旋梯训练过程多体动力学模拟

Multi-body dynamics simulation of swing ladder training process

对飞行员旋梯训练过程中系统机械能不断增长的现象从能量转换、做功及动量矩守恒3个角度做出定性分析。从多体动力学的角度,采用拉格朗日方法对旋梯系统进行建模,克服了现有分析方法中旋梯摆角应足够小的限制。仿真计算中,提出了更逼真的模拟人体重心升降的慢变模型。仿真结果验证了模型的正确性,很好地再现了旋梯训练的动力学过程。

For the phenomena of continuous increase with the total mechanical energy in the system during aviator＇s swing ladder training process, the qualitative analysis has been conducted from three viewpoints as energy conversion, doing work and conservation of momentum. The multi-l^dy dynamic equations of the swing lad- der system were formulated by using the Lagrange method, overco- ming the problem that the deviation angle should be sufficiently small in existing methods. A slowly varying model was established to simulate the position change of the body barycenter more realistic than before. The simulation results verify the model effective, and reappear the dynamics process of swing ladder training.