An Improved Active Disturbance Rejection Technology Temperature Control System Applied in Chemical Production

Abstract

The invention discloses an improved active disturbance rejection technology control system, which mainly includes an input module, an improved active disturbance rejection controller ADRC, and an execution module. The input module includes a flow data acquisition module and a control object, the improved active disturbance rejection controller includes a tracking differentiator, an expansion observer, and a nonlinear state error feedback controller, and the output module includes a cold water valve. The invention improves the tracking differentiator, the extended observer and the active disturbance rejection control structure, and its technical effect is: the improved controller and control structure are not affected by the number of iterations, reducing the requirement for accurate parameters, and being applied to complex technological processes , the ADRC time increases, and the robustness is stronger. Compared with the traditional ADRC, the improved ADRC has wider applicability. The self-disturbance rejection effect is obviously better than the Smith predictor compensator with anti-disturbance function.

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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