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

Position Tracking Control Method of Electro-hydraulic Servo System Considering Input Time Delay Constraints

An electro-hydraulic servo system, tracking control technology, applied in the direction of program control, computer control, general control system, etc., can solve the problem of few non-linear system control strategies

Active Publication Date: 2021-06-08
NANJING UNIV OF SCI & TECH
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of control strategies have been proposed for the control of time-delay systems with known models, but few control strategies for uncertain nonlinear systems with time-delays

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
  • Position Tracking Control Method of Electro-hydraulic Servo System Considering Input Time Delay Constraints
  • Position Tracking Control Method of Electro-hydraulic Servo System Considering Input Time Delay Constraints
  • Position Tracking Control Method of Electro-hydraulic Servo System Considering Input Time Delay Constraints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0099] In order to assess the performance of the designed controller, the parameters in Table 1 are taken in the simulation to model the electro-hydraulic servo system:

[0100] Simulation parameters of electro-hydraulic servo system

[0101]

[0102] Build the system simulation model in MATLAB / Simulink. The simulation step size is set to 0.0005s. The sampling time is 30 seconds. By building a system model for Simulink and applying MATLAB to add the control law to the controller, the parameters in the controller are selected as follows: k 1 =4000,k 2 =1000,k 3 =20,k r =2.

[0103] According to different system working conditions, the simulation process is divided into three parts:

[0104] ①Low speed and small time lag

[0105] Specify the desired position output command of the electro-hydraulic servo system as: x d (t)=0.03sin(0.2πt)[1-exp(-0.01t 3 )]m, at this time it is a low-speed working condition, the specified time lag is 5ms, and the comparison before and ...

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 position tracking control method of an electro-hydraulic servo system considering input time-delay constraints. The method includes: establishing a mathematical model of the electro-hydraulic servo system; designing a controller considering input time-delay constraints; The stability is proved theoretically, and the result that the system has bounded and stable position tracking performance and all signals of the system are bounded is obtained. The present invention obtains an open-loop error system without input time-delay by referencing an input time-delay compensation signal in the controller, and combines the Lyapunov-Krasovsky functional method to eliminate the influence of time-delay; the present invention The invention effectively solves the problem that the input time lag constraint affects the performance of the system in the actual electro-hydraulic servo system, and can obtain better high-precision position tracking performance.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic servo control, and mainly relates to a position tracking control method of an electro-hydraulic servo system considering input time lag constraints. Background technique [0002] With the continuous development of automation and precision in modern industry, the high-performance requirements for transmission systems also follow, and this demand is becoming more and more intense in various industrial fields. Due to its outstanding advantages such as fast response, high precision, convenient maintenance, high transmission efficiency, and convenient energy acquisition, electro-hydraulic servo systems are widely used in various important fields such as robots, machine tools, and aerospace, and gradually occupy a dominant position. With the continuous improvement of servo performance requirements for electro-hydraulic servo systems such as tracking accuracy, dynamic bandwidth, and ultra-low-s...

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 Patents(China)
IPC IPC(8): G05B19/401
CPCG05B19/401G05B2219/37604
Inventor 沈炅乐贵高姚建勇
Owner NANJING UNIV OF SCI & TECH
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