CONTROL OF TERFENOL-D UNDER LOAD

Citation
Ag. Jenner et al., CONTROL OF TERFENOL-D UNDER LOAD, Journal of applied physics, 76(10), 1994, pp. 7160-7162
Citations number
6
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00218979
Volume
76
Issue
10
Year of publication
1994
Part
2
Pages
7160 - 7162
Database
ISI
SICI code
0021-8979(1994)76:10<7160:COTUL>2.0.ZU;2-U
Abstract
A vibration control case study is described which demonstrates the app lication of magnetostrictive (Terfenol-D) actuators. The magnetomechan ical properties of the material suggests that when incorporated in dev ices for applications a nonlinear response will result. This case stud y compares the performance of two kinds of control strategy (both disc rete), a conventional proportional and integral (PI) algorithm and a v ariable structure algorithm (DVSC) in both servo and cancellation/regu lation roles. Both strategies were implemented on an INMOS(7) transput er based microcontroller with a sampling period of 300 mu s. The resul ts presented show that the control behavior of the DVSC strategy offer s significant advantages over the PI strategy when controlling actuato rs with nonlinear characteristics, i.e., the rejection of a 5 Hz distu rbance with a gain of -36 dB compared to a gain of -15 dB when using t he PI strategy.