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Fuzzy-PID compound control system for sintering-machine ignition furnaces

A composite control and furnace technology, applied in the general control system, control/regulation system, adaptive control, etc., can solve the problems of weak anti-interference ability, poor precision, unsatisfactory accuracy, etc., to improve the sintering machine speed , reduce fuel consumption, and reduce sintering negative pressure

Inactive Publication Date: 2010-06-16
NORTHERN ENG & TECH CORP MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the PID control algorithm has a simple principle, but the accuracy is not satisfactory, so the accuracy of the control system is poor, the anti-interference ability is weak, and it is easy to frequently adjust the opening of the valve.

Method used

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  • Fuzzy-PID compound control system for sintering-machine ignition furnaces
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  • Fuzzy-PID compound control system for sintering-machine ignition furnaces

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Embodiment Construction

[0066] The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

[0067] Such as figure 1 , 2 As shown, the Fuzzy-PID composite control system of the sintering machine ignition furnace of the present invention includes a PID control strategy, a detection instrument, and a control device, and is characterized in that the control flow of the Fuzzy-PID composite control program is:

[0068] 1) System data initialization,

[0069] 2) Automatically find a suitable air-fuel ratio,

[0070] 3) Set the difference between the combustion temperature and the feedback combustion temperature, and adjust the opening of the valve as the deviation value |e|,

[0071] 4) Determine whether |e|=|e 0 |, |e| is the deviation signal, |e 0 |When switching between Fuzzy and PID control, the given deviation,

[0072] 5) When |e|0 When |, adopt PID control strategy,

[0073] 6) When |e|>|e 0 When |, the fuzzy control strategy is adopted,

[0074...

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Abstract

The invention relates to an automatic control system for sintering ignition furnaces, in particular to a Fuzzy-PID compound control system for sintering-machine ignition furnaces. The system comprises PID control strategy, instrumentation and a control device. A control process comprises: controlling ignition temperature by regulating the amount of fuel and air flow; automatically finding a suitable air-fuel ratio on the premise of fixing the air flow in order to realize the highest combustion temperature and the fullest combustion; setting a valve opening degree and a feedback valve opening deviation absolute value e; judging whether the absolute value of e is equal to the absolute value of e0; adopting the PID control strategy when the absolute value of e is less than the absolute value of e0; adopting Fuzzy control strategy when the absolute value of e is greater than the absolute value of e0; allowing the output of a regulator to keep an output value under the original control strategy till next controller output value exceeds the output value when control strategy is switched; and continuously adjusting the air flow while tracking an expected combustion temperature value in order to realize that combustion temperature and the expected combustion temperature are the same or close.

Description

technical field [0001] The invention relates to a detection and control device for an ignition furnace of a sintering machine, in particular to a Fuzzy-PID composite control system for an ignition furnace of a sintering machine. Background technique [0002] As we all know, the ignition furnace of sintering machine can determine the quality, physical properties and chemical composition of sintering, and has a profound impact on the quality of blast furnace molten iron and ironmaking efficiency. The ignition furnace control is an important link in the sintering production control. The temperature of the ignition furnace and the opening of the valve not only affect the vertical sintering degree of the sintering process, but also affect the yield and productivity of sintering ore. The temperature of the ignition furnace and the opening of the valve are large, although the sintering speed is fast, the yield is low and the amount of ore returned is large; the temperature of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418G05B13/02
CPCY02P90/02
Inventor 张斌梁琼边文
Owner NORTHERN ENG & TECH CORP MCC
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