keyhole, hidden-keyhole, and blocked-keyhole padlocks. With the combinations and changes of springs, keys, and keyholes, the padlocks have a variety of different unlocking methods which provide higher security. Six examples are provided to demonstrate the opening processes of blocked-keyhole padlocks.
Yehui Zhao, Lijun Xue, Guangming Wang, Fanglei Zou, Yue Song, and Hongjian Zhang
Mech. Sci., 13, 771–790, https://doi.org/10.5194/ms-13-771-2022, https://doi.org/10.5194/ms-13-771-2022, 2022
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In this study, we want to design a 4R linkage so that a point on its coupler can pass through the four specified positions. However, for most synthesis problems, the number of feasible solutions in the solution domain is seriously insufficient. Therefore, a solutions map method was proposed to realize the visualization of the solution domain and a telomere genetic algorithm (TGA) was proposed to optimize solutions map, so as to improve the number and proportion of feasible solutions.
Yi Zheng, Minghua Liu, Baoshun Li, Guoqing Ma, and Maohua Xiao
Mech. Sci., 13, 725–733, https://doi.org/10.5194/ms-13-725-2022, https://doi.org/10.5194/ms-13-725-2022, 2022
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In order to improve the structural performance of the out-of-pipe pipe-climbing robot, the out-of-pipe pipe-climbing robot is optimized. The structure and size of the robot was optimized. Static and modal analyses were then performed on key robot components and ANSYS was used for topology optimization. It was found the weight of the optimized frame and clamping arm were respectively reduced by 24 % and 20 %, and the maximum stress was respectively reduced by 46 % and 20 %.
Hao-Tien Ku and Yu-Hsun Chen
Mech. Sci., 13, 701–712, https://doi.org/10.5194/ms-13-701-2022, https://doi.org/10.5194/ms-13-701-2022, 2022
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To lower the frequency of suspending and calibrating a robot manipulator, an innovative device for enlarging the allowed position error is proposed in this study. It is a purely mechanical device without any electrical sensors. A trigger mechanism with a spring is used to replace a touch sensor and an actuator, and a six-bar linkage delivers the bolt to the hole that the trigger mechanism detected for it to be screwed in. The functions of the new device are verified through prototype testing.
Ruoyu Tan, Jieji Zheng, Bin Yu, Baoyu Li, Dapeng Fan, and Xin Xie
Mech. Sci., 13, 687–699, https://doi.org/10.5194/ms-13-687-2022, https://doi.org/10.5194/ms-13-687-2022, 2022
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A novel hollow-ring permanent magnet brake integrated in robot joints is proposed, which allows the brake to require much less axial space and provides more than 1.5 times braking torque for the same volume as the conventional electromagnetic-spring friction brake. A coupled dynamics model of the proposed brake is developed from machine-electric-magnetic aspects. The 3D model of the brake is simulated through finite-element software. The theoretical models are verified through experiments.
Long Huang, Peng Zeng, Lairong Yin, and Juan Huang
Mech. Sci., 13, 659–673, https://doi.org/10.5194/ms-13-659-2022, https://doi.org/10.5194/ms-13-659-2022, 2022
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This paper proposes a novel origami-based deployable mechanism, which can be deployed from the cuboid folded configuration to the cylindrical configuration. In comparison with the reported deployable mechanism composed of links, the hinge arrangement of the proposed mechanism makes it easier to achieve a higher stiffness. It is applied to the design of a parabolic cylindrical deployable antenna, and a scaled prototype of the antenna is constructed to verify the feasibility of the design.
Qiaoling Meng, Yiming Yue, Sujiao Li, and Hongliu Yu
Mech. Sci., 13, 675–685, https://doi.org/10.5194/ms-13-675-2022, https://doi.org/10.5194/ms-13-675-2022, 2022
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This paper proposes a novel EMG-based motion compensation controller in active training control to improve patients’ active participation. After proposing an upper limb rehabilitation robot and doing the path plan, the EMG compensation experiments and the active training control experiment are done to prove that the method can control the robot in providing auxiliary force according to patients’ motion intents. The robot can guide the patients in implementing reference tasks in active training.
