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Adaptive control has the potential to improve performance and reliability in aircraft systems. Implementation of adaptive control on commercial and military aircraft requires verification and validation of the control sys-tem's robustness to modeling error, uncertainty, and time delay. Currently, there is a lack of tools available to rigorously analyze the(More)
— This paper provides an overview of the experimental flight test platform developed by the University of Minnesota Unmanned Aerial Vehicle Research Group. Key components of the current infrastructure are highlighted, including the flight test system, high-fidelity nonlinear simulations, software-and hardware-in-the-loop simulations, and the real-time(More)
This paper describes a practical and systematic procedure for modeling and identifying the flight dynamics of small, low-cost, fixed-wing uninhabited aerial vehicles (UAVs). The procedure is applied to the Ultra Stick 25e flight test vehicle of the University of Minnesota UAV flight control research group. The procedure hinges on a general model structure(More)
Adaptive control has the potential to improve performance and reliability in aircraft. Implementation of adaptive control on commercial and military aircraft requires verification and validation of the control system's robustness to modeling error, uncertainty, and time delay. Currently, there is a lack of tools available to rigorously analyze the(More)
A control analysis and design framework is proposed for systems subject to paramet-ric uncertainty. The underlying strategies are based on sum-of-squares (SOS) polynomial analysis and nonlinear optimization to design an optimally robust controller. The approach determines a maximum uncertainty range for which the closed-loop system satisfies a set of(More)
Reliability validation of safety-critical flight control systems requires accurate simulation models of aircraft. This paper proposes a simple approach to validate such models efficiently using flight data. A statistical model validation analysis is shown to be equivalent to a robust control analysis for simple linear systems. The analysis is extended to(More)
Low-cost actuators are equipped on small uninhabited aerial vehicle platforms to displace the control surfaces and maneuver the aircraft. The control laws, models, and even a complete description of the actuator output are typically unavailable from the manufacturer. This is a concern because many of these aircraft are used to perform flight control(More)
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