BEIJING: A Chinese commercial satellite has successfully completed a refueling test in low Earth orbit. During the test, the satellite utilized an octopus-like flexible robotic arm. The aim of this experiment is to enhance the lifespan and servicing capabilities of spacecraft around their orbits.
The satellite used for this test is named Youxing 306. According to Chinese media reports, the satellite was launched from Gansu province to low Earth orbit last week, and during the test, it employed its flexible robotic arm to carry out the refueling process.
This robotic arm is capable of maneuvering around tight and complex areas, bending, twisting, and gripping objects. Its tip, shaped like a nozzle, can be connected to a designated port on another satellite. The arm is constructed with multiple spring-like tubes equipped with motors that help extend wires and connect to various points.
Design and development of this robotic arm were carried out by experts from Tsinghua Shenzhen International Graduate School. It remains unclear whether the Youxing 306 was docked with another satellite specifically for refueling purposes.
In such operations, the satellite must dock with another satellite via a designated port to transfer fuel. Once connected, both satellites can orbit the Earth at speeds of approximately 27,000 kilometers per hour. Experts consider this a significant challenge akin to threading a needle in space, as even minor errors could jeopardize the entire process.
The research team meticulously designed the satellite and adjusted its control algorithms to address potential issues. Currently, the satellite is orbiting at an altitude of around 530 to 540 kilometers, circling between the North and South Poles.
Refueling in space satellites is an emerging technology aimed at extending the operational life of costly space infrastructure. Last year, China successfully docked the Shijian 25 satellite with the Shijian 21 satellite, marking a historic achievement. It was the first time a satellite located at an altitude of 36,000 kilometers was used to refuel another satellite, opening new possibilities for space servicing missions.
