ALFLEX is aimed at demonstrating unmanned automatic landing technology and evaluating low speed flight characteristics of a vehicle with the HOPE configuration. In these experiments, the experimental vehicle, a 37% subscale model of HOPE, is transported by a helicopter with hanging equipment to a predetermined release point at a height of 1,500 meters, and then released at a velocity of 45 meters per second (90 knots) to land automatically. Before releasing, the vehicle is supported at its center of gravity with gimbals to fly with five degree of freedom. This configuration, named constrained flight, enables the vehicle to be released with-out sudden transient motion. Furthermore, before the experiments, several constrained flight tests will be conducted to verify the control system's performance, and the aerodynamic characteristics will be pre-estimated by wind tunnel tests. This report describes a mathematical model of the ALFLEX constrained flight system and analysis of its dynamic characteristics.


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    ALFLEX Flight Simulation Analysis and Flight Testing

    Motoda, T. / Miyazawa, Y. / Ishikawa, K. et al. | British Library Conference Proceedings | 1998


    ALFLEX flight simulation analysis and flight testing

    Motoda, Toshikazu / Miyazawa, Yoshikazu / Ishikawa, Kazutoshi et al. | AIAA | 1998



    Automatic Landing Flight Experiment(ALFLEX) Project

    Nagayasu, M. / Nakayasu, H. / Japan Society for Aeronautical and Space Services et al. | British Library Conference Proceedings | 1997