Shi-Wu Li, Kan Shi, Ming-Jie Wang, and Yan-An Yao
Mech. Sci., 13, 625–634, https://doi.org/10.5194/ms-13-625-2022, https://doi.org/10.5194/ms-13-625-2022, 2022
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China is one of the first countries that produced textiles in the world. It has designed and developed a variety of equipment to facilitate textile work. However, due to unclear descriptions in the records and illustrations, a variety of designs with different structures may have been produced. This paper briefly analyzes the structures of textile mechanisms and explores the degree of freedom of the mechanisms to find feasible designs in line with functional requirements.
Haiqiang Zhang, Jianglong Tang, Changtao Yan, Guohua Cui, Minghui Zhang, and Yan'an Yao
Mech. Sci., 13, 635–645, https://doi.org/10.5194/ms-13-635-2022, https://doi.org/10.5194/ms-13-635-2022, 2022
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To improve the stiffness performance of the parallel mechanism, this paper proposes a novel 3-DOF redundantly actuated 2RPU-2SPR parallel mechanism. What is more, the stiffness model of the parallel mechanism is deduced and the accuracy of the stiffness model is verified through finite-element analysis. Finally, the simulation experiment results demonstrate that the redundantly actuated parallel mechanism has better stiffness performance compared to a traditional 2RPU-SPR parallel mechanism.
Lingtao Yu, Yongqiang Xia, Pengcheng Wang, and Lining Sun
Mech. Sci., 13, 593–602, https://doi.org/10.5194/ms-13-593-2022, https://doi.org/10.5194/ms-13-593-2022, 2022
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We designed a motion controller through deep reinforcement learning. The laparoscopic visual field image is input to the controller, and the controller outputs the joint motion of the laparoscopic arm to adjust the visual field. During the movement of the surgical instrument in different trajectories, the controller keeps the surgical instrument in an appropriate position in the visual field. It proves that the method is widely effective and can meet the needs of doctors during surgery.
Yingxian Wang, Rongjiang Cui, and Jinxi Chen
Mech. Sci., 13, 585–591, https://doi.org/10.5194/ms-13-585-2022, https://doi.org/10.5194/ms-13-585-2022, 2022
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This paper use the topological characteristic constants for isomorphism identification, such as the power value sequence (PVS), least distance matrix sequence (LDMS), and loop number (LN). The fourth PVS, the LDMS, and the LN are compared and arranged in descending order, forming a strong complementary chain. Our results show that solving the problem of the isomorphism identification of the kinematic chain (KC) based on graph theory definition has no advantage in efficiency.
Zhanxin Xie and Zheng Yan
Mech. Sci., 13, 559–575, https://doi.org/10.5194/ms-13-559-2022, https://doi.org/10.5194/ms-13-559-2022, 2022
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Robotic ultrasonic scanning needs to apply an appropriate force for a long time during the acquisition process. Excessive contact force may lead to deformation and even hurt the patient, while insufficient force would lead to poor image quality. We proposed a varying rate hybrid position–impedance control strategy, which can partly play the role of an ultrasound sonographer and serve as a medical assistant to reduce their workload.
Liang Sun, Xuewen Huang, Yadan Xu, Zhizheng Ye, and Chuanyu Wu
Mech. Sci., 13, 543–558, https://doi.org/10.5194/ms-13-543-2022, https://doi.org/10.5194/ms-13-543-2022, 2022
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The creation method of a 1 degree of freedom double plant carrier gear train (DPGT) transplanting mechanism was proposed based on the functional constraints. Within the eight components of the DPGT, the automatic creation of a transplanting mechanism was realized. A total of 528 DPGTs, which are suitable for transplanting, including 3 five-bar, 13 six-bar, 92 seven-bar, and 420 eight-bar configurations, were obtained for the first time.
Mingshuai Zhou, Wei Sun, Rongxuan Wu, and Wenxu Fu
Mech. Sci., 13, 535–542, https://doi.org/10.5194/ms-13-535-2022, https://doi.org/10.5194/ms-13-535-2022, 2022
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The epicyclic gear train (EGT) is a gear transmission mechanism. When the number of designed structures is increasing and structures are becoming ever more complex, manual screening is very difficult. Therefore, scholars are committed to developing an algorithm that can distinguish repetitive structures. In this paper, we use a method to transform the structural information of EGT into a matrix and extract the hidden information in the matrix to judge whether there is a repeated structure.
