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Ultrasonic motor chaos control system and method

An ultrasonic motor, chaos control technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the problem of not considering the value of the neighborhood of the period value, not the best Delay time, optimal delay time change, etc.

Inactive Publication Date: 2012-09-26
HENAN UNIV OF SCI & TECH
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Problems solved by technology

When these two methods select the delay time τ, they only make the delay time τ close to or equal to a certain period value, without considering the values ​​outside the neighborhood of the period value, so the τ determined by the two methods may not be the optimal delay time ; Moreover, due to the obvious time-varying nonlinearity and strong coupling characteristics of ultrasonic motors, this "best delay time" will also change

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  • Ultrasonic motor chaos control system and method
  • Ultrasonic motor chaos control system and method
  • Ultrasonic motor chaos control system and method

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] The present invention designs the ultrasonic motor speed control system such as figure 1 shown. Each link in the figure and its interaction relationship are introduced one by one below. The system consists of two speed controllers with voltage amplitude and frequency as control variables. The frequency-speed controller is used to quickly complete the large-scale adjustment of the speed and improve the response speed. The voltage-speed controller adjusts the voltage amplitude to realize the steady-state control of the speed and eliminate the steady-state error. Here, both the frequency-speed controller and the voltage-speed controller adopt PI control. The input of the chaos controller is the driving voltage amplitude of the motor, and the output is the perturbation signal applied to the input terminal of the voltage-speed controller to eliminate ch...

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Abstract

The invention relates to an ultrasonic motor chaos control system and method. Delay time is under online adaptive control according to a fuzzy logic principle, a value of the delay time is not only limited to a period value or a neighborhood range of the period value, thus obtaining a more effective ultrasonic motor chaos control system. The delay time is under the online adaptive control according to the fuzzy logic principle, so that the value of the delay time is not only limited to the period value or the neighborhood range of the period value, thus obtaining the more effective ultrasonic motor chaos control system.

Description

technical field [0001] The invention relates to an ultrasonic motor, in particular to the technical field of drive control of an ultrasonic motor. Background technique [0002] Ultrasonic motor (USM) is a new type of motion control actuator, which has a working principle and structure different from traditional electromagnetic motors. The characteristics of USM make it have a wide range of application prospects in the field of high-end and general motion control. [0003] The ultrasonic motor speed control system will appear chaotic behavior within a certain parameter range, which will affect the stable operation of the ultrasonic motor. In order to suppress the chaotic behavior in the ultrasonic motor speed control system, chaos control is required. The delay feedback control method has a simple structure and is easy to implement. It is a commonly used chaos control method for traditional electromagnetic motors. The delay feedback control method belongs to the existing ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/14
Inventor 史敬灼刘博李文娟宋潇赵福洁
Owner HENAN UNIV OF SCI & TECH