Space robots are specialized robots used to replace humans in scientific experiments, extravehicular activities (EVAs), and space exploration. Replacing astronauts with space robots during EVAs can significantly reduce risks and costs.
I. Characteristics of Space Robots
Space robots operate in a space environment, which is very different from the ground environment. Space robots work in environments with microgravity, high vacuum, ultra-low temperature, strong radiation, and poor lighting. Therefore, the requirements for space robots are necessarily different from those for ground robots, and space robots have their own characteristics.
First, space robots are relatively small in size, lightweight, and have strong anti-interference capabilities.
Secondly, space robots are highly intelligent and have a wide range of functions. They need to consume as little energy as possible, have the longest possible lifespan, and, because they operate in the unique environment of space, their reliability requirements are also very high.
Furthermore, space robots move and navigate autonomously in a constantly changing three-dimensional environment. Since space robots can hardly remain stationary in space, it is essential to be able to determine their position and status in space in real time; control their vertical movement; and predict and plan their interplanetary flight paths.
II. Applications of Space Robots
1. Spatial Architecture and Assembly
Large installation components, such as radio antennas, solar panels, and the assembly of various modules, rely heavily on space robots for extravehicular activities. Robots will handle tasks such as various material handling operations, connecting and securing components, and dealing with toxic or hazardous materials. In the near future, robots will complete more than half of the initial construction work on the man-made space station.
2. Maintenance and repair of satellites and other spacecraft
As human activities in space continue to develop, humanity's "assets" in space are also increasing, with artificial satellites making up the vast majority. If these satellites malfunction, discarding them and launching new ones is uneconomical; they must be repaired and put back into service. However, sending astronauts to repair them involves extravehicular activities (EVAs), and because spacecraft are exposed to intense cosmic radiation in space, humans are unable to perform these tasks. Therefore, robots are the only option. Space robots perform maintenance and repair work such as recovering malfunctioning satellites, repairing faulty satellites on-site, and resupplying spacecraft.
3. Space production and scientific experiments
Outer space provides humanity with a microgravity and high-vacuum environment unattainable on Earth, allowing for the production of products that are impossible or difficult to manufacture on Earth. Scientific experiments that cannot be conducted on Earth can also be carried out in space. Unlike space assembly and repair, space production and scientific experiments primarily take place within the cabin environment, and the operations are mostly repetitive. In most cases, astronauts can directly inspect and control these processes. Space robots in this context function much like production lines in factories on Earth. Therefore, the robots that can be used are mostly general-purpose, multi-functional robots. Space robots will play a significant role in ensuring the safety of space activities, improving production efficiency and economic benefits, and expanding the role of space stations.
