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Chemical batch process control system stability maintenance method

A technology of process control system and process system, which is applied in the field of control system stability maintenance in chemical batch industrial process, can solve the problems of control system delay, increase the risk of controller failure, and not consider the running time, etc., to achieve the goal of improving control performance Effect

Inactive Publication Date: 2018-04-20
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing control theory mainly discusses the control in one direction, without considering the important influencing factor of running time, which leads to a certain delay in the control system, which reduces the production efficiency of the chemical batch process and increases the control efficiency. risk of machine failure

Method used

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  • Chemical batch process control system stability maintenance method
  • Chemical batch process control system stability maintenance method
  • Chemical batch process control system stability maintenance method

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Experimental program
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Embodiment Construction

[0047] Take the cycle injection molding process as an example: the cycle injection molding process is a typical multi-period intermittent process, and the product quality of the cycle injection molding process is guaranteed by controlling the minimum running time.

[0048] Step 1. Aiming at the shortcomings of the traditional control strategy without considering the running time, design a new hybrid control model. The specific method is:

[0049] 1.1 Use mathematical equations to describe the dynamic changes of the cycle injection molding process system

[0050]

[0051] t=0,1,2,LT k ;k=1,2,L K k

[0052] where t and k are the time step and cycle index, respectively, and x(t,k)∈R n , u(t,k)∈R 1 , y(t,k)∈R 1 Respectively represent the state, input and output at the time t of the kth cycle in the cycle injection molding process, and x(t+1,k) represents the state at the time t+1 of the kth cycle in the cycle injection molding process. T k Indicates the duration of the k...

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Abstract

The present invention discloses a chemical batch process control system stability maintenance method. The method comprises the steps of: applying related theories of system conversion, establishing state models with different sizes, constructing corresponding conversion sequences and state matrixes according to relations between adjacent stages, designing conversion signals related to the states,establishing full conditions of ensuring index stability, designing a reliable control method, and achieving full conditions of stable operation of the control system in a lower bound of operation time. The chemical batch process control system stability maintenance method improves the defect that a traditional control strategy only considers a single variable to cause delay of a controller, effectively improves the integral performance of the controller, improves the control performances of a chemical batch process controller and ensures the product quality.

Description

technical field [0001] The invention belongs to the technical field of automation, and relates to a method for maintaining the stability of a control system in a chemical batch industrial process. Background technique [0002] In recent years, due to the rapid development of the manufacturing industry, the batch processing mode has achieved great development. In the actual production process, due to equipment aging, improper operation and other reasons, some problems will inevitably occur in the system. If these problems are not detected and eliminated in time, the system performance and production efficiency as well as product quality will decline over time. What's more, it may pose a threat to the personal safety of production personnel. Therefore, the research on system failure has become one of the hottest research directions in the field of control. If there is a problem with the adjustment mechanism, the controller will lose the ability to adjust, which will eventuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张日东王立敏
Owner HANGZHOU DIANZI UNIV
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