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Nitrate nitrogen concentration control method based on time delay compensation strategy

A control method, nitrate nitrogen technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem that the concentration of nitrate nitrogen is difficult to control precisely

Pending Publication Date: 2022-05-24
BEIJING UNIV OF TECH
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Problems solved by technology

[0005] Aiming at the problem that the concentration of nitrate nitrogen is difficult to be accurately controlled due to the time-varying time-lag in the denitrification link in the process of urban sewage treatment, the present invention proposes a method for controlling the concentration of nitrate-nitrogen based on a time-delay compensation strategy. The main steps are as follows:

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  • Nitrate nitrogen concentration control method based on time delay compensation strategy
  • Nitrate nitrogen concentration control method based on time delay compensation strategy
  • Nitrate nitrogen concentration control method based on time delay compensation strategy

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Embodiment Construction

[0057] Aiming at the problem that the time delay exists in the denitrification link in the urban sewage treatment process, which makes it difficult to precisely control the nitrate nitrogen concentration, the invention proposes a nitrate nitrogen concentration control method based on a time delay compensation strategy, and the nitrate nitrogen concentration is used as a control variable. , the internal flow rate is used as the operating quantity, and the framework of the time-delay compensation control method for nitrate nitrogen concentration is as follows: figure 1 , the push-flow delay and loop delay analysis are as follows figure 2 . In order to realize the precise control of nitrate nitrogen concentration in the sewage treatment process, the proposed method for controlling nitrate nitrogen concentration based on the time-delay compensation strategy has the following steps:

[0058] A nitrate-nitrogen concentration control method based on a time-delay compensation strate...

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Abstract

The invention discloses a nitrate nitrogen concentration control method based on a time delay compensation strategy, and belongs to the field of control. Aiming at the problem that the nitrate nitrogen concentration is difficult to effectively control due to time-varying and time-lag in the denitrification process, a time-varying and time-lag model of the denitrification process is established through mechanism analysis and time-lag traceability, an unknown part in the model is identified by adopting a fuzzy neural network, and the nitrate nitrogen concentration can be effectively controlled. A Lyapunov-Crasovsky functional is utilized to compensate the influence of time lag on the control performance, and a barrier Lyapunov function is designed to ensure that the nitrate nitrogen concentration does not exceed a preset range. The result shows that the control method effectively eliminates the influence of time lag, ensures the specified tracking control performance, and improves the stability of the sewage treatment process.

Description

technical field [0001] Aiming at the problem that the nitrate nitrogen concentration is difficult to control accurately due to the time-varying time delay in the denitrification link in the urban sewage treatment process, the invention proposes a nitrate nitrogen concentration control method based on a time delay compensation strategy. The time delay was traced back to the source, the time-delay mechanism model of the denitrification process was established, and the Lyapunov-Krasovsky functional and separation techniques were used to compensate for the influence of time-varying time-delay. The method can eliminate the influence of time-varying time delay on the control precision of nitrate nitrogen, ensure the expected control performance, and realize the stable and efficient operation of the sewage treatment process, which belongs to the field of control and the technical field of sewage treatment. Background technique [0002] Due to over-exploitation, poor drainage manage...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042Y02W10/10
Inventor 乔俊飞李大鹏韩红桂孙浩源
Owner BEIJING UNIV OF TECH
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