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http://dx.doi.org/10.5302/J.ICROS.2009.15.1.037

A Robust Longitudinal Landing Controller to Datalink Time Delay  

Lee, Sang-Hyo (서울대학교 기계항공공학부)
Rhee, Ihn-Seok (한국기술교육대학교 메카트로닉스공학부)
Kee, Chang-Don (서울대학교 기계항공공학부)
Koo, Hueon-Joon (국방과학연구소)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.15, no.1, 2009 , pp. 37-43 More about this Journal
Abstract
This paper deals with designing a ground-based longitudinal landing controller which is robust to datalink time delays. Time delays occur because forward velocity measurements are downlinked and the controller output commands are uplinked. An $H_{\infty}$ controller was designed by using the input/output decomposition where time delay is modeled as a first-order system with Pade approximation. Linear simulations show that the system tracks well the predefined path and is robust to the variation of time delay.
Keywords
datalink time delay; flare; $H_{\infty}$; longitudinal landing controller;
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