Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles
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University of Cincinnati / OhioLINK
2014
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397468045 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ucin13974680452021-08-03T06:23:49Z Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles Vick, Tyler J. Aerospace Materials Hypersonic Vehicle Adaptive Control Geometry Modeling Modeling and Simulation Model Reference Linear Quadratic Regulator Air-breathing hypersonic vehicles have the potential to provide global reach and affordable access to space. Recent technological advancements have made scramjet-powered flight achievable, as evidenced by the successes of the X-43A and X-51A flight test programs over the last decade. Air-breathing hypersonic vehicles present unique modeling and control challenges in large part due to the fact that scramjet propulsion systems are highly integrated into the airframe, resulting in strongly coupled and often unstable dynamics. Additionally, the extreme flight conditions and inability to test fully integrated vehicle systems larger than X-51 before flight leads to inherent uncertainty in hypersonic flight.This thesis presents a means to design vehicle geometries, simulate vehicle dynamics, and develop and analyze control systems for hypersonic vehicles. First, a software tool for generating three-dimensional watertight vehicle surface meshes from simple design parameters is developed. These surface meshes are compatible with existing vehicle analysis tools, with which databases of aerodynamic and propulsive forces and moments can be constructed. A six-degree-of-freedom nonlinear dynamics simulation model which incorporates this data is presented.Inner-loop longitudinal and lateral control systems are designed and analyzed utilizing the simulation model. The first is an output feedback proportional-integral linear controller designed using linear quadratic regulator techniques. The second is a model reference adaptive controller (MRAC) which augments this baseline linear controller with an adaptive element. The performance and robustness of each controller are analyzed through simulated time responses to angle-of-attack and bank angle commands, while various uncertainties are introduced. The MRAC architecture enables the controller to adapt in a nonlinear fashion to deviations from the desired response, allowing for improved tracking performance, stability, and robustness. 2014-10-27 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397468045 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397468045 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
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NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Aerospace Materials Hypersonic Vehicle Adaptive Control Geometry Modeling Modeling and Simulation Model Reference Linear Quadratic Regulator |
| spellingShingle |
Aerospace Materials Hypersonic Vehicle Adaptive Control Geometry Modeling Modeling and Simulation Model Reference Linear Quadratic Regulator Vick, Tyler J. Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles |
| author |
Vick, Tyler J. |
| author_facet |
Vick, Tyler J. |
| author_sort |
Vick, Tyler J. |
| title |
Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles |
| title_short |
Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles |
| title_full |
Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles |
| title_fullStr |
Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles |
| title_full_unstemmed |
Geometry Modeling and Adaptive Control of Air-Breathing Hypersonic Vehicles |
| title_sort |
geometry modeling and adaptive control of air-breathing hypersonic vehicles |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2014 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1397468045 |
| work_keys_str_mv |
AT vicktylerj geometrymodelingandadaptivecontrolofairbreathinghypersonicvehicles |
| _version_ |
1719436144061448192 |