Containerless electrostatic levitation technology matched between the Chinese space station and ground: A comparative study and analysis of space-ground experiment

Abstract This paper presents the progress of containerless electrostatic levitation experiments conducted on the Chinese Space Station, alongside corresponding ground-based matching experiments. In space, the primary challenge lies in control issues. Due to the microgravity environment and the constraints of the space station, such as the electrostatic levitation furnace’s volume and automation, several innovative strategies have been implemented, including the use of optimization algorithms to bypass the sample charge inversion point. On the ground, both levitation and control challenges must be addressed. To address the issue of charge reversal points during levitation, an innovative method of preheating the sample has been adopted. This approach involves preheating the sample to a specific state before levitation, thereby mitigating the impact of the charge reversal point during the control process and ensuring the smooth execution of the experiment. This innovation offers a novel solution for ground-based electrostatic levitation experiments. Through a detailed analysis of the space and ground experimental conditions, the study explores the similarities and differences between the space-based and ground-based electrostatic levitation technologies. The findings aim to optimize ground-based matching experiments and provide valuable insights for future improvements to the electrostatic levitation furnace aboard the Chinese Space Station.