Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF0 Cites 14 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com