The mathematical model of reentry maneuvering trajectory is established. The fitting expression of aerodynamic coefficient function on velocity, attack of Angle and altitude is presented.

建立了再入机动弹道数学模型，给出了气动力系数为速度、迎角、高度的函数拟合式，进行了最佳再入机动弹道设计和仿真计算。

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Finally, the dissertation designed the fuzzy PD controller of trajectory tracking, which is combined with attitude Angle controller, so that the whole flight controller is completed.

本文最后设计了直升机模糊pd轨迹跟踪控制器，与姿态角控制器相结合，完成对整个飞行控制系统的设计。

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Its dynamic characteristics involved with speed and altitude, the influence of the inclined Angle of the trajectory plane and load on it are also calculated and analyzed in this paper.

推导了斜筋斗计算公式，并计算分析了其速度、高度特性，及轨迹平面倾斜角、过载对斜筋斗的影响，计算结果与理论分析一致。

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But the angle of its economic trajectory has dropped.

ECONOMIST: India��s economy

Sensors at the midway point of the table detect the angle, speed, and trajectory of the not-exactly-oncoming puck, and instructs the mechanism how and where to fire the disc -- you slap it back, and the same sequence happens on your compadre's end.

ENGADGET: Airhockey Over a Distance

In an extraordinary scene, Mr Boyce demonstrated that the angle of the round's trajectory meant the weapon must have been pointed at an awkward angle for someone intending to shoot himself.

BBC: Huddersfield soldier Wilson 'over drink-drive limit'