A compound control strategy for the digital valve based hydraulic position tracking system

Jian Wu*, Shoukun Wang, Junzheng Wang, Wen Xie

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Citations (Scopus)

Abstract

Digital valve based hydraulic system seems to be a potential alternative to the traditional servo system in industrial applications, where performance-price ratio and reliability are considered more important than control accuracy. Compared to servo and proportional valves, digital valve constituted by on/off valves is inexpensive and reliable, which is more suitable for equipment used in harsh environment such as rolling, forging and engineering machinery. This paper presents a compound control strategy for a digital valve based position tracking system, the idea is to use a cost function based open-loop control strategy as a feed-forward term to improve the accuracy of the position tracking system. It is shown that the presented strategy is feasible for low-frequency position tracking of the cylinder. Besides, simultaneous control of the velocity and downstream pressure is achieved using the compound control strategy. The tracking error is within 2mmwhen the frequency of the reference signal is 0.1 Hz, which is tolerable in low precision engineering applications.

Original languageEnglish
Title of host publicationProceedings of the 33rd Chinese Control Conference, CCC 2014
EditorsShengyuan Xu, Qianchuan Zhao
PublisherIEEE Computer Society
Pages7869-7873
Number of pages5
ISBN (Electronic)9789881563842
DOIs
Publication statusPublished - 11 Sept 2014
EventProceedings of the 33rd Chinese Control Conference, CCC 2014 - Nanjing, China
Duration: 28 Jul 201430 Jul 2014

Publication series

NameProceedings of the 33rd Chinese Control Conference, CCC 2014
ISSN (Print)1934-1768
ISSN (Electronic)2161-2927

Conference

ConferenceProceedings of the 33rd Chinese Control Conference, CCC 2014
Country/TerritoryChina
CityNanjing
Period28/07/1430/07/14

Keywords

  • compound control
  • cost-function
  • digital valve
  • feed-forward

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