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An Additional Controller Design Method for Automatic Control

A technology with additional controllers and design methods, applied in the directions of adaptive control, general control system, control/regulation system, etc., can solve problems such as relying on accurate mathematical models, unable to achieve optimal performance, unable to guarantee optimal performance, etc. The effect of avoiding complex problems, improving control effects, and reducing design difficulty

Active Publication Date: 2017-01-04
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

Although direct adaptive control avoids the problem of model identification, it generally cannot guarantee optimal performance
[0007] In summary, the existing control methods have defects such as relying on precise mathematical models, being unable to adapt to system changes, and unable to achieve optimal performance.

Method used

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  • An Additional Controller Design Method for Automatic Control
  • An Additional Controller Design Method for Automatic Control
  • An Additional Controller Design Method for Automatic Control

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Embodiment Construction

[0037] The additional controller design method for automatic control that the present invention proposes comprises the following steps:

[0038] (1) Let the control object be:

[0039] x k+1 =F(x k ,u k )

[0040] Among them, x is the state of the control object (the state is the position, speed, temperature and other parameters of the controlled system), k is the sampling time of the state of the control object, k=1,2,3...,x k is the state vector of the control object at the kth sampling moment, which contains multiple state components, and x k (1), x k (2),x k (3),...represents the state component, u kis the control parameter output by the controller (such as control force, control voltage, etc.), F(x k , u k ) is the control parameter u of the control object at the current sampling time k and the state x at the current sampling moment k and the state x at the next sampling moment k+1 relationship function;

[0041] (2) Assume that there is an original controlle...

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Abstract

The invention relates to a design method for an automatically controlled additional controller, belonging to the field of an automatic control technology. The design method comprises the steps of adopting an online near-optimal technology of an additional learning structure based on an approximate dynamic planning to enable the design of the controller not to be dependent on a precise mathematic model, and giving out an optimal additional controller through online learning. The design method can be carried out in the on-line operation of a controlled member, so that the parameter design of a controller can be carried out without halting; furthermore, the control effect of the controlled member can be improved according to the assessment of effectiveness of control measures set by a user, so that the method can be extensively applied to various controlled members and meet various control requirements; furthermore, the design method has adaptive capacity on the parameter and structure change of the controlled members, so that the optimal performance of the controlled member can be maintained, and the operation benefit of the control system in various conditions can be improved.

Description

technical field [0001] The invention relates to a design method of an additional controller for automatic control, belonging to the technical field of automatic control. [0002] technical background [0003] During the operation of the control system, parameter and structure changes will inevitably occur. Traditional Proportional-Integral-Derivative (PID) controllers cannot make adaptive adjustments to such changes, resulting in a decrease in the performance of the control system. [0004] The optimal control method can give the optimal control of the system through systematic and analytical design means. However, the optimal control method strictly depends on the precise mathematical model of the system. When there is a modeling error or the model changes, the optimality of the controller is no longer established, and in extreme cases it may even lead to system instability. [0005] The robust control method designs a robust controller by minimizing the disturbance gain t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 刘锋郭文涛刘璋玮梅生伟
Owner TSINGHUA UNIV
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