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A chemical industry process performance maintenance control method

A technique for maintaining control, an industrial process, applied in the field of automation

Active Publication Date: 2021-02-09
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control of the batch production process is a dynamic control process with strong nonlinearity and uncertainty. These factors have a great impact on the control performance indicators of the batch process.

Method used

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  • A chemical industry process performance maintenance control method
  • A chemical industry process performance maintenance control method
  • A chemical industry process performance maintenance control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Take the experiment of controlling the water level of a three-capacity water tank as an example:

[0039] In the three-tank water level experiment, only one injection was used to observe the effect of the controller. Each injection process is regarded as a batch, and then the water filling process of the three-capacity water tank is regarded as a batch process.

[0040] Step 1. Design the model of the water injection process of the three-capacity water tank. The specific steps are:

[0041] 1.1 Establish the state model of the water injection process of the three-capacity water tank, which can be described as follows:

[0042]

[0043] where t is the discrete time of the system, T is the upper bound of the discrete time, k is the batch index of the injection process; d(t) is the time delay function; x(t,k) and x(t-d(t),k) represent the water level status of the three-capacity water tank at time t and time t-d(t) of the k-th batch, respectively; Indicates the reci...

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Abstract

The invention discloses a chemical industry process performance maintenance control method, comprising the following steps: step 1, establishing a system batch process model; and step 2, designing a controller for the batch process. The method first establishes a state model with time-delay through the analysis of the continuous nonlinear model; then, iteratively learns the control quantity by designing the batch process, and defines the state error and output tracking error, and combines the error compensation technology to obtain A control update law based on tracking error is proposed, and then acts on the controlled object. The design of this batch process performance maintaining control method not only solves the nonlinear and uncertain problems in batch process control, but also ensures the stable operation of the system.

Description

technical field [0001] The invention belongs to the technical field of automation, and relates to a process performance maintenance control method in the chemical industry. Background technique [0002] In the industrial control process, the batch process control has the excellent performance of the best tracking of the given value, which ensures the consistency of product production. However, the control of batch production process is a dynamic control process with strong nonlinearity and uncertainty. These factors have a great influence on the control performance index of batch process. In order to optimize the nonlinearity and uncertainty in batch process control, especially the time delay and external disturbance in the system, an optimal performance keeper is introduced to ensure the stable operation of the system and make it have better control performance. Contents of the invention [0003] The object of the invention is to propose a chemical batch process performa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/02G05B13/04
CPCG05B13/0265G05B13/042G05B13/048
Inventor 胡晓敏徐峥邹洪波
Owner HANGZHOU DIANZI UNIV
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