直升机计及诱速分布和挥扭耦合在侧风下的稳定性和操纵性

 旋翼诱速分布不均匀对无铰旋翼直升机的操稳特性是很得要的。文献1]研究了计及挥扭耦合在涡流诱速场中的无铰直升机的稳定性分析,比较了诱速不均匀和挥扭耦合对稳定性的影响。本文除了应用文献2]中的诱速不均匀分布以外,还计及了在侧风情况下的挥扭弹性变形耦合对稳定性和操纵性的影响。本文亦考虑了桨叶气动力中心、弹性轴位置和垂心沿展向的分布。

THE INDUCED VELOCITY DISTRIBUTION AND THE FLAP- PITCH-TORSION COUPLING ON THE STABILITY AND CONTROL OF THE HELICOPTER IN FLIGHT CONDITION WITH LATERAL VELOCITY

A method is given for the calculation of stability and control of a hclicopctr in flight condition with lateral velocity. The rotory wing dynamic model considered is the model of flap-pitch (including the clastic deformation of control system) -torsion coupling. The induced velocity distribution derived by generalized voricx theory is taken into account. Excepting the influence of the lateral velocity on the stability and control, the c.g-a.c-e.c offset, Wade control system stiffness and blade forsional stiffness on the stability and control arc also considered.