Improved active disturbance rejection control technology temperature control system applied to chemical production

Abstract

The invention discloses an improved active disturbance rejection control technology control system. The control system mainly comprises an input module, an improved ADRC (active disturbance rejectioncontroller) and an execution module. The input module comprises a flow data acquisition module and a control object, the improved ADRC comprises a tracking differentiator, an expansion observer and anonlinear state error feedback controller. An output module comprises a cold water valve. According to the invention, improvement is carried out on the tracking differentiator, the expansion observerand the active disturbance rejection control structure, and the system has the technical effects that: the improved controller and control structure are not affected by the number of iterations, precise requirement for parameters is lowered, after the system is applied to a complex technological process, the active disturbance rejection time is prolonged, the robustness is higher, and compared with a traditional ADRC, the improved active disturbance rejection controller is wider in applicability. And the active disturbance rejection control effect is obviously better than that of a Smith estimation compensator with an anti-interference effect.

Description

technical field [0001] 1 The present invention relates to ADRC technology, specifically an improved ADRR temperature control system applied to chemical production. Background technique [0002] 2. The concept of Active Disturbance Rejection Control (ADRC) is a new type of control method proposed by Mr. Han Jingqing of the Chinese Academy of Sciences. Because of its simple algorithm, fast convergence speed, small overshoot, and strong anti-interference performance, it was quickly obtained after it was proposed. It has been widely used, but in the process of application, it is also found that the ADRC method is still insufficient in some aspects, so there is a certain room for improvement. In the improvement of ADRC, the control strategy, tracking differentiator and Improvements to the extended state observer have immediate effects. [0003] 3 The reactor is one of the important equipments to ensure the production of the chemical industry. The stability of its temperature and...

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Problems solved by technology

[0002] 2. The concept of Active Disturbance Rejection Control (ADRC) is a new type of control method proposed by Mr. Han Jingqing of the Chinese Academy of Sciences. Because of its simple algorithm, fast convergence speed, small overshoot, and strong anti-interference performance, it was quickly obtained after it was proposed. It has been widely used, but in the process of application, it is also found that the ADRC method is still insufficient in some aspects, so there is a certain room for improvement. In the improvement of ADRC, the control strategy, tracking differentiator and Improvements to the extended state observer have the direct effect of

However, these methods all need to know the precise mathematical model of the system, and the mechanism modeling method involves a series of issues such as material balance, energy conservation and chemical reaction process, and it is difficult to obtain a specific model in practice;

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