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Adaptive chaos control method of fractional order brushless direct current motor system

A technology of brush DC motor and chaos control, which is applied in the field of adaptive chaos control of fractional-order brushless DC motor system, and can solve problems such as difficult research and complex adaptive chaos control

Active Publication Date: 2018-01-16
CHONGQING AEROSPACE POLYTECHNIC COLLEGE
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Problems solved by technology

Affected by uncertain factors, including temperature, noise, measurement error, parameter estimation error, and device aging, the fractional-order brushless DC motor system has a high degree of uncertainty, but its adaptive chaos control is complex and difficult to study

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  • Adaptive chaos control method of fractional order brushless direct current motor system
  • Adaptive chaos control method of fractional order brushless direct current motor system
  • Adaptive chaos control method of fractional order brushless direct current motor system

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Embodiment Construction

[0062] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0063] An adaptive chaos control method for a fractional-order brushless DC motor system, comprising the following steps: (1) firstly establish a fractional-order mathematical model of the brushless DC motor system, and use the estimated value of the state variable to replace the real state of the system to be observed variable to design a fractional-order high-gain observer; (2) define the error vector, use the Chebyshev neural network to approximate the characteristics of the nonlinear function with an arbitrarily small error, and design a fractional-order Levant differential tracker to suppress the expansion of the differential term; (3) The fractional order Lyapunov ...

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Abstract

The invention discloses an adaptive chaos control method of a fractional order brushless direct current motor system. The adaptive chaos control method comprises the following steps of (1) establishing a fractional order mathematical model of the brushless direct current motor system firstly, and replacing a real state variable of a to-be-observed system with a state variable estimation value to perform design of a fractional order high-gain observer; (2) defining an error vector, approaching to the characteristic of a nonlinear function by a Chebyshev nerve network at any low error, and designing expansion value of a suppression differential item of a fractional order Levant differential tracker; and (3) solving virtual control input and actual control input by a fractional order liapunovfunction and performing stability analysis, and establishing an adaptive chaos controller in a backstepping framework through a continuous frequency distribution type model method. By virtue of the adaptive chaos control method, adaptive chaos control of the fractional order brushless direct current motor system is realized while system transient-state and steady-state performance is ensured, sothat influence of chaos vibration and the like to the control performance of the fractional order brushless direct current motor system can be suppressed.

Description

technical field [0001] The invention relates to a fractional-order brushless direct-current motor system, in particular to an adaptive chaos control method for the fractional-order brushless direct-current motor system. Background technique [0002] Brushless DC motor is an electronically driven stepless variable speed motor, which has many advantages such as good speed regulation performance, long life, easy maintenance, low noise, high power, and good dynamic response. Applications. However, brushless DC motors are exponentially sensitive to initial conditions, and the dynamics on the attractor exhibit chaotic motion, which is manifested in intermittent oscillations of speed and torque, unstable control performance, and irregular noises. It can be seen that the chaos phenomenon greatly affects the stability and safety of the brushless DC motor system, so it must be suppressed from the control method. [0003] The state variables of the fractional-order brushless DC motor...

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Application Information

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IPC IPC(8): H02P21/00H02P21/14H02P21/13
Inventor 罗绍华屈涌杰刘昭琴
Owner CHONGQING AEROSPACE POLYTECHNIC COLLEGE
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