A New Composite Tracking Control Method for Chemical Batch Process

A technology of composite tracking and control methods, applied in the field of automation, can solve the problems of chemical intermittent process lag, system stability and control performance decline, etc., and achieve the effect of good control performance

Active Publication Date: 2021-07-23
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem of serious lag in chemical batch process is common in the expansion of industrial process, which will affect the stability of the system and the decline of control performance to a certain extent.

Method used

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  • A New Composite Tracking Control Method for Chemical Batch Process
  • A New Composite Tracking Control Method for Chemical Batch Process
  • A New Composite Tracking Control Method for Chemical Batch Process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] Take the water injection process control of a three-capacity water tank as an example:

[0057] Each water injection process in the process can be regarded as an intermittent process, and the adjustment method is to control the height of the liquid level by adjusting the flow rate of the pump.

[0058] Step 1. Establish a model of a chemical batch process, specifically:

[0059] In the chemical batch process, the discrete state space model is established for the system with partial actuator failure as follows:

[0060]

[0061] Among them, t represents a finite discrete time, k is a periodic index, and k takes any natural number; i=1,2,...r; r is any non-zero natural number; z(t,k) represents the state of the liquid level in the water tank;

[0062]

[0063] z j (t, k) is the jth elastic language variable, j=1,2,...,p, p represents the number of conditional language variables; M ij (z j (t,k)) is z j (t,k) in an elastic language set M ij The membership funct...

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Abstract

The invention discloses a novel compound tracking control method for chemical batch process. The present invention first uses the local nonlinearization method to establish the discrete model of the chemical batch process, then introduces the tracking control law, defines the process control system in which the state error and tracking output error of the system are expanded, and finally adopts a compensation control algorithm to design the update law, According to the closed-loop system model and stability conditions, the gain of the controller is obtained, and then the update law and control law are obtained. Compared with the traditional control strategy, the novel composite tracking control strategy proposed by the present invention can achieve good tracking characteristics by using tracking feedback control of tracking control along the process direction, and ensure better control performance of the system.

Description

technical field [0001] The invention belongs to the technical field of automation and relates to a novel compound tracking control method. Background technique [0002] With the development of industry, industrial process control is widely used in chemical industry, medicine, biological products, modern agriculture and other fields. With the increase of product demand, the scale of automatic control system is gradually expanded, and mass production needs to be run in a complex environment. But in the case of limited production technology, production machines may break down under long-term operation. From the point of view of safe production and economic benefits, it is hoped that after the fault is fixed, the system is still stable and has certain tracking control performance. The problem of serious lag in chemical batch process is common in the expansion of industrial process, which will affect the stability of the system and the decline of control performance to a certai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张日东李平
Owner HANGZHOU DIANZI UNIV
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