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本文研究了无铰旋翼直升机在侧风下的稳定性和操纵件。旋翼动力学模型采取挥舞-变距(包括操纵系统的弹性变形)-扭转耦合的模型,桨盘诱速模型采用广义涡流理论所导出的诱速分布。推出的表达式除适用于研究侧风的影响外,还可以进一步研究剖面质心、气动力中心,弹性轴位置、操纵系统刚度和桨叶剖面扭转刚度对直升机稳定性和操纵性的影响。 本文以某典型直升机为例,详细考虑了诱速分布、挥扭耦合和侧风对直升机稳定性和操纵性的影响,计算结果和试飞数据有较好的一致。
In this paper, the stability and manipulator of a hinging rotor helicopter under crosswind are studied. The rotor dynamics model takes the wielding-pitch (including the elastic deformation of the control system) -two torsional coupling model, and the paddle velocity model uses the velocity distribution induced by the generalized eddy current theory. In addition to studying the effects of crosswinds, the expressions introduced can further study the effect of cross-section centroid, aerodynamic center, elastic axis position, stiffness of control system, and torsional stiffness of blade profile on helicopter stability and maneuverability. In this paper, taking a typical helicopter as an example, the influence of velocity distribution, torsional coupling and crosswind on helicopter stability and maneuverability is considered in detail. The calculated results are in good agreement with the test data.