The aim of this study is finding a modified lapping method to improve the lapping effect, increase efficiency and change the present labor-intensive situation. In this study, a modified lapping tool was designed and it was designed to fit on a specially designed friction torque test machine. In addition, a set of orthogonal experiments were designed to capture the effects of four main lapping factors: friction torque, abrasive particulate size, lapping time and the rotational speed.

The research into micro machining of advanced alloys finds its applications in the aerospace, automotive, biomedical and healthcare and other industrial areas. One of the major concern is to produce parts at micro level without further rework, specifically surface finish. In order to achieve this, suitable process parameters and machining strategy needs to be identified for advanced alloy. The research presented here focuses on this aspect of the machining of Titanium Alloy.

In this paper, a numerical model for the analysis of bond-slip occurring in concrete filled steel tube (CFT) columns is introduced. The introduced model considers the bond-slip effect by incorporation of the equivalent steel stiffness. Finally, the validity of the introduced numerical model is verified by comparing the experimental data with the analytical results for CFT columns subjected to axial force and bending moment.

The conceptual design of balance shaft was very important process as how to locate the unbalance masses and corresponding supporting bearings. In this paper, the optimal conceptual balance shaft model was derived by using proposed objective functions for an inline 3-cylinder engine and an inline 4-cylinder one, respectively. Two kinds of optimal model were derived from simulations and efficient design guidelines was finally explained with design flowchart.

In order to improve the uniformity of workpiece allowance distribution, a stepwise workpiece matching adjustment method with contact inspection is developed.The stepwise matching includes the rough and fine matching processes. After matching, the spatial transformation matrixes R, T and the adjustment values of machine tool can be obtained accurately. At last, some experiments were presented to demonstrate the performance of the method.

The aim of this study is to integrate suggested control algorithms with a mechatronic design of underactuated adjustable stiffness finger for improving grasping operation. The designed robot finger system has the following main features: (1) preventing damage of objects during contact with phalanges, (2) having firm grasping, (3) adjusting grasped-forces on phalanges by stiffness of joints, and (4) implementing job independently without external control unit.

The paper presents a solution region synthesis methodology for RCCC linkages. First, we couple the RC and CC dyads for obtaining all synthesis equations. Then using the solution region theory and Bertini software, all solutions for RCCC linkages can be obtained. The key contribution of this paper is that all solutions of RCCC linkages for four specific poses are obtained. Only one RCCC linkage can be synthesized by the methods published before;

• With a large load on the vibrating table, the oscillation of the motor shaft angular velocity and the effect of friction on it are more significant. • Simulink model of the mechanism was developed for numerical calculations. • Friction increases the difference between the maximum and minimum values of the angular velocity and the coefficient of non-uniformity of rotation. • Sliding friction influences the frequency, the maximum and minimum values of the work-table kinematic parameters.

In this study, a compliant wiper mechanism is presented which can be used in land, air, and sea vehicles, particularly the automotive industry. The wiper mechanism is essentially a partially compliant four-bar mechanism. To the best of our knowledge, this is the first compliant wiper mechanism in the literature. After the theoretical calculations, a prototype is manufactured and an experiment is set up. The data obtained from the experimental setup are compared with the theoretical results.

Elastic systems that undergo large deformations are difficult to analyse because, while deforming, their mechanical properties change nonlinearly, which makes it difficult for designers to use them. In this work we make use of a graphical representation of the mechanical behaviour of a selected elastic object, a spiral spring, to facilitate the understanding of its behaviour. The use of these graphs is illustrated by generating peculiar examples of systems with many stable configurations.

The paper is concerned to the computation of eigenfrequencies of single-walled carbon nanotubes (SWCNTs). Classical treatment, where the nanotube is approximated by beam theory, is replaced by the nonlocal theory of beam bending. The eigenfrequencies are computed by combination of analytical, as well as numerical methods for four types of boundary conditions. The results can be used for determination of Young’s modulus of homogenized SWCNTs from experimental measurements.

The present work describes the design and build of a new completely mechanical propulsion system for manual wheelchairs for use in ascending or descending long ramps. The design is characterized by a self-locking mechanism that activates automatically to brake the chair when the user stops pushing. The main component of the propulsion system is a planetary gear train that can self-lock, this means that the user does not need to activate external brakes.

This paper presents a way to model the rotational constraint between beam elements in 3-D space. Beam elements are models used to simulate the behavior of slender objects. Such objects can be found for e.g. in bridges, space structures, robots, and networks of fibers (paper, cloth, biological tissue, etc). In many cases, beam elements are welded or bonded together. To model this bonding, the relative displacements and rotations shall be limited at the contact point using appropriate constraints.

A novel computational design tool to calculate the elasto-kinematic flexure hinge properties is presented. Four hinge contours are implemented. It is shown, that FEM results correlate well with the analytical design tool results. For a given deflection angle of 10° and a corner-filleted contour, the deviations of the bending stiffness are between 0.1 % and 9.4 %. The design tool can be beneficial for the accelerated and systematic synthesis of compliant mechanisms with optimized flexure hinges.

In rehabilitation, the widely existing misalignment between human limb and exoskeleton causes discomfort even danger. To alleviate the misalignment in lower extremity exoskeleton, this study proposes a compliant parallel mechanism, which has the potential to automatically change its configuration to make exoskeleton knee joint fit the human joint movements. And the self-alignment performance of the mechanism is validated via conducting a series of experiments under different working conditions.

This paper is done based on the research result for my research program. Testing results indicate that the maximal cross coupling of the 2-DOF micro-positioning stage is less than 0.1% under the full workspace with the natural frequency of 348.31Hz. The purpose of all work is to design a compliant mechanism for applying the micro-nano-positioning system. And that this work also extends my research interest in my PhD period.