Flight-Test Results of Autonomous Airplane Transitions Between Steady-Level and Hovering Flight
| Autor: | Allen D. Wu, Eric N. Johnson, Michael A. Turbe, James C. Neidhoefer, Suresh K. Kannan |
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| Rok vydání: | 2008 |
| Předmět: |
Engineering
business.product_category business.industry Applied Mathematics Aerospace Engineering Flight control surfaces Flight simulator Slow flight Flight test Fly-by-wire Airplane Flight envelope Space and Planetary Science Control and Systems Engineering Control theory Electrical and Electronic Engineering business Flight control modes |
| Zdroj: | Journal of Guidance, Control, and Dynamics. 31:358-370 |
| ISSN: | 1533-3884 0731-5090 |
| DOI: | 10.2514/1.29261 |
| Popis: | Linear systems can be used to adequately model and control an aircraft in either ideal steady-level flight or in ideal hovering flight However, constructing a single unified system capable of adequately modeling or controlling an airplane in steady-level flight and in hovering flight, as well as during the highly nonlinear transitions between the two, requires the use of more complex systems, such as scheduled-linear, nonlinear, or stable adaptive systems. This paper discusses the use of dynamic inversion with real-time neural network adaptation as a means to provide a single adaptive controller capable of controlling a fixed-wing unmanned aircraft system in all three flight phases: steady-level flight, hovering flight, and the transitions between them. Having a single controller that can achieve and transition between steady-level and hovering flight allows utilization of the entire low-speed flight envelope, even beyond stall conditions. This method is applied to the GTEdge, an eight-foot wingspan, fixed-wing unmanned aircraft system that has been fully instrumented for autonomous flight. This paper presents data from actual flight-test experiments in which the airplane transitions from high-speed, steady-level flight into a hovering condition and then back again. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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