Dake Tian, Haiming Gao, Lu Jin, Rongqiang Liu, Yu Zhang, Chuang Shi, and Jiewei Xu
Mech. Sci., 13, 519–533, https://doi.org/10.5194/ms-13-519-2022, https://doi.org/10.5194/ms-13-519-2022, 2022
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Space deployable antenna is a new type of space structure, and one of the key payloads of spacecraft, which is widely used in mobile communication, navigation and remote sensing, deep space exploration, military reconnaissance, and other fields of science and technology and national defense. Aiming at the urgent need for the development of space deployable antenna with large aperture and a high storage rate, a new configuration of a multifold rib modular deployable antenna mechanism is proposed.
Fufeng Xue and Zhimin Fan
Mech. Sci., 13, 495–504, https://doi.org/10.5194/ms-13-495-2022, https://doi.org/10.5194/ms-13-495-2022, 2022
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To date, most underwater manipulators have been rigid-link structures with a small number of degrees of freedom and have been unable to perform well in confined spaces. Due to their high dexterity and good adaptability to different environments, snake-like manipulators have strong potential for use in complex underwater applications. In this study, a tip-following algorithm is presented to weave through confined and hazardous spaces along a defined path with high efficiency.
Yucheng Tang, Xiaolong Yang, Xiaojin Zhu, Shichao Zhou, Wenbin Zha, Yuxin Sun, and Yulin Wang
Mech. Sci., 13, 437–448, https://doi.org/10.5194/ms-13-437-2022, https://doi.org/10.5194/ms-13-437-2022, 2022
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This paper presents a novel united propulsive mechanism inspired by the frog’s hindlimb. This hybrid mechanism is composed of a planar six-bar linkage, which is designed using homotopy continuation and a spatial four-bar mechanism. The two sub-chains connected on the foot form a closed loop, which decreases the degrees of freedom (DoF) of the foot to 2. The preliminary simulations validate the amphibious function of the designed mechanism.
Xuesong Dai, Yongde Zhang, Jingang Jiang, Bing Li, and Sihao Zuo
Mech. Sci., 13, 399–409, https://doi.org/10.5194/ms-13-399-2022, https://doi.org/10.5194/ms-13-399-2022, 2022
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Transrectal prostate brachytherapy (BT) can effectively treat prostate cancer. During the operation, doctors need to hold the ultrasound probe for repeated adjustments, which makes it difficult to ensure the efficiency, accuracy, and safety of the operation. We designed an 11 DOF (degrees of freedom) active and passive transrectal BT robot based on the analysis of the transrectal prostate BT process.
Dongsheng Cong, Hao Jing, Ruijun Zhang, Zhongyue Lu, Jianzhong Shang, and Zirong Luo
Mech. Sci., 13, 411–425, https://doi.org/10.5194/ms-13-411-2022, https://doi.org/10.5194/ms-13-411-2022, 2022
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Due to the defects of the internal structure and energy supply carrier, conventional deep sea unoccupied marine equipment cannot meet the requirements of low power consumption. The energy efficiency characteristics of floating bodies with different shapes were simulated, and the amplitude response operator (RAO), radiation damping, added mass and Froude–Krylov force of floating bodies with different shapes were compared.
Maria Paterna, Stefania Magnetti Gisolo, Carlo De Benedictis, Giovanni Gerardo Muscolo, and Carlo Ferraresi
Mech. Sci., 13, 387–398, https://doi.org/10.5194/ms-13-387-2022, https://doi.org/10.5194/ms-13-387-2022, 2022
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We present a novel exoskeleton based on deformable pneumatic actuators, known as McKibben muscles or artificial muscles. The aim of this system is to support a worker during overhead tasks, in which they need to lift the arms and hold that position for a long time. Simulations have been performed, starting from a mathematical model of the exoskeleton and of the artificial muscle. A first architecture of the complete device is also presented.
