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A Method of Hysteresis Modeling and Traction Control for a Piezoelectric Actuator
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 Title & Authors
A Method of Hysteresis Modeling and Traction Control for a Piezoelectric Actuator
Sung, Baek-Ju; Lee, Eun-Woong; Lee, Jae-Gyu;
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The dynamic model and displacement control of piezoelectric actuators, which are commercially available materials for managing extremely small displacements in the range of sub-nanometers, are presented. Piezoceramics have electromechanical characteristics that transduce energy between the electrical and mechanical domains. However, they have hysteresis between the input voltage and output displacement, and this behavior is very demanding and complicated. In this paper, we propose a method of designing the control algorithm, and present the dynamic modeling equations that represent the hysteretic behavior between input voltage and output displacement. For this process, the piezoelectric actuator is treated as a second-order linear dynamic system and system constants are determined by the system identification method. Also, a classical PID controller is designed and used to regulate the output displacement of the actuator. To evaluate the performance of the proposed method, numerical simulation results are presented.
Hysteresis modeling;Piezoelectric actuator;PID control;System identification;
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