Crossover position automatic adjustment technologies for servovalve of hydraulic pressure AGC control system

A control system and automatic adjustment technology, applied in rolling mill control device, servo motor assembly, fluid pressure actuating device, etc., can solve problems such as control sensitivity and stability decline

Inactive Publication Date: 2008-06-25
上海欧达电气成套设备工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In view of the deficiencies in the above servo valve control, the purpose of the present invention is to provide a servo valve zero automatic adjustment technology in the hydraulic AGC control system to solve the control sensitivity and stability caused by the zero drift of the servo valve. The problem

Method used

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  • Crossover position automatic adjustment technologies for servovalve of hydraulic pressure AGC control system
  • Crossover position automatic adjustment technologies for servovalve of hydraulic pressure AGC control system
  • Crossover position automatic adjustment technologies for servovalve of hydraulic pressure AGC control system

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with embodiment.

[0034] The hydraulic AGC control system of this embodiment uses Siemens STEP 7 programming software. The method for automatically adjusting the zero position of the servo valve is to call FB41 to continuously control the PID intelligent regulator module in the Siemens STEP 7 programming software, and fill in the corresponding parameters after processing. to the corresponding position, and then convert the control output value LMN of the PID intelligent regulator module into the given value of the analog output module to control the opening of the servo valve. The parameters related to control in the calculation follow the following rules:

[0035] SP - INT = G - SV G - M...

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Abstract

The invention discloses a servo valve zero position automatic adjusting technology in a hydraulic AGC control system. The technology adopts a dynamic zero position adjusting method and utilizes a PID intelligent adjuster to directly compare a target roll gap value and an actual roll gap value after range conversion and transfer the difference value into an opening value of the servo valve and adjust a balance point of the two values dynamically; once the target roll gap value and the actual roll gap value exceed the error range, then the PID intelligent adjuster automatically adjusts the opening of the servo valve to lead the two values to approach to the target value rapidly. The invention solves the error control caused by the zero position excursion of the servo valve through changing a fixing zero position control of the servo valve into a dynamic control, thereby improving the reliability and stability of the AGC control system.

Description

Technical field: [0001] The invention relates to the technology of an automatic thickness control system (AGC) in the steel plate rolling process in the metallurgical industry, in particular to the technology of automatically adjusting the zero position of a servo valve in a hydraulic AGC control system. Background technique: [0002] In the metallurgical industry, the processing accuracy of cold-rolled sheet thickness is very high, and the thickness tolerance is generally required to be controlled within 0.01mm. To achieve such a purpose, automatic thickness control system (AGC) is used to achieve. The AGC system controls the thickness of the plate by adjusting the gap size of the rolling rolls. There are two commonly used methods of electric adjustment and hydraulic adjustment. Hydraulic adjustment has become the development direction due to its small inertia, quick response, high cut-off frequency, good followability, and high adjustment accuracy. The hydraulic servo v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/16F15B13/00F15B13/12
Inventor 陈广达王国阳
Owner 上海欧达电气成套设备工程有限公司
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