Lei Wang, Liang Sun, Rongjiang Cui, Yadan Xu, Gaohong Yu, and Chuanyu Wu
Mech. Sci., 13, 371–386, https://doi.org/10.5194/ms-13-371-2022, https://doi.org/10.5194/ms-13-371-2022, 2022
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Similarity recognition of kinematic chains (KCs) is an important part of the mechanism innovation design, which can avoid isomorphism in the synthesis process and reduce the generation of redundant design schemes. In this paper, the new concepts of a loop tree (LT) and a loop tree matrix (LTM) have been proposed, which improve the efficiency of similarity recognition.
Stefan Gadringer, Hubert Gattringer, and Andreas Mueller
Mech. Sci., 13, 361–370, https://doi.org/10.5194/ms-13-361-2022, https://doi.org/10.5194/ms-13-361-2022, 2022
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We introduce different test scenarios and set-ups for a force control assessment. The force control of Universal Robots (UR10e) and FerRobotics (ACF-K 109/04) are evaluated. A force/torque sensor, mounted below a work piece, measures the applied force by the UR or by the ACF. Results for both UR and ACF force control are presented for varying desired contact velocities and forces. These results show the advantage of the ACF-K 109/04 over the UR10e force control for highly dynamic scenarios.
Weiwei Hong, Jinxi Chen, Bingliang Ye, and Rongjiang Cui
Mech. Sci., 13, 353–359, https://doi.org/10.5194/ms-13-353-2022, https://doi.org/10.5194/ms-13-353-2022, 2022
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To obtain all mechanical schemes, scholars in this field have proposed an innovative design method using kinematic chain configuration synthesis. However, the existing innovative design method easily produces redundant design schemes. We analyze the similar component discrimination method for mechanisms from the perspective of graph theory and apply it to the specialization of topological graphs to solve the problem of redundant design schemes.
Wei Wei, Xin Shu, Peng Chen, and Xiangyun Li
Mech. Sci., 13, 341–352, https://doi.org/10.5194/ms-13-341-2022, https://doi.org/10.5194/ms-13-341-2022, 2022
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We propose a novel mechanism synthesis approach for a 1-degree-of-freedom (DOF) rehabilitation robot, based on chord angle descriptor (CAD) and error tolerance expansion, to generate a pool of mechanism solutions from which mathematically and practically optimal solutions can be selected. A design example of a 1-DOF rehabilitation robot for upper-limb training is provided to demonstrate the efficacy of our novel approach.
Lei Wang, Gaohong Yu, Liang Sun, Yuzhu Zhou, and Chuanyu Wu
Mech. Sci., 13, 275–290, https://doi.org/10.5194/ms-13-275-2022, https://doi.org/10.5194/ms-13-275-2022, 2022
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Many linkage mechanisms can be broken into components consisting of planar two-revolute (2R) and three-revolute (3R) serial chains, such as the five-, six-, and eight-bar mechanisms. In this study, a new method for the dimensional synthesis of the planar 3R serial chain for motion generation based on CGA is presented. The proposed method provides a new meaning for the motion synthesis of planar serial chains and can be applied to many other types of planar mechanisms.
Ying Lin, Qian Chen, Haijun Zhang, Ye Ma, Wenlian Zeng, Guojun Wei, Hongxiang Wang, and Maohua Xiao
Mech. Sci., 13, 225–237, https://doi.org/10.5194/ms-13-225-2022, https://doi.org/10.5194/ms-13-225-2022, 2022
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A positioning system for ultra-wideband (UWB) electric micro-tillers suitable for complex greenhouse environments was designed as the basis for realising unmanned micro-tillers to address the problem of frequent safety accidents of existing micro-tillers. The positioning system of the greenhouse electric micro-tiller designed in this paper demonstrates a stable performance and positioning accuracy to meet the needs of greenhouse rotary tillage operations.
Xinyan Qin, Bo Jia, Jin Lei, Jie Zhang, Huidong Li, Bo Li, and Zhaojun Li
Mech. Sci., 13, 257–273, https://doi.org/10.5194/ms-13-257-2022, https://doi.org/10.5194/ms-13-257-2022, 2022
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Power line inspection not only wastes human and material resources, but also has a high-risk factor for manual inspection of power lines. Therefore, based on previous researchers, we designed a novel power line inspection robot. We also investigate walking stability of the robot on the line when encountering working conditions with crossing wind, since the power line is about 50–60 m from the ground and the inspection robots are greatly affected by wind.
