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Two-degree-of-freedom internal model control analysis method for industrial heating furnace

A technology of control analysis and degree of freedom, applied in the field of automation, can solve problems such as insufficient control accuracy

Active Publication Date: 2019-01-01
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of insufficient control accuracy of the traditional two-degree-of-freedom internal model control method in industrial process production, and then proposes a two-degree-of-freedom internal model control analysis method for industrial heating furnaces

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  • Two-degree-of-freedom internal model control analysis method for industrial heating furnace
  • Two-degree-of-freedom internal model control analysis method for industrial heating furnace
  • Two-degree-of-freedom internal model control analysis method for industrial heating furnace

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Embodiment Construction

[0069]The present invention will be further described below.

[0070] Take the actual industrial heating furnace temperature control as an example:

[0071] Step 1, establish the process model of the heating furnace, the specific steps are:

[0072] 1.1 First consider the input and output temperature data of the heating process of the industrial heating furnace, and establish the model transfer function of the heating furnace and the standard proportional-integral-derivative controller transfer function, as shown in the following formula:

[0073]

[0074]

[0075] Among them, P(s) is the model of the heating process of the heating furnace, K is the process gain coefficient; T is the process time constant; τ represents the delay time; C(s) is the transfer function of the PID controller; K c is the proportional gain of the controller; T i is the integral time constant of the controller; T d is the derivative time constant of the controller.

[0076] 1.2 Suppose there ...

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Abstract

The invention discloses a two-degree-of-freedom internal model control analysis method for an industrial heating furnace. The method includes the following steps that: step 1, the process model of a controlled object is established; step 2, a two-degree-of-freedom internal model PID controller is designed; and step 3, stability analysis is performed on the designed controller. With the two-degree-of-freedom internal model control analysis method for the industrial heating furnace of the invention adopted, a two-degree-of-freedom internal model PID control method is improved; transient responseis improved through the external PD controller; and therefore, a system can achieve both good tracking performance and interference suppression performance, and the control requirements of the systemcan be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of automation, and relates to a two-degree-of-freedom internal model control analysis method of an industrial heating furnace. Background technique [0002] With the continuous improvement of production technology, the level of process control requirements are also increasing. PID controllers have a high utilization rate in industrial production processes, but ordinary PID controllers often cannot achieve satisfactory control accuracy. Internal model PID control is a very practical control method with simple design and convenient adjustment of parameters, but it usually cannot take into account the set point tracking performance and interference suppression performance at the same time, and the regulator parameter selection should be between the two A compromise is made, but the two-degree-of-freedom internal model control structure currently used is a traditional structure, and its control structure is com...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 张日东李孜伟
Owner HANGZHOU DIANZI UNIV
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