Research on vacuum cold welding resistant technology of connector for extravehicular operation by astronaut

The connector for extravehicular operation by astronauts is a key component for repairing devices in the space station. The paper studies mechanism of the vacuum cold welding phenomenon of the connector, analyzes its threats to the connector, provides appropriate measures for preventing vacuum cold welding and verifies these measures through experiment. The results indicate that the connector does not occur vacuum cold welding phenomenon during the experiment and the above measures are effective. Therefore, the study is important and significant for ensuring the long-term and reliable operation of the connector in the space station.