航天员舱外活动安全绳虚拟现实操作仿真方法研究

Study on Simulation Methods of Safety Rope Operation in Virtual Reality during Astronaut Extravehicular Activity

为了解决航天员舱外活动虚拟现实训练仿真中安全绳的逼真仿真问题,分析了安全绳的结构组成和神七任务航天员出舱过程微重力下的安全绳变形规律,对安全绳采用质点-直线弹簧-弯曲弹簧模型建模,使用基于位置的仿真方法计算了安全绳的变形,给出了安全绳的仿真参数,建立了航天员舱外活动安全绳操作仿真系统。开展了受试者试验,仿真结果表明,仿真方法实时有效,可为航天员虚拟现实舱外维修仿真提供基础算法。

To realize better simulation of the safety rope during the astronaut extravehicular activity(EVA)training in virtual reality(VR),the structure of the safety rope and the mechanical characteristics of the safety rope deformation during SZ-7 EVA in microgravity were analyzed.The mass-linear spring-bending spring model was established and the position-based simulation method was used to calculate the model.The parameters of simulated rope were given and the values of the parameters were validated by experiments.The results showed that the simulation method was effective.It may provide a basic algorithm for the simulation of astronaut EVA maintenance training in VR.