L1 augmentation configuration for a lateral/directional manoeuvre of a hypersonic glider in the presence of uncertainties

Sanchito Banerjee, Tristan Vanyai, Zhongjie Wang, Bernhard Baur, Florian Holzapfel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

A lateral/directional manoeuvre methodology of a hypersonic glider is presented. The aerodynamics is based on NASA's Generic Hypersonic Aerodynamics Model Example. The glider weighs 93.1kg with a planform area of 0.78m2, characteristic length of 0.512m and a reference length of 1.99m. The control methodology used to carry out a pulsed bank manoeuvre of 25° deg is presented. A dynamic pole placement controller is implemented to carry out this manoeuvre. The side slip angle controller is implemented to maintain the angle at 0° deg. These controllers are augmented with an L1 adaptive controller to cancel out the matched uncertainties. The sources of uncertainties are reduced control surface effectiveness, aerodynamic uncertainties and control surface failure. The lateral dynamics are considered in this paper. While the vehicle is descending, a pulsed bank manoeuvres carried out with the help of the roll angle controller and the side slip angle controller is presented. Both the pole placement controllers for the lateral/directional dynamics are Single Input-Single Output (SISO) systems. The fundamental difference between the baseline and the augmented dynamic pole placement controller with the L1 adaptive augmentation are presented in terms of robust stability and robust performance. With the help of 25-run Monte Carlo simulation the performance and the robustness of the baseline controller are presented. The baseline roll angle controller and the baseline side slip angle controller show good tracking. The baseline controller exhibits degradation in the performance in the presence of uncertainties. The augmentation configuration is able to improve the performance of the baseline controllers significantly. This is outlined with the help of the tracking error norm, ||ep||L2.

Original languageEnglish
Title of host publicationAIAA AVIATION 2014 -19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102844
DOIs
StatePublished - 2014
EventAIAA AVIATION 2014 -19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference 2014 - Atlanta, GA, United States
Duration: 16 Jun 201420 Jun 2014

Publication series

NameAIAA AVIATION 2014 -19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference

Conference

ConferenceAIAA AVIATION 2014 -19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference 2014
Country/TerritoryUnited States
CityAtlanta, GA
Period16/06/1420/06/14

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