Abstract
High-load pinhole is the key to improve the loading ability of power units. In this paper, a feedforward compensation method by modified Prandtl-Ishlinskii (P-I) model is proposed to characterize the hysteresis of Giant Magnetostictive Actuator (GMA) used on pinhole boring system, and the validation of model is examined by comparing the input-output relations of model and experimental data under 20Hz. Finally, a feedforward controller of inverse P-I model is designed to compensate the hysteresis. The experiments show hysteresis nonlinearity of GMA is reduced effectively under a wide frequency band from 21% to 2.3%.
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