Method, apparatus and device for acquiring process model

A process model and model error technology, which is applied to controllers, electric controllers, instruments, etc. with specific characteristics, can solve problems such as large errors in process models, and achieve the effect of solving large errors and excellent data processing characteristics.

Active Publication Date: 2019-09-13
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology

[0004] In view of this, the present application provides a method, device and equipment for obtaining a process model, which solves the existing technical problem that the process model obtained by using the Z-N rule has large errors

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  • Method, apparatus and device for acquiring process model
  • Method, apparatus and device for acquiring process model
  • Method, apparatus and device for acquiring process model

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[0045] The above is the first embodiment of a method for obtaining a process model provided by the embodiment of the present application, and the following is the second embodiment of the method for obtaining a process model provided by the embodiment of the present application.

[0046] see figure 2 , a schematic flowchart of a second embodiment of a method for obtaining a process model in the embodiment of the present application, including:

[0047] Step 201. Obtain the process response trend curve of the process object when a unit step is input.

[0048] In this embodiment, the process response trend curve of the process object when the unit step input is obtained is as follows: image 3 shown.

[0049] Step 202, obtaining the position point on the process response trend curve with the largest tangent slope.

[0050] In this embodiment, the position point with the largest tangent slope on the process response curve is obtained, such as image 3 Shown at point P in . ...

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Abstract

The present application discloses a method, an apparatus and a device for acquiring a process model. The method comprises: obtaining a process model of a process object according to a process responsetrend curve input by the process object in a unit step response; using an inertial combined filter to approximate a sliding window filter in the process model to obtain a new process model of the process object; and taking the new process model as a target process model of the process object. According to the technical scheme of the present application, the technical problem that the existing process model obtained by using the Z-N rule has a large error is solved.

Description

technical field [0001] The present application relates to the technical field of automatic control, in particular to a method, device and equipment for acquiring a process model. Background technique [0002] Obtaining a process model is of great significance for model-dependent control, such as Smith predictive control. Obtaining the process model in engineering technology is based on the PID controller parameter setting rule, referred to as the Z-N rule. [0003] Although the process model obtained by the Z-N rule has a certain degree of accuracy, in a system with a large amount of calculation, there is a problem of cumulative error in the gain, resulting in a large error in the obtained process model. Contents of the invention [0004] In view of this, the present application provides a method, device and equipment for obtaining a process model, which solves the existing technical problem that the process model obtained by using the Z-N rule has large errors. [0005]...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42G05B13/04
CPCG05B11/42G05B13/042
Inventor 李军
Owner GUANGDONG POWER GRID CO LTD
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