A temperature control method of heating furnace based on a new two-degree-of-freedom internal model pid

A temperature control method and internal model controller technology, applied in the field of automation, can solve problems such as insufficient control accuracy, large time lag, and mismatch

Active Publication Date: 2021-10-26
HANGZHOU DIANZI UNIV
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the traditional two-degree-of-freedom internal model control method in industrial process production, such as large time lag, insufficient control accuracy, complex controller design, uncertain / mismatched models, etc., and proposes a new two-degree-of-freedom based The heating furnace temperature control method of internal mold PID

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  • A temperature control method of heating furnace based on a new two-degree-of-freedom internal model pid
  • A temperature control method of heating furnace based on a new two-degree-of-freedom internal model pid
  • A temperature control method of heating furnace based on a new two-degree-of-freedom internal model pid

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Embodiment Construction

[0099] The present invention will be further described below in conjunction with accompanying drawing.

[0100] Take the actual industrial heating furnace temperature control as an example:

[0101] 1. According to the first-order plus time-delay process model of the heating furnace, design a two-degree-of-freedom internal model PID controller. The specific steps are:

[0102] 1.1 First consider the input and output temperature data of the heating process of the industrial heating furnace, and establish the transfer function of the first-order plus time-delay process model transfer function of the heating furnace, as shown in the following formula:

[0103]

[0104] Among them, G(s) is the model of the heating process of the heating furnace, K is the process gain coefficient; T is the process time constant; θ represents the delay time.

[0105] 1.2 In the two-degree-of-freedom control structure, the reasonable design of the internal model control filter h(s) is as follows:...

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Abstract

The invention discloses a heating furnace temperature control method based on a novel two-degree-of-freedom internal model PID, comprising the following steps: Step 1, designing an internal model control structure; step 2, designing an improved two-degree-of-freedom internal model control structure; 3. Controller design and tuning for stable process. This method improves the two-degree-of-freedom internal model control structure. By adding weighting factors to the parameters of the set point tracking controller, it facilitates online tuning and achieves good set point tracking. For the first-order and second-order time-delay processes, different The equivalent design of the controller in the form of a PID controller can easily and conveniently obtain each setting parameter of the controller, and can make the system meet good tracking performance and interference suppression performance at the same time, and the control requirements of the system can also be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of automation and relates to a method for controlling the temperature of a heating furnace based on a novel two-degree-of-freedom internal model PID. Background technique [0002] In the actual control process, the PID controller has a high usage rate in the industrial production process, but as the requirements for product control accuracy and safe operation are getting higher and higher, ordinary PID controllers often cannot meet the requirements. For the process with time-delay model uncertainty / mismatch, the control method designed is often more complicated, and can not take into account the set point tracking characteristics and anti-interference characteristics at the same time, so the study of a new two-degree-of-freedom internal model PID control method is Necessary. Contents of the invention [0003] The purpose of the present invention is to solve the problems of the traditional two-degree-of-fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 张日东李孜伟
Owner HANGZHOU DIANZI UNIV
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