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Anti-disturbance distribution shape control method for styrene bulk polymerization based on disturbance observer

A technology of disturbance observer and ontology aggregation, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of particle size distribution shape control, poor stability, etc., and achieve improved stability, suppressed interference, and good Effects of approximation and accuracy

Active Publication Date: 2022-04-26
YANGZHOU UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a styrene bulk polymerization anti-interference distribution shape control method based on an interference observer, which is used to solve the problems of poor stability and particle size distribution shape control under the condition of input interference in the existing reaction system

Method used

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  • Anti-disturbance distribution shape control method for styrene bulk polymerization based on disturbance observer
  • Anti-disturbance distribution shape control method for styrene bulk polymerization based on disturbance observer
  • Anti-disturbance distribution shape control method for styrene bulk polymerization based on disturbance observer

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Embodiment Construction

[0062] Such as figure 1 The shown method for controlling the anti-disturbance distribution shape of the chemical polymerization system based on the disturbance observer comprises the following steps:

[0063] Step 1) According to the elementary reaction of styrene bulk polymerization, the molecular weight distribution model of the polymer is obtained; specifically: the operation of bulk free radical polymerization is carried out in a continuous stirred tank reactor, the reaction monomer is styrene, and the initiator It is azobisisobutyronitrile, the two streams involved in the reaction, the monomer and the initiator dissolved in the monomer, are pumped into the reactor at a certain flow rate through the control device, and at the same time, the whole process is required to maintain a constant temperature. A flow meter measures the flow, and the schematic diagram of the device is shown in figure 2 As shown, throughout the process, the inlet flow rate and stream ratio can be c...

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Abstract

The invention discloses a method for controlling the anti-interference distribution shape of styrene bulk polymerization based on a disturbance observer, comprising: obtaining a parameterized model of the polymer according to the elementary reaction in the styrene bulk polymerization reaction; The particle size distribution function output by the system is approximated, and the weight vector at the corresponding time is calculated. Based on the input and output data pairs, the state space model between the weight vector and the control input is established by using the subspace identification method; according to the state space model, the existence of interference is also considered In this case, design a PI controller and a disturbance observer respectively to realize the estimation of the unknown disturbance and the effective control of the output distribution function; combined with the Lyapunov stability analysis method, the corresponding controller gain and observer gain are obtained by solving, and the completion For the anti-interference control of the styrene bulk polymerization process, the invention can provide reliable anti-interference performance and improve the stability of the styrene bulk polymerization reaction process.

Description

technical field [0001] The invention relates to an anti-jamming distribution method, in particular to a styrene bulk polymerization anti-jamming distribution shape control method, which belongs to the technical field of anti-jamming control. Background technique [0002] In the past few decades, the control of stochastic systems has been a very active research direction in control theory and applications, and its in-depth research and application are of great significance. With the continuous development of science and technology and the continuous deepening of theoretical innovation, stochastic systems have widely penetrated into aerospace, electronics, communication, astronomy, medicine, biochemistry, finance and other fields. Early research on stochastic system control focused on the statistical properties of the system variables themselves. Typical examples include minimum variance control, linear Gaussian quadratic forms, and systems with Markov jump parameters. Consid...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
Inventor 裔扬顾翔张晓莉
Owner YANGZHOU UNIV
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