Parameter self-correcting method of position loop IP controller of alternating current servo system

Abstract

Provided is a parameter self-correcting method of a position loop IP controller of an alternating current servo system. The parameter self-correcting method of the position loop IP controller of the alternating current servo system is based on generalized predictive control. The method particularly comprises the steps that firstly, current and position signals of the alternating current servo system are extracted, and parameters of a position loop controlled model are identified in real time; secondly, based on the position loop controlled model, the optimal future position output is predicted through a simplified Diophantine equation; finally, quadratic performance evaluation indexes are optimized, the optimal control rate of a position loop is resolved, parameters of the IP controller are mapped in real time, and self-correcting of control parameters of the position loop IP controller is achieved. The IP controller replaces a traditional position loop PI controller, the parameters of the IP controller are automatically corrected in real time, high-performance position control over the alternating current servo system is achieved, and the method has the advantages that the control structure is simple, the disturbance rejection capacity is high, and position control precision is high.

Description

technical field [0001] The invention relates to the technical field of an AC servo control system, in particular to a parameter self-calibration method of a position loop IP controller of an AC servo system. Background technique [0002] The AC servo system with the goal of high speed and high precision has been widely used in high-tech fields such as laser processing, robots, and high-precision machine tools. The position loop is the outermost loop of the servo system, and it is also the ultimate embodiment of the servo control performance. The servo system has two requirements for the position loop control performance: on the one hand, it must have a stable and smooth transient response; on the other hand, the steady-state position tracking error and positioning error should be small to obtain high-precision position control performance. [0003] The AC servo system is restricted and affected by various uncertain factors during the position operation process, such as the ...

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Problems solved by technology

The model-based self-calibration method has a simple algorithm and good stability, but i

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