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Nonlinear Adaptive Control and Guidance for Unstart Recovery for a Generic Hypersonic Vehicle

Gunbatar, Yakup
http://rave.ohiolink.edu/etdc/view?acc_num=osu1406160002

Abstract Details

2014, Doctor of Philosophy, Ohio State University, Electrical and Computer Engineering.
This work presents the development of an integrated flight controller for a generic model of a hypersonic air-breathing vehicle. The flight control architecture comprises a guidance and trajectory planning module and a nonlinear inner-loop adaptive controller. The emphasis of the controller design is on achieving stable tracking of suitable reference trajectories in the presence of a specific engine fault (inlet unstart), in which sudden and drastic changes in the vehicle aerodynamics and engine performance occur. First, the equations of motion of the vehicle for a rigid body model, taking the rotation of the Earth into account, is provided. Aerodynamic forces and moments and engine data are provided in lookup-table format. This comprehensive model is used for simulations and verification of the control strategies. Then, a simplified control-oriented model is developed for the purpose of control design and stability analysis. The design of the guidance and nonlinear adaptive control algorithms is first carried out on a longitudinal version of the vehicle dynamics. The design is verified in a simulation study aiming at testing the robustness of the inner-loop controller under significant model uncertainty and engine failures. At the same time, the guidance system provides reference trajectories to maximize the vehicle's endurance, which is cast as an optimal control problem. The design is then extended to tackle the significantly more challenging case of the 6-degree-of-freedom (6-DOF) vehicle dynamics. For the full 6-DOF case, the adaptive nonlinear flight controller is tested on more challenging maneuvers, where values of the flight path and bank angles exceed the nominal range defined for the vehicle. Simulation studies show stable operation of the closed-loop system in nominal operating conditions, unstart conditions, and during transition from sustained scramjet propulsion to engine failure mode.
Andrea Serrani, Prof. (Advisor)
Umit Ozguner, Prof. (Committee Member)
Zhang Wei, Prof. (Committee Member)
175 p.
Aerospace Engineering; Computer Engineering; Electrical Engineering; Engineering
Hypersonic; unstart; adaptive control; nonlinear control; adaptive backstepping; trajectory optimization; optimal; tuning functions; longitudinal; 6-DOF; 3-DOF; Earth rotation; Control design model; coordinated turn; endurance; Equations of motion

Recommended Citations

Citations

  • Gunbatar, Y. (2014). Nonlinear Adaptive Control and Guidance for Unstart Recovery for a Generic Hypersonic Vehicle [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406160002

    APA Style (7th edition)

  • Gunbatar, Yakup. Nonlinear Adaptive Control and Guidance for Unstart Recovery for a Generic Hypersonic Vehicle. 2014. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1406160002.

    MLA Style (8th edition)

  • Gunbatar, Yakup. "Nonlinear Adaptive Control and Guidance for Unstart Recovery for a Generic Hypersonic Vehicle." Doctoral dissertation, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406160002

    Chicago Manual of Style (17th edition)

osu1406160002
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© 2014, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.