An Anti-Saturation Controller Design Method for Open-loop Stability Constrained Systems

Abstract

The invention provides a general-purpose anti-saturation controller design method for an open-loop stability-limited system, and belongs to the technical field of automatic control. In order to solve the problems of closed-loop control system performance degradation, lag time extension, and overshoot increase caused by the inevitable rate saturation and amplitude saturation constraints of the open-loop stability-limited system, the present invention proposes a general anti-rate saturation Design method with amplitude saturation. The design method proposed by the present invention is simple in structure, does not need parameter adjustment, has versatility and operability, and can be easily applied to various engineering control systems to improve control algorithms such as H∞, LQG, MRAC, etc., such as ESO, Kalman, Luenberger, etc. The observer algorithm has a wide range of applications and markets.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a design method of an anti-saturation controller for an open-loop stability-limited system. Background technique [0002] The invention provides a general anti-saturation controller design method for an open-loop stability limited system, which belongs to the technical field of automatic control. [0003] In practical engineering, most of the controlled objects are open-loop stable systems, that is, when the input value of the system is constant, the output value will gradually stabilize at a constant value. With constant current and torque, the engine will eventually output a constant speed and temperature when a constant fuel flow is input. And in practical engineering, all physical systems are limited, especially by the inevitable nonlinear constraints such as rate saturation and amplitude saturation, such as the maximum / minimum limit of acceleration and deceleratio...

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Problems solved by technology

[0005] The existing anti-saturation unified framework is to introduce a feedback gain signal to adjust the output signal of the controller when the controller has integral saturation. This framework needs to design the parameter values ​​of the feedback gain matrix according to different controlled objects and control performance indicators. , the design method is complex, and it cannot be applied to unfavorable situations such as performance degradation, unmodeled system dynamics, and time-varying characteristics that are prone to occur in the actual controlled object. It lacks operability in practical applications and cannot meet the design goals.

So far, there is no published patent design method that satisfies the above three design objectives at the same time, so the present invention aims to propose an anti-saturation controller design method for an open-loop stability limited system that satisfies the above three design objectives, and is applied to In actual engineering control system

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