In this paper, hysteretic behavior modeling, system identification and control of a mechanism that is actuated by shape memory alloy (SMA) wires are presented. The mechanism consists of two airfoil plates and the rotation angle between these plates can be changed by SMA wire actuators. This mechanism is used to identify the unknown parameters of a hysteresis model. Prandtl–Ishlinskii method is ...

Abstract: In this paper, we developed an approach for active vibration control of flexible rectangular plate structures using control theory. The flexible rectangular plate system is firstly modelled and simulated via a finite element method; and secondly, a new type of modelling method, and the state-space model are involved in the development of the equation of motion in state-space, which is...

A high-performance triaxial fast tool servo (FTS) with the hybrid electromagnetic–piezoelectric actuation and parallel–serial-kinematic structure is reported. Featuring balanced uniform actuation, in this article, a novel axis-symmetric linearized reluctance actuator proposed to generate planar motion parallel, piezoactuated vertical then serially carried by within limited space. Verified finit...

A plate periodically bonded with piezoelectric patches on its surfaces is considered. The differential quadrature element method is used to solve the wave motion equation for the two-dimensional periodic structure. The method is very simple and easy to implement. Based on the method, band structures for in-plane wave propagating in the periodic piezoelectric plate are studied, from which the fr...

Purpose. To develop and substantiate a method for computer analysis of the stress-strain state that occurs in tubbing erector manipulator mechanism with several degrees freedom, using modern computing complexes based on finite-element method. Methodology. The research uses software complexes, help which calculation-theoretical apparatus has been created, is intended calculating dynamic static l...

In this article, Finite Element Method (FEM) and Eulerian-Lagrangies Algorithm (ELA) formulation were used to numerically simulate the impact of several low-velocity projectiles with water surface. Material models which were used to express behavior of air and water included Null material model. For the projectiles, rigid material model were applied. Results were validated by analyzing the impa...

in this paper, a new robust controller based on geometric homogeneity and adaptive integral sliding mode is proposed for a class of second order systems. the upper bound of the system disturbances is not required. fully unknown parameters have been considered in the described model and its finite–time convergence to zero equilibrium point is proved. moreover, the controller is developed in the ...

This paper presents a dynamic analysis of the ParReEx multibody mechanism, which has been designed for human wrist joint rehabilitation. The starting point research is virtual prototype mechanism. model used to simulate dynamics mechanism using ADAMS in three simulation scenarios: (a) rigid kinematic elements without friction joints, (b) with and (c) as deformable solids joints. In all cases, r...

This paper presents a novel design of a flexure-based, piezoelectric (PZT) actuated, completely decou-pled, high-bandwidth, high resolution, and large stroke parallel XY micromanipulator with two amplification levers. The monolithic mechanism is featured with dual working modes, which meets different kinds of requirements in terms of high resolution and large workspace in micro/nano fields. In ...

the need for simulation of human foot mechanism has made researchers and engineers move towards different patterns to describe this movement. in this regard, optimal solutions such as energy consumption, accuracy, etc. are of utmost importance. in this paper, efforts have been made to present a new solution by designing a fully two-dimensional six-bar mechanism with one degree of freedom so tha...