Research on Rate-dependent Hysteresis Characteristics of PBP Actuators and Its Linearization Control

doi:10.3901/JME.2016.12.205

Abstract

Abstract: As a kind of high displacement piezoelectric bimorph rudder actuator, the post-buckling pre-compression(PBP) actuators have a serious rate-dependent hysteresis phenomenon. In order to make the PBP actuators can be used as micro flight actuators with high control precision, parameter identification is carried out by the Hammerstein rate-dependent model based on Bouc-Wen hysteresis model, the experimental results show that rate-dependent hysteresis of the PBPs can be well predicted by this model. On the above foundation, a composite controller, which consisting of an adaptive single neuron PID and a feedforward controller, is designed for the PBP actuators, and then the displacement tracking hardware-in-loop experiments of control loop under various single and multi-frequency signals are carried out, and compared with the control effect of radial basis function neural net PID controller, the results show that the feedforward and single neuron PID composite controller has relatively faster response speed and relatively higher control precision.

Key words: Bouc-Wen hysteresis model, feedforward and adaptive PID composite controller, Hammerstein model, neural net, post-buckling pre-compression(PBP) actuator, rate-dependent hysteresis

CLC Number:

TB381

HU Kaiming, WEN Lihua. Research on Rate-dependent Hysteresis Characteristics of PBP Actuators and Its Linearization Control[J]. Journal of Mechanical Engineering, 2016, 52(12): 205-210.

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