Summary of Key Points
Shanghai Jiao Tong University, in collaboration with seven organizations including Jiangnan Shipbuilding and Shanghai Aerospace, spent over a decade developing a “high-efficiency docking and assembly technology for large components.” This breakthrough has solved the extremely challenging problem of aligning giant components (hundreds of meters long and tens of thousands of tons in weight) with millimeter-level precision in the shipbuilding and aerospace industries. The innovation won the Special Prize for Technological Invention at the 2025 Shanghai Science and Technology Awards. This technology enables machines to automatically “observe, calculate, and adjust,” significantly improving the efficiency of shipbuilding and rocket assembly processes. It has the potential to be applied in other high-end manufacturing fields, such as commercial rockets, thus supporting China’s strategies to become a “marine powerhouse” and a “spacepower.”
Detailed Explanation
1. What makes this problem so challenging? – Aligning components hundreds of meters long and tens of thousands of tons in weight with precision equal to that of a coin
Shipbuilding and rocket manufacturing are moving towards larger-scale components: for example, the main sections of advanced ships can be hundreds of meters long and weigh nearly ten thousand tons, and rocket modules are also massive. However, the alignment must be precise to within millimeters—equivalent to ensuring that when the entire Shanghai Grand Theatre is lifted and lowered, its position deviation does not exceed the thickness of a coin (about 1.8 millimeters).
In the past, the industry relied on experienced craftsmen making trial and error adjustments by visual inspection and manual adjustment, which was not only slow but also prone to errors, significantly delaying production timelines and affecting accuracy.
2. Three core technologies enabling machines to “observe, calculate, and adjust”
The team developed an intelligent docking system with three key breakthroughs:
- Providing a precise reference for positioning adjustments: The alignment of large components requires the coordinated operation of multiple robotic arms, but even small errors in their movements can be amplified, causing misalignment. The team established a new theoretical framework to eliminate redundant error factors, significantly improving the precision of the robotic arms, essentially giving them “precise navigation.”
- Locating tiny targets on a large surface: The docking surfaces for ship sections are as large as basketball courts, but the actual docking points are only the size of a fingernail. The team used 3D scanning to convert these large areas into countless precise points and developed a docking command system that can quickly determine the optimal alignment positions.
- Mitigating deformation issues: Large components may deform under stress, leading to misalignment. The team created a model that can detect deformation in real time and automatically adjust the robotic arms’ positions to correct errors, ensuring accurate docking even when the components are not perfectly aligned.
3. Practical benefits of the technology
The implementation of this technology has brought tangible improvements:
- Increased shipbuilding efficiency: By using modular construction methods (similar to building with blocks), systems such as piping and electrical installations can be installed in advance, reducing the need to wait until the hull is complete. This parallel approach shortens construction times, lowers costs, and simplifies supply chain management.
- Faster rocket assembly: The new technology has been applied to the docking of rocket modules, reducing launch preparation time and enabling the handling of nearly a hundred launches per year.
- Shift in manufacturing methodology: The transition from manual trial and error to intelligent, automated docking represents a shift from low-efficiency, low-precision methods to high-efficiency, high-precision processes in high-end manufacturing.
4. Future prospects: From shipbuilding and aerospace to other high-end industries
This technology, with its fully proprietary intellectual property rights, can be extended to the following areas:
- Commercial rockets: Commercial rockets require cost reduction and efficiency improvement, making this technology particularly useful.
- Other high-end equipment: It can also be applied in large wind turbines, marine engineering equipment, and other applications involving the docking of large components.
- National strategies: It provides critical technical support for China’s goals of becoming a “marine powerhouse” and a “spacepower,” reducing reliance on foreign technologies and avoiding potential bottlenecks.
In summary, this technology has addressed the crucial issue of accurately and quickly assembling large components, enhancing the competitiveness of China’s shipbuilding and aerospace industries while laying the foundation for the intelligent transformation of high-end manufacturing processes.