Induction heating closed loop simulation method based on finite element model and system identification

A technology of induction heating and system identification, applied in general control systems, control/regulation systems, simulators, etc., can solve the problems of poor real-time response of heating temperature and difficult control of heating temperature

Active Publication Date: 2012-11-14
杭州四达电炉成套设备有限公司
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Problems solved by technology

This method uses the finite element induction heating model and system identification method to directly tune the PID controller to realize the simulation of the closed-loop control of the induction heating temperature, reflecting the coupling effect of the el

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  • Induction heating closed loop simulation method based on finite element model and system identification
  • Induction heating closed loop simulation method based on finite element model and system identification
  • Induction heating closed loop simulation method based on finite element model and system identification

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Embodiment Construction

[0069] The principle of the invention is as figure 1 As shown, a simulation method of induction heating closed-loop system based on finite element and feedback control, (1) system identification method of induction heating process based on finite element model to obtain finite element model and system response characteristic parameters; (2) for the system Response characteristics, design the PID feedback controller; (3) Use the APDL language of ANSYS to introduce the PID feedback controller into the finite element model to realize the induction heating closed-loop system simulation based on the combination of finite element simulation and PID feedback control.

[0070] In order to better understand the technical solutions of the present invention, the specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are only used to illustrate the present invention, but n...

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Abstract

The invention discloses an induction heating closed loop simulation method based on finite element model and system identification. The method adopts ANSYS software to build a billet electromagnetic induction heating finite element model, and the simulation of billet induction heating process is realized through solving the model, thus obtaining the simulation data. The system input and output time history which is obtained through the finite element simulation is used for substituting the experimental data, a least square system identification method is adopted to process the input and output time history, and thus, system response characteristic parameters are obtained; then, a proportion integration differentiation (PID) feedback controller is designed on the basis of the model; and finally, an ansys parameter design language (APDL) is adopted to introduce the PID feedback controller into the finite element model, so the simulation process of an induction heating closed loop system is realized. The method takes the advantages of the induction heating finite element model, realizes the coupling of electromagnetic induction heating and a control system, can greatly improve the simulation precision, and facilitates the advanced performance analysis of induction heating closed loop control.

Description

Technical field [0001] The invention belongs to the field of power electronics applications, and relates to a closed loop simulation method of an electromagnetic induction heating process, in particular a closed loop simulation method of an induction heating process based on a finite element model and system identification. Background technique [0002] Induction heating technology uses electromagnetic fields to generate eddy currents to heat workpieces. Because of its fast heating speed, non-deformation of heated parts, less pollution and low energy consumption, it is widely used in billet forging, rolling, heat treatment and other industrial fields. [0003] After literature search, Zhao Min from Zhejiang University of Technology used ANSYS finite element software to establish a calculation model for finite element simulation of induction heating before forging in his master's thesis "Finite Element Simulation Analysis of 45 Steel Billet Before Forging" (2006.4), and established ...

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Application Information

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IPC IPC(8): G05B17/02
Inventor 徐哲吴坤何必仕孔亚广薛安克
Owner 杭州四达电炉成套设备有限公司
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