In the rendezvous and docking mission of the Shenzhou series spacecraft and the Tiangong-1, in order to meet the electrical signal transmission needs after the two spacecraft are docked. It is necessary to design a mechanism that can correct and compensate for the angle and position deviations between the two aircraft during the docking process of the two aircraft, meet the plugging and separation requirements of electrical connection pins and jacks, and finally realize circuit connection. The space high-precision circuit floating connection mechanism solves design problems such as deviation correction, space environment adaptability, and small insertion and insertion force through innovative design, and finally achieves high-precision connection of 4×55 circuit contacts.
Through the interaction between the steel ball and the spring pressure plate, the space high-precision circuit floating connection mechanism can correct and compensate for the lateral Φ6mm and the full cone angle of 1.6° between the two spacecraft, ensuring that the active and passive mechanism power connector pins and jacks can be inserted smoothly to meet the needs of circuit connection. Previously, there was no similar institution in the domestic aerospace field.
The electrical connector on the high-precision circuit floating connection mechanism in space solves the problem of adaptability to the space environment of the extravehicular electrical connector by optimizing polyetherimide material and multi-core electrical connector small insertion force control technology, and at the same time enables the 55-core electrical connector The insertion force in high and low temperature environments is less than 85N, which is one-fifth of that of products of the same specification, solving the problem of small insertion force of high-precision circuit floating connection mechanisms in extravehicular space environment and meeting space rendezvous and docking mission requirements.
Its main technical characteristics and innovation points are as follows:

1. An adaptive device technology for spatial circuit connection deviation compensation is proposed, which solves the problem of displacement and angle deviation correction and compensation between active and passive connectors during the docking process, and achieves high-precision connection of 4×55 circuit contacts. This deviation compensation adaptive device relies on steel balls and spring pressure plates to float. It has a simple structure and high reliability, making it the first in China.
2. Through optimization, polyetherimide (PEI) insulating material was applied to the external connector of the space capsule, which solved the problem of adaptability to the environment outside the space capsule and achieved reliable connection of circuits after docking of two space spacecraft. Through the analysis of the characteristics of polyetherimide (PEI) material, it was directly exposed to the space environment as an electrical connector insulating material. It was verified that the material can meet the use requirements.
3. Propose a small insertion force control technology for multi-core electrical connectors. The insertion force is only one-fifth of that of existing electrical connectors of the same specification, solving the problem of increasing the insertion force caused by different expansion coefficients between non-metals and metals in high and low temperature environments.
   Space high-precision circuit floating connection technology is used to establish a circuit connection during the docking process of two aircraft and is a key technology for the docking mechanism. During the manned space rendezvous and docking mission between Tiangong-1 and Shenzhou-8, 9 and 10, the circuit connection between Tiangong-1 and the Shenzhou spacecraft was successfully established, and the product performance was stable and the operation was reliable.
   Space high-precision circuit floating connection technology has broad application prospects in establishing circuit connection between two space vehicles. It will be subsequently used in aerospace models such as cargo spacecraft and space stations. It also has broad application prospects in aerospace pre-research projects such as exposed load platforms, on-orbit filling, and robotic arms. In order to meet the working environment requirements of the space station for long-term on-orbit, further research on its long-term on-orbit storage will be carried out in the future.