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Title: The limitation of the closed-loop combination method
Authors: Wong, YK
Fung, EHK
Liu, HHT
Li, YC
Keywords: Aircraft control
Closed loop systems
Linear systems
Military aircraft
Nonlinear control systems
Poles and zeros
Transfer functions
Issue Date: 2005
Publisher: IEEE
Source: Proceedings of 2005 IEEE Conference on Control Applications, 2005 : CCA 2005, 28-31 August 2005, Toronto, Ont., p. 693-698 How to cite?
Abstract: Modern aircraft include a variety of automatic control systems that aid the flight in navigation, flight management, and to augmenting the stability characteristics of airplane. In order to reduce cost and design cycling time and improve performance, Liu proposed closed-loop combination approaches in 2001. In this paper, we discuss the method again and apply the close-loop combination technique to the longitudinal control channels of the nonlinear F-16 fighter. We conclude that the closed-loop combination method cannot be applied in nonlinear F-16 system since the design of closed-loop combination controller does fully depend on the closed-loop transfer function and its minimal pole-zero cancellation form of the system, and in nonlinear system there are some unstable states that cannot be accurately cancelled due to the differences between linear model and nonlinear model. The simulation results are presented to show this limitation of the closed-loop combination method
ISBN: 0-7803-9354-6
DOI: 10.1109/CCA.2005.1507208
Appears in Collections:Conference Paper

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