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Electric heating furnace temperature control method

A temperature control method and technology of electric heating furnace, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problem of poor input form adaptability, less application of minimum beat control system, and insufficient control effect. question

Inactive Publication Date: 2016-08-31
CENT SOUTH UNIV
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Problems solved by technology

However, because the traditional minimum-beat control algorithm is sensitive to changes in system parameters and has poor adaptability to system input forms, the minimum-beat control system is rarely used in the actual industrial field, and its good control effect has not been fully reflected. Therefore, it is necessary to develop a fast, stable, accurate, simple and widely adaptable minimum beat controller design method

Method used

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  • Electric heating furnace temperature control method
  • Electric heating furnace temperature control method
  • Electric heating furnace temperature control method

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Embodiment Construction

[0044] See attached figure 1 , the specific working process of the heating furnace temperature control system of the present invention is as follows: the temperature signal (0-200°C) collected by the temperature transmitter Pt100 is converted into a corresponding current signal (4-20mA), which is used as the S7-300PLC The input is sampled by the S7-300PLC and transformed into a real-time temperature value, which is transmitted to the PC that executes the control algorithm through the Ethernet. The PC calculates the control temperature according to the improved minimum beat algorithm described in the present invention. Measure u, and then transmit it to S7-300PLC through Ethernet, and the PLC performs D / A conversion on the control quantity to convert it into an analog signal (0-10V voltage signal) and output it to the voltage regulating module, and then control the resistance wire of the heating furnace The heating power finally realizes the control of the temperature of the he...

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Abstract

The invention discloses an electric heating furnace temperature control method, which employs a single circuit heating furnace as a controlled object, and according to the strong-nonlinearity and pure lag characteristics of the controlled object, employs a piecewise linearization processing method to design a least-beat algorithm controller, allowing the controlled object to possess a unique corresponding largest ascending velocity at any effective starting temperature and any effective temperature outburst value, and effectively solving poor control effects caused by incomplete matching between model parameters and real objects. The invention also employs an improved least-beat control algorithm with an attenuation factor, realizes control amount flexibility, allows a system to rapidly and stably enter a stable state process from a dynamic state process, and effectively reduces the overshoot of a heating furnace temperature control system. An integrating link is provided based on the improved least-beat algorithm, thereby eliminating system stable state errors, and finally realizing heating furnace temperature rapid and accurate control.

Description

technical field [0001] The invention relates to the technical field of process control automation, in particular to a design method for an electric heating furnace temperature controller based on an improved minimum beat algorithm. Background technique [0002] In the field of automation control technology, the process control system is a kind of automatic control system that takes the parameters that characterize the production process as the controlled object and makes it close to a given value or maintains it within a given range. The main parameters that characterize the process are temperature , pressure, flow, liquid level, composition, concentration, etc., through the control of these process parameters, can reduce production energy consumption, increase product output, and improve production quality. The general process control system usually adopts the form of feedback control, which is the main method of process control. The temperature control of the heating furna...

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 彭辉聂仕媛田晓盈罗旭光程琢张天曾灿
Owner CENT SOUTH UNIV
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