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Dissertation_Turki_Alsuwian __final format approved LW 11-19-.2018.pdf (11.16 MB)
ETD Abstract Container
Abstract Header
Comparative Analysis of Flight Control Designs for Hypersonic Vehicles at Subsonic Speeds
Author Info
Alsuwian, Turki Mohammed
ORCID® Identifier
http://orcid.org/0000-0001-9579-9115
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543828056218447
Abstract Details
Year and Degree
2018, Doctor of Philosophy (Ph.D.), University of Dayton, Electrical Engineering.
Abstract
Hypersonic vehicles are complex nonlinear systems with uncertain dynamics. Multiple designs of control systems for hypersonic vehicles based on nonlinear dynamic models have been applied with simulation results under high aircraft speed and altitude conditions. In contrast, the main contribution of this work is the design of three control systems: proportional-integral-derivative (PID), feedback linearization (FL, also known as dynamic inversion), and adaptive control (AC) for the flight operations of these vehicles at subsonic speeds and low altitude conditions. The complexity of the aerodynamic system is considered in the design of each control approach, in order to address robustness issues. The hypersonic vehicle model considered in this work has a v-tail and elevons, which makes the development of its flight control system more challenging to design. The longitudinal and lateral aerodynamics are decoupled as a means to control vehicle under specific flight conditions. Therefore, this work is focused on both longitudinal and lateral aerodynamics. The longitudinal aerodynamics (three degrees of freedom, or 3 DOF), which are divided into two subsystems: forward speed and flight-path angle. Two cases are considered for the lateral aerodynamics: fixed roll angle (5 DOF), and full stability analysis (6 DOF). The 5 DOF lateral aerodynamics are divided into three subsystems, for forward speed, flight path angle, and yaw angle, and the 6 DOF case includes a fourth subsystem for roll angle. Longitudinal and lateral aerodynamics contain uncertain parameters of three forces (drag, lift, and lateral) and three moments (pitch, roll, and yaw); further, the design of different control systems is necessary in order to achieve robust control and reduce the uncertainties. Different control design methodologies are implemented to provide asymptotic tracking of a desired forward speed (
V
des
), desired flight-path angle (
γ
des
), desired roll angle (
φ
des
), and desired yaw angle (
ψ
des
). The control approaches are compared in terms of longitudinal and lateral climbing flights and several performance measures, such as robustness. Based on the stability analysis, the FL and AC techniques are performed utilizing a Lyapunov function candidate of feedback closed-loop system. The simulation results of longitudinal and lateral aerodynamics determine the range of flight stability that is possible for this hypersonic vehicle model. Additionally, the simulation results for each control technique demonstrate the effectiveness of flight control inputs.
Committee
Raul Ordonez, Ph.D. (Advisor)
Pages
210 p.
Subject Headings
Aerospace Engineering
;
Electrical Engineering
Keywords
Hypersonic Vehicle
;
Adaptive Control
;
Flight Control
;
Subsonic Speed
;
Control Design
;
Recommended Citations
Refworks
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Citations
Alsuwian, T. M. (2018).
Comparative Analysis of Flight Control Designs for Hypersonic Vehicles at Subsonic Speeds
[Doctoral dissertation, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543828056218447
APA Style (7th edition)
Alsuwian, Turki .
Comparative Analysis of Flight Control Designs for Hypersonic Vehicles at Subsonic Speeds.
2018. University of Dayton, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543828056218447.
MLA Style (8th edition)
Alsuwian, Turki . "Comparative Analysis of Flight Control Designs for Hypersonic Vehicles at Subsonic Speeds." Doctoral dissertation, University of Dayton, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543828056218447
Chicago Manual of Style (17th edition)
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Document number:
dayton1543828056218447
Download Count:
485
Copyright Info
© 2018, all rights reserved.
This open access ETD is published by University of Dayton and OhioLINK.