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

Control method of electro-hydraulic position servo system based on disturbance compensation

An electro-hydraulic position servo and disturbance compensation technology, which is applied in the direction of adaptive control, general control system, control/adjustment system, etc., can solve the problems of unobservable matching disturbance, unfavorable engineering practice, cumbersome design process, etc., and achieve the interference estimation method The effect of convenience

Active Publication Date: 2018-06-01
NANJING UNIV OF SCI & TECH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing disturbance observers can only observe matching disturbances, but cannot observe matching disturbances
Some observers

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
  • Control method of electro-hydraulic position servo system based on disturbance compensation
  • Control method of electro-hydraulic position servo system based on disturbance compensation
  • Control method of electro-hydraulic position servo system based on disturbance compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083] The parameter values ​​of the motor servo system are as follows:

[0084] m=30kg, B=10N·m·rad-1·s -1 , V t =7.962e -5 m 3 , β e =700e 6 pa, D m =9e -4 m 2 , C t =3e -12 m 3 / s / pa,k t =1.18e -8 m 3 / s / V / pa -1 / 2 , P s =10e 6 pa.

[0085] In order to verify the control performance of the controller, the controller proposed by the present invention is named NRDC controller, and the controller used for comparison is named FLC controller. The two controllers have the same expression but different parameters. There is no disturbance compensation term for disturbance in the FLC controller.

[0086] NRDC controller parameter k 1 =1000,k 2 =2000,k 3 =1000,λ 1 =100,λ 2 =2000.

[0087] The FLC controller parameter is k 1 =1000,k 2 =2000,k 3 =1000,λ 1 =0,λ 2 =0.

[0088] Position command signal x 1d (t)=0.04sin(t)·[1-exp (-0.01t3) ]

[0089] figure 2 is the position command signal diagram, image 3 is the curve of the tracking error of the two con...

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 control method of an electro-hydraulic position servo system based on disturbance compensation, and belongs to the field of electro-hydraulic position servo control. The method includes following steps: establishing a mathematical model of the electro-hydraulic position servo system; establishing a mathematical model of a disturbance term observer; designing an electro-hydraulic position servo system controller based on disturbance compensation; and performing stability proof by employing the Lyapunov stability theory. According to the method, matched and unmatched disturbances in the electro-hydraulic servo system are estimated and compensated through the model compensation method so that the performance of the system can be effectively enhanced; and the disturbance estimation method is convenient and feasible, the practical production implementation is facilitated, and the validity of the controller is verified through comparison with a simulation result.

Description

technical field [0001] The invention relates to the field of electro-hydraulic position servo systems, in particular to a control method for electro-hydraulic position servo systems based on interference compensation. Background technique [0002] The electro-hydraulic servo system has outstanding advantages such as large transmission torque and high transmission efficiency, and is widely used in various important industrial fields, such as construction machinery, machine tools, aerospace and so on. With the rapid development of these fields, the requirements for the position tracking performance of the electro-hydraulic system are also getting higher and higher, and the performance of the system is closely related to the design of the controller. The electro-hydraulic servo system is a typical nonlinear system. In the process of designing the controller, it will face many modeling uncertainties, including parameter uncertainties and unmodeled disturbances, etc., and the con...

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): G05B13/04
CPCG05B13/042
Inventor 李旭东陈雄
Owner NANJING UNIV OF SCI & TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com