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    Optimal City-Center Takeoff Operation of Tiltrotor Aircraft in One Engine Failure

    Source: Journal of Aerospace Engineering:;2004:;Volume ( 017 ):;issue: 001
    Author:
    Eric B. Carlson
    ,
    Yiyuan J. Zhao
    DOI: 10.1061/(ASCE)0893-1321(2004)17:1(26)
    Publisher: American Society of Civil Engineers
    Abstract: This paper investigates optimal tiltrotor flight trajectories and performance in vertical takeoff operations from a city-center heliport considering the possibility of one engine failure. A two-dimensional longitudinal rigid body model of a tiltrotor aircraft is used. Tiltrotor flights after engine failure in both continued takeoff and rejected takeoff are formulated as nonlinear optimal control problems that minimize the heliport size, subject to various constraints from safety considerations and tiltrotor performance limitations. These problems are parametrized via collocation into parameter optimization for numerical solutions. Extensive numerical solutions are obtained, and sensitivity analyses are conducted to examine effects of model parameter uncertainties. Optimization results indicate that the maximum gross weight capability of a tiltrotor in a vertical operation is determined by the need for safe landing in the event of a single engine failure. The height at which the decision for either continuing or rejecting the takeoff is made depends on the need to maintain sufficient height during the continued takeoff flight after an engine failure.
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      Optimal City-Center Takeoff Operation of Tiltrotor Aircraft in One Engine Failure

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    http://yetl.yabesh.ir/yetl1/handle/yetl/44997
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    contributor authorEric B. Carlson
    contributor authorYiyuan J. Zhao
    date accessioned2017-05-08T21:16:09Z
    date available2017-05-08T21:16:09Z
    date copyrightJanuary 2004
    date issued2004
    identifier other%28asce%290893-1321%282004%2917%3A1%2826%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/44997
    description abstractThis paper investigates optimal tiltrotor flight trajectories and performance in vertical takeoff operations from a city-center heliport considering the possibility of one engine failure. A two-dimensional longitudinal rigid body model of a tiltrotor aircraft is used. Tiltrotor flights after engine failure in both continued takeoff and rejected takeoff are formulated as nonlinear optimal control problems that minimize the heliport size, subject to various constraints from safety considerations and tiltrotor performance limitations. These problems are parametrized via collocation into parameter optimization for numerical solutions. Extensive numerical solutions are obtained, and sensitivity analyses are conducted to examine effects of model parameter uncertainties. Optimization results indicate that the maximum gross weight capability of a tiltrotor in a vertical operation is determined by the need for safe landing in the event of a single engine failure. The height at which the decision for either continuing or rejecting the takeoff is made depends on the need to maintain sufficient height during the continued takeoff flight after an engine failure.
    publisherAmerican Society of Civil Engineers
    titleOptimal City-Center Takeoff Operation of Tiltrotor Aircraft in One Engine Failure
    typeJournal Paper
    journal volume17
    journal issue1
    journal titleJournal of Aerospace Engineering
    identifier doi10.1061/(ASCE)0893-1321(2004)17:1(26)
    treeJournal of Aerospace Engineering:;2004:;Volume ( 017 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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