研究了全球卫星定位系统（ GPS）自动归航系统在恒定风场中归航轨迹的计算，探讨了系统能够达到预定目标点的条件，给出系统在几种变化风场中的轨迹图。
This paper analyses the trajectory of GPS automatics homing system in constant wind fields , and discusses the condition under which the gliding parachute system could reach preassigned location.
求算了巷道风温恒定时岩体壁面温度、岩体与空气的非稳态热交换系数和围岩调热圈厚度。
The temperature of tunnel wall, coefficient of unsteady heat exchange and thickness of heat-adjusting layer at constant air temperature in a tunnel are calculated.
为此，设计了大攻角旋转天平支撑系统，此系统可测定飞机模型在不同姿态角下绕风轴以一系列恒定的角速率旋转时的气动特性。
The paper has introduced design of the support system for rotary balance of high attack angle, and the importance and methods of studying spin of aircraft.
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