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

Full-state constrained control method for electro-hydraulic servo system based on extended state observer

An electro-hydraulic servo system and expansion state technology, applied in the field of control, to simplify the design of the controller, solve uncertain nonlinear problems, and reduce the effect of feedback gain

Active Publication Date: 2022-06-07
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, adaptive robust control has been applied to a variety of engineering practices. Although they have achieved excellent tracking performance, this high-precision control performance may be achieved through a large feedback gain.

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
  • Full-state constrained control method for electro-hydraulic servo system based on extended state observer
  • Full-state constrained control method for electro-hydraulic servo system based on extended state observer
  • Full-state constrained control method for electro-hydraulic servo system based on extended state observer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0206] In the simulation, the following parameters are taken to model the system: m=40kg, A=2×10 -4 m 2 , B=80N·s / m, β e =200Mpa, V 01 =1×10 -3 m 3 ,V 02 =1×10 -3 m 3 ,C t =9×10 -12 m 5 / Ns,K t =4×10 -8 m 4 / (s·A·),P s =7Mpa,P r =0Mpa. To verify the performance of the designed controller, the following two controllers were compared:

[0207] FSCESO: The full state constrained controller (FSCESO) based on extended state observer proposed in this chapter, the controller parameters are: k 1 =1000,k 2 =500,k 3 =200,ω 2 =500, ω 3 =500, b 1 =30, b 2 =9,b 3 =3, L 1 = 0.5, L 2 =5, L 3 =80, [θ 1n ,θ 2n ,θ 3n ,θ 4n ] T =[133,21.7,1.09×10 6 ,8] T .

[0208] PI: Proportional-integral controller, which is also widely used in industrial systems, especially systems where only the position signal is known, the controller parameter is k p =1500,k i =500.

[0209] The system command is x 1d =35arctan(sin(πt))[1-exp(-t)]+4mm, control law effect:

[0210] ...

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 provides a full-state constrained control method of an electro-hydraulic servo system based on an expanded state observer, comprising the following steps: step 1, establishing a servo system model of a double-rod hydraulic cylinder; step 2, designing an electro-hydraulic servo system based on an expanded state observer. A full-state constrained controller for the hydraulic servo system; step 3, adjust the parameters based on the control law to make the system meet the control performance index.

Description

technical field [0001] The invention relates to a control method, in particular to a full state constraint control method of an electro-hydraulic servo system based on an expanded state observer. Background technique [0002] The electro-hydraulic servo system has high control accuracy, high output power, flexible signal processing, and is easy to realize the feedback of various parameters. Therefore, it is most suitable for occasions with large load mass, and its application has been in various fields of national defense and industry. Designing high-performance controllers for hydraulic servo systems is not easy. Because designers are likely to encounter many model uncertainties, including unmodeled nonlinearities such as structural uncertainty (parametric uncertainty) and non-structural uncertainty. These uncertain factors can seriously deteriorate the achievable control performance, resulting in low control accuracy, limit cycle oscillations, and even instability. For k...

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): G05B13/04
CPCG05B13/042Y02P90/02
Inventor 徐张宝刘庆运胡晓磊孙船斌
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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