Method for controlling vibration hydraulic cylinder of crystallizer

A crystallizer vibration and control method technology, applied in the field of hydraulic cylinder control, can solve problems such as waveform distortion, large amplitude deviation, and fast dynamic response of the system, and achieve small waveform distortion and mechanical impact, small actual amplitude error, and dynamic response fast effect

Inactive Publication Date: 2011-05-18
WISDRI ENG & RES INC LTD
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the system has the characteristics of the set value changing with time and the nonlinearity of the hydraulic components, it is difficult for the traditional control method to achieve the req

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
  • Method for controlling vibration hydraulic cylinder of crystallizer
  • Method for controlling vibration hydraulic cylinder of crystallizer
  • Method for controlling vibration hydraulic cylinder of crystallizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] like figure 1 As shown, the present invention provides a control strategy for the hydraulic cylinder of the non-sinusoidal vibration device of the continuous casting machine crystallizer. The control strategy adopts the predictive controller with correction; adopts the improved PID controller; The opening degree of the servo valve is calculated by the concept of directional control, so as to ensure that the crystallizer can move precisely according to the preset trajectory.

[0035] Below in conjunction with accompanying drawing and formula, the present invention will be further described:

[0036] A control method for a crystallizer vibration hydraulic cylinder, which uses a corrected predictive controller, an integral improved PID closed-loop controller, and a valve forward and reverse control method to calculate the set value of the servo valve opening SPSV, any t The setting value SPSV(t) of the opening of the servo valve at any time is calculated by the following ...

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 method for controlling a vibration hydraulic cylinder of a crystallizer. The method is characterized in that a prediction controller provided with a corrector, an integrally improved PID (proportion integration differentiation) closed loop controller and a valve forward and reverse control method are adopted to calculate the set aperture of a servo valve SPSV, the set aperture of the servo valve at any moment t SPSV (t) is calculated by the following function: SPSV(t)=KPN*SPSV0(t); SPSV0(t)=SPSV1(t)+SPSV2(t); ER(t)=SP(t)-PV(t); and SP(t)=Aset*SP1(t)+Offset. The tracking characteristic of a hydraulic system is good, thus the crystallizer can completely move according to a preset track. The invention has the advantages of stability, reliability, high control accuracy, fast dynamic response and is easy to maintain. The error between the set amplitude and the actual amplitude is small, frequency tracking is stable, wave form distortion and mechanical shock are less.

Description

technical field [0001] The invention relates to a control method of a hydraulic cylinder, in particular to a hydraulic cylinder control on a hydraulic vibration device of a continuous casting machine crystallizer in the metallurgical industry. Background technique [0002] Mold vibration is one of the key technologies of the continuous casting machine. It is equivalent to a demoulding function. Its purpose is to prevent the billet from being bonded and causing cracking or breakout. At the same time, when the mold vibrates up and down, it periodically Changing the relative position of the molten steel surface and the mold wall is beneficial to improving the lubrication condition of the inner wall surface of the mold, reducing the adhesion resistance and friction resistance, and improving the surface quality of the slab. When the mold moves upwards, the newly born slab shell is bonded with the copper wall to prevent the slab shell from being subjected to greater stress and cra...

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
IPC IPC(8): B22D11/053B22D11/16
Inventor 蔡炜叶理德苏瑞淼刘斌奇孙铁汉
Owner WISDRI ENG & RES INC LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap