Robust control of a yaw-pitch gimballed seeker

Robust control of a yaw-pitch gimballed seeker Purpose – This paper aims to present a robust design approach to realize disturbance attenuation for a yaw – pitch gimballed system subject to actuator saturation and disturbances. Design/methodology/approach – To minimize the impacts of disturbances in the presence of saturation nonlinearity and acquire desired response performance, the control approach is of double closed-loop configuration. State feedback controllers are synthesized via convex optimization and used to stabilize the inner loops; robust controllers are synthesized via mixed H ∞ optimization and used to stabilize the outer loops. Findings – It is shown through performance simulations that the proposed control scheme is effective in terms of command following, stability and disturbance attenuation. Practical implications – The presented robust control approach provides a theoretical method to facilitate designing a stable servo control loop for a yaw – pitch gimballed seeker. Originality/value – This paper supplies an effective way of addressing stabilization problem induced from actuator saturation and system uncertainties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology: An International Journal Emerald Publishing

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/AEAT-12-2012-0258
Publisher site
See Article on Publisher Site

Abstract

Purpose – This paper aims to present a robust design approach to realize disturbance attenuation for a yaw – pitch gimballed system subject to actuator saturation and disturbances. Design/methodology/approach – To minimize the impacts of disturbances in the presence of saturation nonlinearity and acquire desired response performance, the control approach is of double closed-loop configuration. State feedback controllers are synthesized via convex optimization and used to stabilize the inner loops; robust controllers are synthesized via mixed H ∞ optimization and used to stabilize the outer loops. Findings – It is shown through performance simulations that the proposed control scheme is effective in terms of command following, stability and disturbance attenuation. Practical implications – The presented robust control approach provides a theoretical method to facilitate designing a stable servo control loop for a yaw – pitch gimballed seeker. Originality/value – This paper supplies an effective way of addressing stabilization problem induced from actuator saturation and system uncertainties.

Journal

Aircraft Engineering and Aerospace Technology: An International JournalEmerald Publishing

Published: Jan 5, 2015

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