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Quick model prediction control method based on input trend compensation

A model predictive control and trend technology, applied in adaptive control, general control system, control/regulation system, etc., can solve the problems of shortening the steady-state time and slow response of the system, shortening the regulation time, improving the rapidity, and improving the The effect of speed of response

Inactive Publication Date: 2016-11-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the problem of slow response in the control of some fast-changing systems, the present invention will provide a model predictive control method using input trend compensation control input to improve the rapid response of the control system and shorten the time for the system to reach a steady state

Method used

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  • Quick model prediction control method based on input trend compensation
  • Quick model prediction control method based on input trend compensation
  • Quick model prediction control method based on input trend compensation

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Embodiment Construction

[0036] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0037] 1) Through mathematical modeling and analysis of the system (rudder system of underwater vehicle), a discrete state space model of the system is established. The discrete time period T is taken as 0.1s.

[0038] x(k+1)=Ax(k)+Bu(k) (1)

[0039] where the system matrix

[0040] 2) Construct the secondary performance index for the above system:

[0041] J ( k ) = Σ i = 0 N - 1 [ x T ( k + i | k ) Q x ( k + i | ...

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Abstract

The invention provides a quick model prediction control method based on input trend compensation, and belongs to the field of industrial automatic control. The method is used for further improving the response quickness of a model prediction control system, and shortens the time when the system reaches a stable state. The method mainly employs the optimal control sequence of each step, calculates the change trench based on the control input and compensates a control quantity at a moment, thereby enabling the system to reach the quickness. A simulation experiment indicates that the method is feasible, and at least can enable the response quickness of the system to be improved by 21%.

Description

technical field [0001] The invention relates to the field of industrial automatic control, in particular to a new model predictive control method based on input trend compensation. Background technique [0002] Model predictive control (Model predictive control, MPC) is a feedback control strategy that has been widely studied in recent years. It is a new intelligent control method that is most widely used in the industry besides the PID control algorithm. The mechanism of model predictive control can be described as: at each sampling moment, according to the current state and input information of the system, a finite time-domain open-loop optimization problem is solved online, and the first element of the obtained control sequence is applied to the system At the next sampling time, repeat the above process, constantly refresh the optimization problem with new predicted values ​​and obtain the latest solution. The main difference between model predictive control and other co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 李慧平范真元王婉青
Owner NORTHWESTERN POLYTECHNICAL UNIV