舱外航天服动力学模型

A Dynamic Model of the Extravehicuar Activity Space Suit.

目的根据舱外航天服的实际结构 ,建立舱外航天服的简化的动力学模型。方法考虑舱外航天服的各部分的质量、惯量、各关节活动性能以及航天服施加给航天员的服装力矩 ,对舱外航天服各部分几何形状进行了简化 ,并给出了计算航天服各部分惯量的公式。采用经典Preisach模型定量地描述了航天服服装力矩迟滞曲线特性。结果得到了考虑质量、惯量以及服装力矩的舱外航天服动力学模型。

Objective To establish a dynamic model of the space suit base on the particular configuration of the space suit. Method The mass of the space suit components, moment of inertia, mobility of the joints of space suit, as well as the suit generated torques, were considered in this model. The expressions to calculate the moment of inertia were developed by simplifying the geometry of the space suit. A modified Preisach model was used to mathematically describe the hysteretic torque characteristics of joints in a pressurized space suit, and it was implemented numerically basing on the observed suit parameters. Result A dynamic model considering mass, moment of inertia and suit generated torques was established. Conclusion This dynamic model provides some elements for the dynamic simulation of the astronaut extravehicular activity.