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Adaptive cascade PID control method

A technology of cascade control and control method, which is applied in the field of adaptive cascade PID control in industrial systems, and can solve problems such as inappropriate adaptive cascade PID control system design

Inactive Publication Date: 2011-01-19
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

But this invention is proposed for single-loop PID control system,

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  • Adaptive cascade PID control method
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  • Adaptive cascade PID control method

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Abstract

The invention provides an adaptive cascade PID control method. In the method, based on conventional cascade PID control, an adaptation module is introduced into a cascade PID control system, and control parameters of a master controller in the cascade PID control are directly generated by an online fuzzy identification method and a recursive least square algorithm according to the historical information of the control system, so that the robustness and adaptive capability of the cascade PID control system are improved; and in the process of online identifying the control parameters of the master controller, the influence of a secondary controller to the control performance of the system is reflected by the output of a main loop of the cascade PID control system, and good control effect can be obtained only by performing online regulation on the control parameters of the master controller in the system.

Description

technical field [0001] The invention belongs to the field of industrial process control, in particular to the technology of self-adaptive serial PID control for industrial systems. Background technique [0002] Cascade PID control system has been widely used in actual industrial process control. Conventional cascade PID control is a multi-loop control system, such as figure 1 As shown, it includes the master controller G c1 , sub-controller G c2 , the leading area G of the control object p2 and the inert area G of the control object p1 by master controller G c1 and sub-controller G c2 Carry out cascade control; the cascade PID control system includes two closed loops: 1) by the leading area G of the control object p2 and sub-controller G c2 2) The inert area G of the control object p1 , main controller G c1 The main circuit composed of the secondary circuit. The input and output of the main loop are respectively the expected output value r of the control object p...

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Application Information

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IPC IPC(8): G05B13/04
Inventor 陈红王广军王志杰
Owner CHONGQING UNIV
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