Multi-Step Predictive Position Control of Ultrasonic Motor with Nonlinear Inverse

Author(s): Yingxi Xu, Jingzhuo Shi*.

Journal Name: Recent Advances in Electrical & Electronic Engineering
Formerly Recent Patents on Electrical & Electronic Engineering

Volume 10 , Issue 2 , 2017

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Abstract:

Background: Ultrasonic motor is a typical nonlinear system with significant time-varying characteristics. In this paper, the position control of ultrasonic motor is comprehensively studied.

Method: Firstly, a Hammerstein model is established to obtain the characteristic form of the motor operation, followed by the establishment of an inverse control model aiming to handle the nonlinear characteristic of the ultrasonic motor. By canceling the nonlinear component, the motor is modeled as a linear system and the controller is also designed linearly. The direct multi-step predictive control strategy is then designed and used to realize the precise position control on the basis of stable motor operation.

Conclusion: The experimental results show that the proposed control algorithm has superior tracking behavior and small steady-state error when the structure or parameters of the controlled object change.

Keywords: Ultrasonic motor, nonlinear inverse, multi-step prediction, position control, Hammerstein model, predictive position.

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Article Details

VOLUME: 10
ISSUE: 2
Year: 2017
Page: [142 - 149]
Pages: 8
DOI: 10.2174/2352096510666170601122220
Price: $58

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