mimo decoupling control method based on siso compact format model-free controller and partial derivative information

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 partial derivative information, 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 theSISO tight-form model-free controller; by using partial derivative information 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 agradient 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 onlinedecoupling 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 partial derivative information. 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...

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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 model-free controller and partial derivative information, which can simultaneously solve the problem of online self-tuning parameters of the SISO compact model-free controller and the relationship between multiple SISO systems. It provides a new method to solve the control problem of MIMO system

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