Nonlinear dynamic characteristics of MSMA gripper

Issue title: Proceedings from the 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2015)

Guest editors: Fumio Kojima, Futoshi Kobayashi and Hiroyuki Nakamoto

Article type: Research Article

Authors: Xu, Jia^a | Kong, Yingxiao^a | Zhu, Zhiwen^{b; 1; *}

Affiliations: [a] Deparment of Mechanics, Tianjin University, Tianjin, China | [b] Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, Tianjin, China

Correspondence: [*] Corresponding author: Zhiwen Zhu, Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control, 92 Weijin Road, Nankai District, Tianjin 300072, China. E-mail:zhuzhiwen@tju.edu.cn

Abstract: A kind of magnetic shape memory alloy (MSMA) gripper is proposed in this paper, and its nonlinear dynamic response in bounded noise and harmonic magnetic fields is described. The traditional SMA gripper has slow response limited to the response characteristics of SMA. In this paper, MSMA film is applied in gripper to substitute the traditional SMA film to improve the response speed. Nonlinear differential items are introduced to interpret MSMA's hysteretic phenomena, and the nonlinear dynamic model of the MSMA gripper in bounded noise and harmonic magnetic fields is developed. The dynamic response of the system is obtained, and the bifurcation characteristics of the system are analyzed. The results of numerical simulation and experiments show that the stochastic noise intensity has important influence on the system's dynamical response, and the heteroclinic orbit occurs with the stochastic noise intensity variety. The results of this study are helpful for the application of MSMA gripper in engineering fields.

Keywords: Magnetic shape memory alloy (MSMA), gripper, hysteretic nonlinear characteristics, bifurcation

DOI: 10.3233/JAE-162046

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 52, no. 3-4, pp. 959-966, 2016