Application of Parameter-Dependent Robust Control Synthesis to Turbofan Engines
by
Gregory Wolodkin, Gary J. Balas, and William L. Garrard
in
JOURNAL OF GUIDANCE, CONTROL, AND DYNAMICS, Vol. 22, No. 6, November–December, 1999.
Category: Journal Article
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Abstract:
Recent results inmultivariable robust control synthesis for linear parameter-varying (LPV) systems are applied to the control of a turbofan engine over a wide range of power codes. Seven linear, time-invariant models are used in the control design. The resulting LPV controller consists of seven linear controllers, gain scheduled via linear interpolation. This gain-scheduled controller is obtained directly as part of the described design process, as opposed to conventional processes, where the gain schedules are developed after the fact to connect point designs. A model matching approach is employed such that the resulting closed loop resembles a decoupled set of secondorder systems with speciŽ ed rise times and overshoots. The performance of linearH1 point designs are compared with the LPV controller at Ž xed operating points. A nonlinear simulation is performed with the turbofan engine and LPV controller schedules as a function of the power code. The LPV controller exhibits excellent tracking of reference commands as the power code varies in time.
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