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Signal compensation PID (Proportion Integration Differentiation) control method and device based on multi-step prediction

A technology of signal compensation and multi-step prediction, applied to controllers with specific characteristics, electric controllers, etc., can solve problems such as increased energy consumption and material consumption, inability to achieve optimal operation of industrial processes, and product quality fluctuations

Pending Publication Date: 2022-07-26
NORTHEASTERN UNIV
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Problems solved by technology

[0006] In view of this, the present application provides a signal compensation PID control method, device, computer equipment and computer-readable storage medium based on multi-step prediction. control objectives, which in turn leads to the inability to realize the optimal operation of the industrial process, resulting in fluctuations in product quality and increased energy and material consumption.

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  • Signal compensation PID (Proportion Integration Differentiation) control method and device based on multi-step prediction
  • Signal compensation PID (Proportion Integration Differentiation) control method and device based on multi-step prediction
  • Signal compensation PID (Proportion Integration Differentiation) control method and device based on multi-step prediction

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[0028] Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the application will be more thoroughly understood, and will fully convey the scope of the application to those skilled in the art.

[0029] The applicant realizes that the raw ore needs to be continuously added during the smelting process of fused magnesia, and the constant change of the raw ore particle length and impurity composition causes the constant change of the raw ore properties, so that the dynamic characteristics of the electrode current are always changing during the smelting process. The electrode current generated by the control technology is difficult...

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Abstract

The invention discloses a signal compensation PID (Proportion Integration Differentiation) control method and device based on multi-step prediction, relates to the technical field of industrial production process control, and can reduce the deviation between an electrode current and a current set value and improve the control capability of a control system on the electrode current and the stability of the electrode current. The method comprises the following steps: in response to an electrode current regulation and control demand, describing an electrode current of a target process by adopting a discrete linear model to obtain an electrode current dynamic model corresponding to the target process; calculating critical parameters of the electrode current dynamic model, and setting control parameters of a PID controller to obtain a PID feedback control law; adding an original compensation signal, calculating the original compensation signal based on an electrode current dynamic model and a PID feedback control law, and outputting a prediction compensation signal; and superposing the PID feedback control law and the prediction compensation signal as the input of the electrode current dynamic model, and controlling the output of the PID controller.

Description

technical field [0001] The present application relates to the technical field of industrial production process control, in particular to a signal compensation PID control method and device based on multi-step prediction. Background technique [0002] An industrial process is a production process consisting of one or more industrial equipment, and its function is to process the incoming raw materials into semi-finished materials required by the next process. Multiple production processes constitute a full-process production line. For example, in the smelting process of fused magnesia, magnesite ore is used as raw ore, and the raw ore in the furnace is heated and melted to form melt through arc exotherm, and the material is added while melting. The finished product is formed after crystallization. [0003] In the related art, the industrial control system adopts the PID control technology designed by conventional parameter tuning methods such as the Z-N method (Ziegler-Nichol...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 柴天佑刘宁孙思凡王维洲
Owner NORTHEASTERN UNIV
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