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Disturbance compensation control method for CSTR system

A technology of disturbance compensation and control method, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of poor system dynamic and steady-state performance, achieve strong anti-load capability, good control effect, improve The effect of system performance

Active Publication Date: 2019-03-19
扬中市广善科创服务有限公司
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Problems solved by technology

However, these control methods are often affected by external disturbances, resulting in poor dynamic and steady-state performance of the system.

Method used

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  • Disturbance compensation control method for CSTR system
  • Disturbance compensation control method for CSTR system
  • Disturbance compensation control method for CSTR system

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings, specific parameters and simulation waveforms of the CSTR system.

[0045] In order to illustrate the technical solution of the present invention more clearly, the specific implementation of the present invention will be described in detail in comparison with a set of specific parameters of CSTR and its simulation results in MATLAB software. Obviously, what is described below is only for a specific CSTR system. For those skilled in the art, if this method is used for disturbance observation, analysis and calculation should also be performed on the parameters of the specific applied CSTR system.

[0046] The schematic diagram of the CSTR system used in the simulation experiment is as follows: figure 1 shown. The parameters for setting the CSTR system are q=1, q c =0.28,δ 1 =10,u 1 =1, u 2 =0, u 3 =-1. In this simulation experiment, the initial state of the CSTR sys...

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Abstract

The invention discloses a disturbance compensation control method for a CSTR system and belongs to the technical field of automatic control. The method constructs an auxiliary system based on a disturbance observer theory by utilizing a dynamic input-output model in a CSTR system mathematical model, and then designs a novel disturbance observer. In the CSTR control system, output physical quantityis reactor temperature and cooling jacket temperature, an intermediate variable chemical reaction concentration in a CSTR system mathematical model expression is eliminated according to the CSTR system mathematical model expression, so as to obtain a second-order differential expression between the reactor temperature and a reaction input concentration. By using a second-order differential equation, the auxiliary system with the same structure is constructed, an output is z1, an input is h, and h is K times of error between x2 and z1. In the novel disturbance observer, an estimated value of disturbance of the CSTR system is q times of a difference between h and u1, wherein q is a system coefficient. The disturbance compensation control method for the CSTR system has the advantages of being easy to realize, stronger in load resistance, and capable of improving system performance and realizing better control effect.

Description

technical field [0001] The invention relates to a disturbance compensation control method of a CSTR system, which belongs to the technical field of automatic control. Background technique [0002] The Continuous Stirred Tank Reactor (CSTR) is a common process industrial equipment. Due to the diversity and complexity of the chemical reactions in the reactor, the general conventional PID control can no longer meet the requirements. Then there are many control methods that have been applied in CSTR control system, such as predictive control, fuzzy control and adaptive control and so on. However, these control methods are often affected by external disturbances, resulting in poor dynamic and steady-state performance of the system. [0003] It is worth pointing out that in the actual control system, in order to weaken the influence of the external disturbance of the system, it is often a common method to introduce an observer for disturbance compensation. The invention intends ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 丁世宏梅珂琪李鸿一马莉
Owner 扬中市广善科创服务有限公司
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