月球着陆器模型参数修正

建立了着陆器的参数化模型,把着陆碰撞过程简化为弹簧阻尼模型,将其中的刚度、阻尼、非线性指数和最大穿透深度作为修正参数;定义了判断着陆器是否翻倒的着陆稳定性平面.基于地面稳定性试验结果,利用ADAMS和Isight软件联合仿真,采用优化拉丁方试验设计缩小修正参数范围.基于模型修正理论,采用自适应模拟退火算法进行模型参数修正,修正效果明显,修正后的仿真模型更符合实际试验样机.

Model parameters updating of lunar lander

The parametric model of the lander was established, and the landing collision process was simplified as a spring-damper model. Parameters including stiffness, damping, force exponent and the maximum penetration depth were set to be updated. Landing stability plane was defined to determine whether the lander was overturned. Based on the ground stability experimental results, ADAMS and Isight were used to make co-simulation, and optimized super Latin square method was adopted to narrow the range of the updated parameters. Based on the model updating theory, adaptive simulated annealing method was adopted to the model parameters updating. It is proven that the effect of collection is obvious and the updated simulation model conforms better to the actual experimental prototype.