重装空投多刚体系统动力学建模与仿真

Dynamics modeling and simulation of heavy-equipment airdrop multi-body system

针对目前重装空投数学建模方法复杂、假设条件苛刻、模型与实际偏差较大等问题,基于多刚体动力学的拉格朗日方法和飞行力学建立了重装空投货物出舱阶段的多刚体系统动力学模型。基于动力学仿真软件ADAMS和三维建模软件CATIA建立了重装空投动力学仿真模型,并在相同的条件下对两种模型进行了仿真对比分析。结果表明,该数学模型建立方法简单、假设条件宽泛,能够准确描述货物出舱过程中载机和货物的实时位置和姿态以及牵引伞的拉力,具有较高的通用性。

Nowadays, there are still several problems on modeling of heavy-equipment airdrop, such as the complex modeling methods, the strict assumed conditions, and the model usually has big deviation with the actual situations. The multi-body system dynamic model of the heavy-equipment airdrop is built based on the Lagrange method and the flight dynamics in this paper and at the same time the simulation model is built based on ADAMS and CATIA. Then the two models are simulated at the same conditions, the results show that this mathematical model is easy to build and the assumed methods are broad, the model can describe the real time positions and attitudes of the carrier and the cargo, and has high versatility.