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Title: Force control of semi-active valve lag dampers for vibration reduction in helicopters
Authors: Morales, Rafael Mauricio
Turner, M. C.
Court, P.
Hilditch, R.
Postlethwaite, I.
First Published: 27-Feb-2014
Publisher: Institution of Engineering and Technology (IET)
Citation: IET Control Theory and Applications, 2014, 8 (6), pp. 409-419 (11)
Abstract: This study considers the design of a closed-loop force-tracking system for a semi-active damper, designed to be used to reduce in-plane vibrations caused by helicopter rotor blades during steady-state forward flight conditions. The study describes the development of the control law and includes details of (i) how the initial mathematical model of the system is adapted for controller design; (ii) how a non-linear dynamic inversion (NDI) control law is modified into a form suitable for implementation; and (iii) how the free parameters in the NDI controller can be optimised for various different operational modes. The success of the approach is demonstrated through both force-tracking simulations and also more comprehensive tests in which the controller is incorporated into a large-scale vibration simulation of the AgustaWestland 101 helicopter. The results show that the NDI-based controller can provide a satisfactory level of performance and hence greatly assist in the reduction of unwanted vibrations.
DOI Link: 10.1049/iet-cta.2012.0397
ISSN: 1751-8644
eISSN: 1751-8652
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © The Institution of Engineering and Technology 2014. This paper is a postprint of a paper submitted to and accepted for publication in IET Control Theory & Applications and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library
Appears in Collections:Published Articles, Dept. of Engineering

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