前飞旋翼叶片传递函数的拉普拉斯域近似

IF 1.4 4区 工程技术 Q2 ENGINEERING, AEROSPACE Aeronautical Journal Pub Date : 2002-04-01 DOI:10.1017/S0001924000012045
F. Nitzsche
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引用次数: 6

摘要

摘要提出了一种基于经典Hill行列式分析的连续频域方法来近似线性周期系统的时变特性。该方法对前飞时变旋翼叶片气动弹性问题的定常等效形式的推导特别有用。该方法将固定翼飞机的闭环控制方法推广到旋翼飞机。首先通过求解Mathieu方程对该方法进行了验证。其次,在拉普拉斯域中求解了前飞非定常不可压缩空气动力下旋转梁的两自由度(襟翼弯曲和扭转)问题。作为该方法的验证,得到了s平面上沿梁施加的突然且均匀分布的输入压力扰动与考虑的两个弹性自由度在一组局部截面上的输出响应之间的传递函数。
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Laplace-domain approximation to the transfer functions of a rotor blade in forward flight
Abstract A continuous frequency domain method with roots on the classic Hill’s determinant analysis is presented to approximate the time-varying characteristics of a linear periodic system. The method is particularly useful to derive a time-invariant equivalent form of the time-varying aeroelastic problem of a rotor blade in forward flight. The proposed technique allows methodology usually employed in fixed wing aircraft to obtain closed-loop control laws be extended to rotary wings. The method is first validated solving Mathieu’s equation. Next, the two-degree-of-freedom (flap bending and torsion) problem of rotating beam subject to unsteady and incompressible aerodynamics in forward flight is solved in the laplace domain. As a demonstration of the proposed method, the transfer functions in the ‘s’ plane between a sudden and uniformly distributed input pressure perturbation applied along the beam and the output response of the two elastic degrees of freedom considered are obtained at a set of local sections.
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来源期刊
Aeronautical Journal
Aeronautical Journal 工程技术-工程:宇航
CiteScore
3.70
自引率
14.30%
发文量
86
审稿时长
6-12 weeks
期刊介绍: The Aeronautical Journal contains original papers on all aspects of research, design and development, construction and operation of aircraft and space vehicles. Papers are therefore solicited on all aspects of research, design and development, construction and operation of aircraft and space vehicles. Papers are also welcomed which review, comprehensively, the results of recent research developments in any of the above topics.
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