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MIMO (multiple input and multiple output) Decoupling control method based on SISO (single input and single output) tight-form model-free controller and system errors

A system error, decoupling control technology, applied in general control systems, control/regulation systems, adaptive control, etc.

Active Publication Date: 2018-05-04
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] For this reason, the present invention proposes a MIMO decoupling control method based on the SISO compact format model-free controller and system error, which can simultaneously solve the problem of online self-tuning parameters of the SISO compact format model-free controller and between multiple SISO systems. The problem of online decoupling provides a new method for solving the control problem of MIMO systems

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  • MIMO (multiple input and multiple output) Decoupling control method based on SISO (single input and single output) tight-form model-free controller and system errors
  • MIMO (multiple input and multiple output) Decoupling control method based on SISO (single input and single output) tight-form model-free controller and system errors
  • MIMO (multiple input and multiple output) Decoupling control method based on SISO (single input and single output) tight-form model-free controller and system errors

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[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] figure 1 The principle block diagram of the present invention is given. According to the coupling characteristics and tendency characteristics of the MIMO system, select an input and an output to form a SISO system, repeat m times, and decompose the MIMO system into m mutually coupled SISO systems, and any one of the SISO systems The input is not used as the input of other SISO systems, and the output of any SISO system is not used as the output of other SISO systems; m SISO systems are controlled by m SISO compact-form model-free controllers.

[0053] For the jth (1≤j≤m) SISO compact format model-free controller, the jth SISO compact format model-free controller parameter includes a penalty factor λ j and the step factor ρ j ; Determine the parameters to be tuned of the jth SISO compact format model-free controller, the jth SISO comp...

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Abstract

The invention discloses an MIMO (multiple input and multiple output) decoupling control method based on SISO (single input and single output) tight-form model-free controller and system errors, comprising: dividing an MIMO system into multiple mutually-coupled SISO systems according to coupling features and tendency features of the MIMO system; controlling the SISO systems via the SISO tight-formmodel-free controller; by using system errors as input based on a BP (back-propagation) neural network and comprehensively considering minimization of system error function values of all SISO system error contributions as a target, performing system error back-propagation calculating on gradient information of each parameter of the controller to be adjusted via a gradient descent method in conjunction with control input, so that parameters of the SISO tight-form model-free controller, such as penalty factor and step factor, are self-adjusted online, and online decoupling of the multiple SISO systems are synchronously achieved. The method provided herein provides good control and is an effective means to solve the MIMO system control problem.

Description

technical field [0001] The invention belongs to the field of automatic control, and in particular relates to a MIMO decoupling control method based on SISO compact format model-free controller and system error. Background technique [0002] The control problem of MIMO (Multiple Input and Multiple Output) system has always been one of the major challenges in the field of automation control. A typical feature of MIMO systems is coupling, that is to say: a change in one input often causes multiple outputs to change, and one output is often not only affected by one input; but at the same time, this coupling is in most cases , especially in the field of industrial process automation control, it will show tendentious characteristics, that is to say: a change in an input tends to cause a specific output to change significantly while affecting other outputs less, an output Tends to be significantly affected by one particular input and less affected by others. The tendency characte...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 卢建刚李雪园
Owner ZHEJIANG UNIV
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