Command following control law design by linear quadratic optimisation

Gribble, J.J. and Murray-Smith, D.J. (1990) Command following control law design by linear quadratic optimisation. In: European Rotorcraft Forum, Glasgow, 1990, III.5.3.1-III.5.3.14.

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This paper presents a control law design for a linearised model of a Lynx-like helicopter in the 80 knots forward flight condition, with respect to an appropriate subset of the published handling qualities requirements. The synthesis method used was the Linear Quadratic Regulator (LQR) version of model following. The design is based principally on the rigid body quasi-steady-state rotor model, although a simplified representation of the actuator and blade flapping dynamics as pure delays is used to motivate the choice of the LQR input weighting matrix. The design assumes that all of the rigid body states can be measured. State estimation of actuator and rotor states is not used. The design is evaluated using a linear model which includes representation of the actuator and blade flapping dynamics.

Item Type:Conference Proceedings
Keywords:Helicopter, flight control, linear quadratic optimisation, LQR
Glasgow Author(s) Enlighten ID:Murray-Smith, Professor David
Authors: Gribble, J.J., 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

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