Changtao Yan, Kan Shi, Haiqiang Zhang, and Yanan Yao
Mech. Sci., 13, 137–146, https://doi.org/10.5194/ms-13-137-2022, https://doi.org/10.5194/ms-13-137-2022, 2022
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Aiming at the complex control system of a quadruped robot, a leg structure of a quadruped robot was designed based on mechanism synthesis. The innovativeness of this robot is that it can achieve a special gait driven only by a single motor. Simulation and experimental analysis prove that the mechanism is reasonable, reliable and can meet the requirements of linear walking and climbing. The conclusions of this research will be useful for application in field of single actuated quadruped robots.
Haiqiang Zhang, Jianglong Tang, Qing Gao, Guohua Cui, Kan Shi, and Yan'an Yao
Mech. Sci., 13, 123–136, https://doi.org/10.5194/ms-13-123-2022, https://doi.org/10.5194/ms-13-123-2022, 2022
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Compared with the two traditional intelligent optimization algorithms, the results show that the particle swarm optimization configuration algorithm, based on an improved orthogonal experiment design, has a better optimization effect, and the results are improved to a certain extent. The evaluation indexes of a multi-objective optimization design are often contradictory. The designer needs to compromise and select an appropriate parameter design value.
Kuan-Lun Hsu
Mech. Sci., 13, 111–121, https://doi.org/10.5194/ms-13-111-2022, https://doi.org/10.5194/ms-13-111-2022, 2022
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A family of trigonometric motion programs can be condensed into a general expression, and motion programs with lower peak kinematic values are synthesized with ease. The presented phase angle function makes the formulation of motion programs more simple, and a modified phase angle function is proposed to reduce motion characteristics. The synthesis process and results are clearly presented by illustrative examples.
Xinyuan Yao, Xingdong Wang, Wei Sun, Jianyi Kong, and Zhongkang Lin
Mech. Sci., 13, 79–87, https://doi.org/10.5194/ms-13-79-2022, https://doi.org/10.5194/ms-13-79-2022, 2022
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In this paper, a novel and effective constraint handling method called the individual repairing method is introduced. This method transforms every infeasible point in the search space into a unique
corresponding feasible point, so as to ensure the success and effectiveness of the optimization. This is the defining and innovative essence of this study compared with other relevant work. Based on the new constraint handling method, the optimization of path synthesis can be effectively carried out.
Yajie Zhou, Shihua Li, Jing Sun, and Li Yi
Mech. Sci., 13, 67–78, https://doi.org/10.5194/ms-13-67-2022, https://doi.org/10.5194/ms-13-67-2022, 2022
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A systematic methodology for the type synthesis of a compliant parallel mechanism (CPM) with a suitable constrained branch is introduced. The whole type synthesis principle is built upon the rigid-body-replacement method and the freedom and constraint topology approaches. A series of 2R1T motion CPMs with a suitable constraint branch are proposed. These synthesized compliant mechanisms have potential applications to posture adjustments for the space optical load in the aerospace field.
Yong Liu, Xiang Li, Peiyang Jiang, Zhe Du, Zhe Wu, Boxi Sun, and Xinyan Huang
Mech. Sci., 13, 41–53, https://doi.org/10.5194/ms-13-41-2022, https://doi.org/10.5194/ms-13-41-2022, 2022
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First, we calculated the trajectory of the end effector of manipulator. This trajectory enables the end effector to reach the desired pose. At the same time, collision detection algorithm was employed to calculate the distance between each link of the manipulator and obstacle. We utilized the multi-objective particle swarm optimization algorithm to optimize the trajectory to minimize joint motor energy consumption and reduce joint velocity and joint impact during the movement of the manipulator.
Luis Daniel Filomeno Amador and Eduardo Castillo Castañeda
Mech. Sci., 13, 31–39, https://doi.org/10.5194/ms-13-31-2022, https://doi.org/10.5194/ms-13-31-2022, 2022
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In mobile robot development, the designer focuses on the novelty of the final element, leaving out the mobile platform evolution; the chief problem with wheeled mobile robots is the restricted movement in the workspace due to the necessity for the system's reorientation. Our goal is to realize a wheeled mobile robotic system that can generate an omnidirectional displacement without the need to redirect the wheels, thus guaranteeing continuous operation.
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