嫦娥五号返回器降落伞回收动力学建模与分析

Dynamic Modeling and Analysis of Chang’e-5 Parachute Deceleration System

针对探月三期嫦娥五号返回器理论落区范围大造成的回收搜索困难问题,建立返回器回收着陆段高保真动力学模型并结合空投试验进行了模型验证,利用该模型对嫦娥五号回收任务中返回器开伞后飞行轨迹的偏差特性进行了分析,结果表明,利用该模型可以实现对返回器飞行轨迹偏差范围的精准计算,有助于缩小返回器搜救范围,缩短搜救时间。

To solve the searching problem of Chang’e-5 return capsule caused by the large theoretical landing area in the third phase of China Lunar Exploration Program,a high fidelity dynamic model of the capsule parachute system is established and verified with the airdrop test.The model is used to analyze the deviation characteristics of the reentry trajectory after parachute opening.Results show that the model can be used to accurately calculate the flight trajectory deviation range of the return capsule,which can help reduce the search scope and shorten the search time.