This paper presents a summary of a series of recent analytical studies conducted to investigate One-Engine-Inoperative (OEI) optimal control strategies and the associated optimal trajectories for a twin engine helicopter in Category-A terminal-area operations. These studies also examine the associated heliport size requirements and the maximum gross weight capability of the helicopter. Using an eight states, two controls, augmented point-mass model representative of the study helicopter, Continued TakeOff (CTO), Rejected TakeOff (RTO), Balked Landing (BL), and Continued Landing (CL) are investigated for both Vertical-TakeOff-and-Landing (VTOL) and Short-TakeOff-and-Landing (STOL) terminal-area operations. The formulation of the nonlinear optimal control problems with considerations for realistic constraints, solution methods for the two-point boundary-value problem, a new real-time generation method for the optimal OEI trajectories, and the main results of this series of trajectory optimization studies are presented. In particular, a new balanced- weight concept for determining the takeoff decision point for VTOL Category-A operations is proposed, extending the balanced-field length concept used for STOL operations.


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    Titel :

    Optimal Trajectories for the Helicopter in One-Engine-Inoperative Terminal-Area Operations


    Beteiligte:
    Y. Zhao (Autor:in) / R. T. N. Chen (Autor:in)

    Erscheinungsdatum :

    1996


    Format / Umfang :

    34 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch






    Optimal Trajectories for the Helicopter in One-Engine-Inoperative Terminal-Area Operations

    Chen, R. T. N. / Zhao, Y. / Advisory Group for Aerospace Research and Development; Flight Vehicle Integration Panel | British Library Conference Proceedings | 1997