研究了空投系统的出舱阶段中货台与地板接触模型,采用动力学分析方法建立了统一的出舱运动模型。根据试验设计条件开展系统仿真计算,结果与试验数据基本一致。探讨了货台离机过程对离机后俯仰姿态的影响。使用离机时间评价出舱过程对货台空投精确度的影响, 得到了无量纲离机时间的简化算法以方便工程应用;引入了安全距离参数来评价出舱过程安全性,分析了牵引比、质心位置系数和空投时飞机姿态与离机时间和安全距离的关系,为空投系统中货台布局和牵引伞设计等提供了参考依据。 The model of contact between the goods platform and the floor in the stage of cabin exit of the airdrop system was studied. A unified model of cabin movement was established by dynamic analysis. According to the experimental design conditions, the system simulation is carried out. The results are in good agreement with the experimental data. The effect of off-machine process on pitching pitch attitude is discussed. The off time was used to evaluate the influence of cabin process on the accuracy of airdrop. The simplified algorithm of dimensionless off time was obtained to facilitate the engineering application. The safety distance parameter was introduced to evaluate the safety of cabin process. The relationship between the centroid position coefficient and attitude of the aircraft during airdrop and the departure time and safety distance provides a reference for the layout of the cargo platform and the design of the towing umbrella in the airdrop system.