Volume 39 Issue 10
Oct.  2013
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Guo Yongxin, Mao Jianqin. Rate-dependent modeling and tracking control of giant magnetostrictive actuators[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(10): 1360-1365. (in Chinese)
Citation: Guo Yongxin, Mao Jianqin. Rate-dependent modeling and tracking control of giant magnetostrictive actuators[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(10): 1360-1365. (in Chinese)

Rate-dependent modeling and tracking control of giant magnetostrictive actuators

  • Received Date: 13 Dec 2012
  • Publish Date: 30 Oct 2013
  • A Hammerstein model was proposed to model giant magnetostrictive actuators (GMA). A modified Prandtl-Ishlinskii(MPI) model and an autoregressive model with exogenous input (ARX) were used to represent the static nonlinear part and the linear dynamic part of the Hammerstein model respectively. Model identification method was also given. The proposed model can describe the rate-dependent hysteresis of GMA from 1 Hz to 100 Hz well. A compound controller containing inverse compensator and proportional-integral-derivative (PID) feedback was designed for tracking control. Real time trajectory tracking of single frequency and composite frequency sinusoidal reference inputs with the amplitude of 16 μm was conducted. The root-mean-square error was less than 1μm and the relative error was less than 10%, which verify the effectiveness of the control strategy.

     

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