Title :
Adaptive inverse control of piezoelectric actuators with hysteresis operators
Author :
Kuhnen, K. ; Janocha, H.
Author_Institution :
Lab. for Process Autom., Univ. of Saarland, Saarbrücken, Germany
fDate :
Aug. 31 1999-Sept. 3 1999
Abstract :
The present paper will describe an approach for the compensation of the hysteretic transfer characteristics of a piezoelectric stack transducer by an adaptive inverse hysteretic control. The basis of the inverse control is formed by a weighted superposition of elementary stop-type hysteresis operators which, in terms of mathematics, can be easily described and which reflect the qualitative properties of the inverse transfer characteristic of the transducer. Starting with a linear characteristic the weigths of an inverse hysteretic observer are identified during operation by a stable adaption law and transformed to the controller parameter. As a result the maximum linearity error caused by hysteresis is lowered about one order of magnitude.
Keywords :
adaptive control; hysteresis; nonlinear control systems; observers; piezoelectric actuators; piezoelectric transducers; adaptive inverse hysteretic control; elementary stop-type hysteresis operators; hysteresis operators; hysteretic transfer characteristics; inverse hysteretic observer; inverse transfer characteristic; maximum linearity error; piezoelectric actuators; piezoelectric stack transducer; qualitative properties; stable adaption law; weighted superposition; Adaptation models; Hysteresis; Mathematical model; Observers; Piezoelectric actuators; Process control; Transducers; adaptive control; hysteresis; nonlinear control; piezoelectric actuator;
Conference_Titel :
Control Conference (ECC), 1999 European
Conference_Location :
Karlsruhe
Print_ISBN :
978-3-9524173-5-5
