A typical low-level wind shear of thunderstorm activates long periodic oscillation of an aircraft, causing tracking deviation of the aircraft.
典型尺度的雷暴低空风切变以长周期振动频率激励飞机，使其偏离预计下滑航迹。
2
The blade of a large horizontal axis wind turbine is a nonlinear periodic multi-body system with fluid-rigid-flexible coupling.
大型水平轴风力发电机桨叶为流-刚-柔耦合的周期时变多体系统。
3
On the assumption that the wind shear is sinusoidal, the effects of long periodic oscillation on the landing path of an aircraft were studied by computer calculation and with flight simulator.