Extended-state-observer-based full-order sliding mode control method of chaotic system of permanent magnet synchronous motor

Abstract

The invention relates to an extended-state-observer-based full-order sliding mode control method of a chaotic system of permanent magnet synchronous motor. The method comprises: a chaotic model, an initialization system state, and correlated control parameters of a permanent magnet synchronous motor system are established; on the basis of coordinate conversion, the permanent magnet synchronous motor chaotic model is converted into one based on a standard extended state observer design suitable for a non-linear extended state observer design; a full-order sliding mode controller is designed based on the extended state observer to eliminate a buffeting phenomenon in the sliding mode control and guarantee that the system state can be convergent to a zero point rapidly and stably. According to the full-order sliding mode control method, the buffeting phenomenon in sliding mode control can be prevented and the chaotic state of the system can be guaranteed to be convergent to the zero point rapidly and stably.

Description

technical field [0001] The invention relates to a full-order sliding mode control method for a permanent magnet synchronous motor chaotic system, in particular to a full-order sliding mode control method for a permanent magnet synchronous motor chaotic system whose partial states and upper bounds of nonlinear uncertain items are unknown. Background technique [0002] Permanent magnet synchronous motor (PMSM) is a typical multivariable, strongly coupled nonlinear system, which has been widely used in high-performance systems such as robots, aerospace vehicles and servo turntable control. However, research in recent years has shown that permanent magnet synchronous motors will exhibit chaotic characteristics under certain conditions. The existence of chaotic behavior will generate irregular current noise, which seriously affects the stable operation of the system and causes inconvenience to the application of PMSM. Therefore, how to effectively control and eliminate the chaoti...

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Problems solved by technology

[0004] In order to overcome the shortcomings of permanent magnet synchronous motors showing chaotic characteristics under certain parameter conditions and partial chaotic states are not easy to measure accurately, the present invention provides a full-order sliding mode control method for permanent magnet synchronous motor chaotic systems based on extended state observers, eliminating All states of the system are completely measurable. The extended state observer is used to estimate the system state and uncertain items, and a full-order sliding mode control method is designed based on the estimated value to suppress the chattering problem in the sliding mode control and ensure that the chaotic state of the system is fast. Converges steadily to zero

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