• Optics and Precision Engineering
  • Vol. 22, Issue 3, 616 (2014)
WANG Yu-feng1, GUO Yong-xin1,2,*, and MAO Jian-qin2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/ope.20142203.0616 Cite this Article
    WANG Yu-feng, GUO Yong-xin, MAO Jian-qin. Rate-dependent modeling and tracking control of piezoelectric actuators[J]. Optics and Precision Engineering, 2014, 22(3): 616 Copy Citation Text show less

    Abstract

    A modeling method and a real-time trajectory tracking control strategy were proposed based on Hammerstein model to overcome the effect of rate-dependent hysteresis on piezoelectric actuators. First, by using modified Prandtl-Ishlinskii(MPI) model and the Autoregressive Model with Exogenous Input(ARX) to represent the static nonlinear part and the linear dynamic part of the Hammerstein model, respectively, a Hammerstein model was proposed to describe the rate-dependent hysteresis of piezoelectric actuators. Then, based on the proposed Hammerstein model,a compound control strategy with feed-forward adaptive inverse compensation and PI feed-back was designed. Finally, to verify the effectiveness of the proposed control strategy, a compound control strategy with feed-forward inverse compensation and PI feed-back was designed to compare with the proposed scheme. The experiments on the real-time tracking for single frequency signals and sweep signals with the amplitudes of 11 μm, compound frequency signals and sinusoidal scanning signals with variable amplitudes were performed in a frequency of 100 Hz, obtained results show that the root mean square error and the relative error between the reference input and the output of piezoelectric actuator are 0.280 8-0.437 3 μm and 0.016 5-0.024 4 respectively. As compared with the compound control strategy with feed-forward inverse compensation and PI feed-back, the proposed control strategy has better tracking accuracy and real-time ability.
    WANG Yu-feng, GUO Yong-xin, MAO Jian-qin. Rate-dependent modeling and tracking control of piezoelectric actuators[J]. Optics and Precision Engineering, 2014, 22(3): 616
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