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Control of open-loop neutrally stable systems subject to actuator saturation and external disturbances


Xu Wang, School of Electrical Engineering and Computer Science, Washington State University, Pullman, WA 99164-2752, USA.



In this paper, we study the disturbance response of open-loop neutrally stable linear systems with saturating linear feedback controller. It is shown that the closed-loop states remain bounded if the disturbances consists of those signals that do not have large sustained frequency components corresponding to the system's eigenvalues on the imaginary axis (continuous-time) or on the unit circle (discrete-time). Copyright © 2011 John Wiley & Sons, Ltd.