American Institute of Aeronautics and Astronautics
Recent results in multivariable 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 second-order systems with specified rise times and overshoots. The performance of linear H point designs are compared with the LPV controller at fixed 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.
Wolodkin, G., Balas, G. J., and Garrard, W. L. (1999). "Application of Parameter-Dependent Robust Control Synthesis to Turbofan Engines." Journal of Guidance, Control, and Dynamics. 22(6), 833-838.
Reprinted with permission of the American Institute of Aeronautics and Astronautics, Inc. See http://www.aiaa.org/content.cfm?pageid=2 for more information.
Wolodkin, Gregory; Balas, Gary J.; Garrard, William L..
Application of Parameter-Dependent Robust Control Synthesis to Turbofan Engines.
American Institute of Aeronautics and Astronautics.
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