运输机空投货物建模与任务性能影响因素研究

Study of transport aircraft cargo airdrop modeling and mission performance influence factors

针对当前运输机空投货物模型可拓展性不强的问题,提出了分离体的建模方法。在无需分析货物与飞机整体质心变化的情况下,分别以货物和飞机为对象进行受力分析,推导了货物与飞机之间的相互作用力,建立了更加贴近实际的运输机单件货物空投和连续空投的动力学模型。最后,通过数值仿真,分析了飞行速度和牵引伞牵引比对空投任务性能的影响。结果表明,飞行速度和牵引比越大,飞机在货物干扰作用下的状态变化量越小。

For the poor expanding property of the current transport aircraft cargo airdrop model, the sepa- ration body modeling method is established. The forces of the aircraft and cargo are analyzed respective- ly. The dynamic model of the transport aircraft single airdrop as well as the continuous airdrop process is derived, and the overall center of gravity of the aircraft and cargo is not required to be known. The influ- ences of the aircraft speed and traction ratio on the airdrop mission performance are analyzed via the simu- lation results. It can be concluded that the higher the aircraft speed and traction ratio, the smaller the disturbances that the cargo impacts on the aircraft.