Experimental characterization and modeling of stress-dependent hysteresis of a giant magnetostrictive actuator  

作　　者：ZHANG Zhen MAO JianQin ZHOU KeMin 

机构地区：[1]School of Automation Science and Electrical Engineering,Beijing University of Aeronautics and Astronautics [2]Department of Electrical and Computer Engineering,Louisiana State University,Baton Louge,LA 70803-5901,USA

出　　处：《Chinese Science Bulletin》2013年第7期656-665,共10页

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 91016006 and 91116002);the Fundamental Research Funds for the Central Universities

摘　　要：The hysteresis nonlinearity of giant magnetostrictive actuator(GMA) is stress-dependent.In this paper,laboratory experiments were performed to characterize the stress-dependent hysteresis properties of a GMA under different compressive stresses ranging from ?11.3 MPa to ?24.3 MPa and harmonic current excitation with amplitudes from 0.6 A to 1.2 A.The experimental results showed that remarkable changes in peak-peak displacement responses,hysteresis loop width and hysteresis loss occurred with the increasing of compressive stress;no significant changes in coercive current were observed.Based on the analysis of experimental data and discussion of the influences of the weights of Modified Prandtl-Ishlinskii(MPI) on the characteristics of hysteresis loops,a stress-dependent Prandtl-Ishlinskii(SDPI) model was proposed by extending the MPI model to describe the effects of compressive stress,in which the weights of deadzone operators are extended as function of compressive stress.Good agreements were obtained between the model simulation results and the experimental data.Additional model validations were given by the performances of tracking control experiments with an inverse feedforward controller.The experimental results have clearly shown that the inverse SDPI is effective for compensating stress-dependent hysteresis including major and minor loops.The hysteresis nonlinearity of giant magnetostrictive actuator （GMA） is stress-dependent. In this paper, laboratory experiments wcrc performed to characterize the stress-dependent hysteresis properties of a GMA under different compressive stresses ranging from -11.3 MPa to -24.3 MPa and harmonic current excitation with amplitudes from 0.6 A to 1.2 A. The experimental results showed that remarkable changes in peak-peak displacement responses, hysteresis loop width and hysteresis loss oc- curred with the increasing of compressive stress; no significant changes in coercive current were observed. Based on the anal- ysis of experimental data and discussion of the influences of the weights of Modified Prandtl-lshlinskii （MPI） on the charac- teristics of hysteresis loops, a stress-dependent Prandtl-lshlinskii （SDPI） model was proposed by extending the MP1 model to describe the effects of compressive stress, in which the weights of deadzone operators are extended as function of compressive stress. Good agreements were obtained between the model simulation results and the experimental data. Additional model val- idations were given by the performances of tracking control experirnents with an inverse feedibrward controller. The experi- mental results have clearly shown that the inverse SDPI is effective for compensating stress-dependent hysteresis including major and rninor loops.

关 键 词：实验室实验 迟滞非线性 应力范围 超磁致伸缩致动器 超磁致伸缩执行器 地球化学特征 建模 表征 

分 类 号：TP215[自动化与计算机技术—检测技术与自动化装置] TE21[自动化与计算机技术—控制科学与工程]