Journal ArticleDOI
Computational Aerodynamic Modeling Tools for Aircraft Loss of Control
Neal T. Frink,Patrick C. Murphy,Harold L. Atkins,Sally A. Viken,Justin L. Petrilli,Ashok Gopalarathnam,Ryan C. Paul +6 more
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TLDR
The status of ongoing NASA research supported over the past eight years to advance computational capabilities for modeling civil aircraft loss of control due to airframe damage or wing stall is summarized in this article.Abstract:
This paper summarizes the status of ongoing NASA research supported over the past eight years to advance computational capabilities for modeling civil aircraft loss of control due to airframe damage or wing stall The research is motivated by a desire to exploit the capabilities of computational methods to create augmented flight simulation models that improve pilot training for such loss-of-control scenarios Flight of aircraft with either airframe damage or operating near and beyond the stall boundary encounters additional nonlinear aerodynamic influences on stability and control from dynamic motions that, if not included in flight simulation models, may lead to incorrect pilot responses In the present work, both low- and high-fidelity computational methods are explored for analyzing such nonlinearities The challenge of creating nonlinear reduced-order models from high-fidelity computational data is also addressed At the beginning, few guidelines were available for computing or modeling the dynamic sread more
Citations
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Journal ArticleDOI
Nonlinear robust adaptive control of an airplane with structural damage
TL;DR: This paper investigates the design of a novel nonlinear L1 adaptive control architecture to stabilize and control an aircraft with structural damage and results clearly represent the excellent overall performance of the designed controller.
Journal ArticleDOI
Piecewise Polynomial Modeling for Control and Analysis of Aircraft Dynamics Beyond Stall
TL;DR: HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not, for teaching and research institutions in France or abroad, or from public or private research centers.
Proceedings ArticleDOI
Improved Stall Prediction for Swept Wings Using Low-Order Aerodynamics.
TL;DR: In this article, the authors explored the use of modified lift curves for the sections of swept wings, with modifications derived from analysis of RANS computational results, and the results indicated that the strip-theory approach is still applicable for swept wings provided the effect of spanwise redistribution of flow separation is correctly taken into consideration.
Proceedings ArticleDOI
Investigation of Reduced-Order Modeling for Aircraft Stability and Control Prediction
TL;DR: In this paper, a surrogate-based, indicial response reduced-order model methodology is proposed to efficiently augment a flight simulator database with high-fidelity nonlinear aerodynamic damping derivatives.
Non-linear Analysis and Control Proposal for In-flight Loss-of-control
TL;DR: In this paper, the authors sketch an analysis of an aircraft's flight envelope in terms of its trim conditions and propose control approaches both within and outside the envelope, using state-of-the-art methods such as continuation theory and reachability estimation.
References
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Journal ArticleDOI
Computational Investigation into the Use of Response Functions for Aerodynamic-Load Modeling
TL;DR: The results show that the ROMs can accurately model the unsteady loads in response to slow and fast pitch and plunge motions by comparison of the model output with time-accurate CFD simulations.
Proceedings ArticleDOI
NASA Langley's AirSTAR Testbed: A Subscale Flight Test Capability for Flight Dynamics and Control System Experiments
Thomas L. Jordan,Roger M. Bailey +1 more
TL;DR: A comprehensive overview of the development of the AirSTAR testbed is given, which encompasses the hardware and software infrastructure necessary to provide comprehensive support services for conducting flight research using the subscale aircraft.
Journal ArticleDOI
Integrated Computational/Experimental Approach to Unmanned Combat Air Vehicle Stability and Control Estimation
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Journal ArticleDOI
Comparison of Adaptive Sampling Methods for Generation of Surrogate Aerodynamic Models
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Flow Physics Analyses of a Generic Unmanned Combat Aerial Vehicle Configuration
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