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  • Spacecraft Design, Testing and Performance  (2)
  • Cybernetics, Artificial Intelligence and Robotics; Aircraft Stability and Control  (1)
  • 1
    Publication Date: 2019-07-20
    Description: We present a robust initialization scheme that estimates parameter values for the numerical solution of a two-point boundary value problem. The two-point boundary value problem formulation stems from the optimization of a cost functional subject to the dynamics of a simplified lateral aircraft model and other constraints. Leveraging regular perturbation methods, initial parameter estimates are analytically determined and used to initialize a gradient descent optimization routine which is shown to rapidly converge over a range of initial aircraft positions and heading angles. Additionally, the velocity of the aircraft is optimized to ensure the trajectory of the aircraft terminates within a desired region in both time and space.
    Keywords: Cybernetics, Artificial Intelligence and Robotics; Aircraft Stability and Control
    Type: ARC-E-DAA-TN5446 , InfoTech @ Aerospace Conference 2012; Jun 19, 2012 - Jun 21, 2012; Garden Grove, CA; United States
    Format: application/pdf
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  • 2
    Publication Date: 2020-01-08
    Description: No abstract available
    Keywords: Spacecraft Design, Testing and Performance
    Type: ARC-E-DAA-TN75918 , Asia-Pacific Regional Space Agency Forum; Nov 26, 2019 - Nov 29, 2019; Nagoya; Japan
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  • 3
    Publication Date: 2019-07-12
    Description: Synchronized Position Hold, Engage, Reorient, Experimental Satellites (SPHERES) are bowling-ball sized satellites that provide a test bed for development and research into multi-body formation flying, multi-spacecraft control algorithms, and free-flying physical and material science investigations. Up to three self-contained free-flying satellites can fly within the cabin of the International Space Station (ISS), performing flight formations, testing of control algorithms or as a platform for investigations requiring this unique free-flying test environment. Each satellite is a self-contained unit with power, propulsion, computers, navigation equipment, and provides physical and electrical connections (via standardized expansion ports) for Principal Investigator (PI) provided hardware and sensors.
    Keywords: Spacecraft Design, Testing and Performance
    Type: NASA FS-2013-08-02-ARC , ARC-E-DAA-TN10763
    Format: application/pdf
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