Abstract:
To study the risk of space particles entering the space station from astronauts’ extra vehicular activities (EVA) , a method of charging space particles through plasma and trapping them by electrostatic field precipitation (EFP) was proposed. Firstly, the charging and trapping mechanisms of space particles were analyzed, and the front-end particle charge was calculated. Then, the Deutsch trapping efficiency model was introduced to simulate the key parameters such as wind speed, structure, and excitation voltage, which might affect the trapping efficiency of EFP module, and the parameter design of the EFP module was determined. Finally, the EFP module processed according to the design parameters was verified by experiments. It is shown that the trapping efficiency of the module can reach up to 85%, which meets the demand for sub-efficient filtration and removal of space particles. The proposed research may provide a reference for the further development of space particle removal device.