Adaptive Backstepping Impact Angle Guidance Law Accounting for Autopilot Lag
Publication: Journal of Aerospace Engineering
Volume 30, Issue 3
Abstract
This paper presents a robust impact angle guidance law for maneuvering target interception with autopilot dynamics compensation based on a systematic backstepping control technique. Since the future course of action of the target, an independent entity, cannot be predicted beforehand, an adaptive-control approach is introduced in guidance law derivation. In order to address the problem of explosion of terms caused by analytic differentiation of the virtual control laws in the standard backstepping method, a tracking differentiator is adopted as an alternative way to obtain the derivatives of the virtual control laws. Stability analysis shows that both the line-of-sight angular rate and impact angle error can be stabilized in a small region around zero asymptotically. Simulation results explicitly show that accurate interception is achieved with a wide range of impact angles.
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Acknowledgments
This work was supported by the Natural Science Foundation of China (Grant No. 61172182).
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Information & Authors
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Published In
Journal of Aerospace Engineering
Volume 30 • Issue 3 • May 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Aug 2, 2015
Accepted: Aug 10, 2016
Published online: Oct 27, 2016
Discussion open until: Mar 27, 2017
Published in print: May 1, 2017
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