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Dynamic modelling and open-loop control of a twin rotor multi-input multi-output system

Dynamic modelling and open-loop control of a twin rotor multi-input multi-output system
Dynamic modelling and open-loop control of a twin rotor multi-input multi-output system
A dynamic model for a one-degree-of-freedom (DOF) twin rotor multi-input multi-output (MIMO) system (TRMS) in hover is obtained using a black-box system identification technique. The behaviour of the TRMS in certain aspects resembles that of a helicopter; hence, it is an interesting identification and control problem. This paper investigates modelling and open-loop control of the longitudinal axis alone, while the lateral axis movement is physically constrained. It is argued that some aspects of the modelling approach presented are suitable for a class of new generation or innovative air vehicles with complex dynamics. The extracted model is employed for designing and implementing a feedforward/open-loop control. Open-loop control is often the preliminary step for development of more complex feedback control laws. Open-loop control strategies using shaped command inputs are accordingly investigated for resonance suppression in the TRMS. Digital low-pass and band-stop filter shaped inputs are used on the TRMS testbed, based on the identified vibrational modes. A comparative performance study is carried out and the corresponding results presented. The low-pass filter is shown to result in better vibration reduction.
helicopter, system identification, twin rotor MIMO system, open-loop control, vibration suppression
0959-6518
477-496
Ahmad, S.M.
676dbe06-3934-463c-8ba4-e44a98bf0d43
Chipperfield, A.J.
524269cd-5f30-4356-92d4-891c14c09340
Tokhi, M.O.
e5d7c236-781f-4aa6-9fab-c3db3154149b
Ahmad, S.M.
676dbe06-3934-463c-8ba4-e44a98bf0d43
Chipperfield, A.J.
524269cd-5f30-4356-92d4-891c14c09340
Tokhi, M.O.
e5d7c236-781f-4aa6-9fab-c3db3154149b

Ahmad, S.M., Chipperfield, A.J. and Tokhi, M.O. (2002) Dynamic modelling and open-loop control of a twin rotor multi-input multi-output system. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 216 (6), 477-496.

Record type: Article

Abstract

A dynamic model for a one-degree-of-freedom (DOF) twin rotor multi-input multi-output (MIMO) system (TRMS) in hover is obtained using a black-box system identification technique. The behaviour of the TRMS in certain aspects resembles that of a helicopter; hence, it is an interesting identification and control problem. This paper investigates modelling and open-loop control of the longitudinal axis alone, while the lateral axis movement is physically constrained. It is argued that some aspects of the modelling approach presented are suitable for a class of new generation or innovative air vehicles with complex dynamics. The extracted model is employed for designing and implementing a feedforward/open-loop control. Open-loop control is often the preliminary step for development of more complex feedback control laws. Open-loop control strategies using shaped command inputs are accordingly investigated for resonance suppression in the TRMS. Digital low-pass and band-stop filter shaped inputs are used on the TRMS testbed, based on the identified vibrational modes. A comparative performance study is carried out and the corresponding results presented. The low-pass filter is shown to result in better vibration reduction.

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More information

Published date: 2002
Keywords: helicopter, system identification, twin rotor MIMO system, open-loop control, vibration suppression

Identifiers

Local EPrints ID: 22252
URI: http://eprints.soton.ac.uk/id/eprint/22252
ISSN: 0959-6518
PURE UUID: 715ac2b2-013e-4343-9a8d-a1f81b9bb306
ORCID for A.J. Chipperfield: ORCID iD orcid.org/0000-0002-3026-9890

Catalogue record

Date deposited: 22 Mar 2006
Last modified: 19 Nov 2019 01:49

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Contributors

Author: S.M. Ahmad
Author: M.O. Tokhi

University divisions

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