Research on multi-degree-of-freedom microgravity simulation deployment test system based on suspension method and air flotation method

In order to meet the requirements of multi-dimensional, multi-degree-of-freedom, high-precision deployment trajectory and high unloading efficiency in the ground-based microgravity simulation deployment test of the three-dimensional space unfolding robotic arm, a multi-degree-of-freedom microgravity simulation deployment test system based on suspension method and air floatation method is designed through analyzing and summarizing the current microgravity simulation deployment test methods. Firstly, the structural design and principle analysis of the designed multi-degree-of-freedom microgravity simulation deployment test system was carried out. Then, the multi-degree-of-freedom microgravity simulation deployment test system was applied to a three-dimensional trajectory microgravity simulation deployment test of a three-dimensional space unfolding robotic arm. The results indicated that deploying process of the three-dimensional space unfolding robotic arm was stable and reliable, and the the air floatation friction resistance, the vertical resistance fluctuation and the additional resistance in the deployment direction generated by the microgravity simulation deployment test system to the robotic arm were small, and the unloading efficiency was higher than 95%, which met the requirements of high precision and high unloading efficiency. The research result can provide reference for the in-depth study of ground simulation deployment test system for multi-degree-of-freedom space unfolding mechanisms.