Article | Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden | Non-linear Control of a Piezoelectric Two Stage Servovalve
Göm menyn

Title:
Non-linear Control of a Piezoelectric Two Stage Servovalve
Author:
Johan Persson: Department of Mechanical Engineering, University of Bath, Bath, United Kingdom Andrew Plummer: Department of Mechanical Engineering, University of Bath, Bath, United Kingdom Chris Bowen: Department of Mechanical Engineering, University of Bath, Bath, United Kingdom Phil Elliott: Moog Aircraft Group, Moog Controls, Ashchurch, Tewkesbury, United Kingdom
DOI:
10.3384/ecp17144310
Download:
Full text (pdf)
Year:
2017
Conference:
Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden
Issue:
144
Article no.:
031
Pages:
310-318
No. of pages:
9
Publication type:
Abstract and Fulltext
Published:
2017-12-20
ISBN:
978-91-7685-369-6
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


Export in BibTex, RIS or text

This paper describes an algorithm to control a two stage hydraulic servovalve designed for aerospace applications. The valve has a piezoelectric ring bender actuating a first stage spool with a significant amount of overlap to reduce internal leakage. The piezoelectric ring bender is a less complex and lighter alternative to a conventional torque motor. The second stage has electrical instead of the conventional mechanical feedback. The control algorithm includes compensation for the first stage spool overlap, piezoelectric hysteresis compensation and a feed forward term. The hysteresis compensation is based on a relatively simple Bouc-Wen hysteresis model that is able to significantly reduce the amount of first stage hysteresis. The overlap compensation, increasing the gain in the overlap region, reduces the impact of amplitude change and increases performance. It can also reduce any asymmetry in the system. The controller has a superior performance compared to a PI controller, as demonstrated experimentally using step and frequency responses.



Keywords: Piezoelectric actuator, two-stage servovalve, spool, hysteresis compensation.

Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden

Author:
Johan Persson, Andrew Plummer, Chris Bowen, Phil Elliott
Title:
Non-linear Control of a Piezoelectric Two Stage Servovalve
DOI:
http://dx.doi.org/10.3384/ecp17144310
References:
No references available

Proceedings of 15:th Scandinavian International Conference on Fluid Power, June 7-9, 2017, Linköping, Sweden

Author:
Johan Persson, Andrew Plummer, Chris Bowen, Phil Elliott
Title:
Non-linear Control of a Piezoelectric Two Stage Servovalve
DOI:
http://dx.doi.org/10.3384/ecp17144310
Note: the following are taken directly from CrossRef
Citations:
No citations available at the moment


Responsible for this page: Peter Berkesand
Last updated: 2017-02-21