Gribble, J.J., Manness, M.A., and Murray-Smith, D.J. (1994) Helicopter flight control design: multivariable methods and design issues. In: Cook, M.V. and Rycroft, M.J. (eds.) Aerospace Vehicle Dynamics and Control. Series: Conference series (Institute of Mathematics and its Applications). New series (47). Clarendon Press, Oxford, pp. 199-224. ISBN 0198534736
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The paper summarises some findings of a comparative study of multivariable control law design methods undertaken at Glasgow University. The objective of the study was to assess the potential for achieving high agility and good handling qualities for rotorcraft in the context of active control technology. The paper concentrates on those design issues associated with the attributes of the plant which can be important when intrinsically multivariable methods are used. The design issues are open loop instability, high condition number of the plant at low frequencies, a high degree of inter-axis coupling and the effects of poorly modelled high frequency dynamics, in particular the rotor dynamics. The effects of these problems are illustrated using some of the methods considered in the study (LQR with explicit model following, H-2 and H-infinity optimal synthesis, characteristic locus design and a singular perturbation method) applied to a model of a typical combat rotorcraft.
|Item Type:||Book Section|
|Keywords:||multivariable control, helicopter, rotorcraft, active control|
|Glasgow Author(s):||Murray-Smith, Prof David|
|Authors:||Gribble, J.J., Manness, M.A., and Murray-Smith, D.J.|
|Subjects:||T Technology > TJ Mechanical engineering and machinery|
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TL Motor vehicles. Aeronautics. Astronautics
|College/School:||College of Science and Engineering > School of Engineering > Systems Power and Energy|