AVIC Xi'an Aircraft Industry Corporation applies for patents related to the shape-preserving assembly method; a Monte Carlo model predicts and helps promote high-precision assembly of major components.

April 2 News, the State Intellectual Property Office information shows that AVIC Xi’an Aircraft Industry Group Co., Ltd. has applied for a patent titled “High-Precision Assembly Part Shape Preservation Method Based on Monte Carlo Large Model Prediction.” The application publication number is CN121765856A, the application number is CN202511805061.X, the publication date is March 31, 2026, and the filing date is December 3, 2025. The inventors are Zhang Yinuo, Huang Xiaohua, Sun Jinle, and Zhang Yongze. The patent agency is China Aviation Patent Center, with patent agent Wen Huijuan. The classification numbers are G06F30/17, G06F30/20, G06N7/01, G06N5/04, G06N3/0455.

The patent abstract indicates that this invention relates to, but is not limited to, the field of large component assembly, specifically involving a high-precision assembly part shape preservation method based on Monte Carlo large model prediction. It includes: identifying multiple levels of sub-assemblies designed for specific product assembly; extracting the shape dimensions of each level of sub-assemblies; defining manufacturing tolerances after forming each level of sub-assemblies based on target shape dimensions and manufacturing process capabilities; dividing assembly processes based on process instructions for assembling each level into the finished assembly, and defining the tolerances of each assembly step as linearly related to the manufacturing tolerances of the corresponding level of formed sub-assemblies; constructing a Monte Carlo-based prediction model for fit tolerances, clarifying the contribution ranking of each assembly step’s tolerance to the overall product tolerance; performing random sampling of fit tolerance coefficients to obtain the optimal fit tolerance coefficients; and validating the prediction results through visualization models. If valid, the optimal solution is used as the implementation parameter to complete the assembly of the entire component.

AVIC Xi’an Aircraft Industry Group was established on June 18, 1997, and listed on the Shenzhen Stock Exchange on June 26, 1997. Its registered and office address is in Xi’an, Shaanxi Province. It is a major research and manufacturing base for large transport aircraft, bombers, and other complete aircraft in China, with strong capabilities in aerospace product R&D and manufacturing.

The main business of AVIC Xi’an covers the research, production, sales, maintenance, and services of military and civil aviation components such as large and medium-sized military aircraft, landing gear, and wheel brake systems. It also involves the production and sales of products related to transportation equipment industry, building materials industry, and other fields. The company’s industry classification is National Defense Military Industry - Aerospace Equipment II - Aerospace Equipment III, with concept sectors including AVIC Group, AVIC system, and Airbus concepts.

In 2025, AVIC Xi’an’s operating revenue reached 41.01B yuan, ranking third among 21 industry companies, behind AVIC Motor’s 46.33B yuan and AVIC Shenyang Aircraft’s 44.66B yuan, higher than the industry average of 11.47B yuan and median of 3.7B yuan. In main business, aerospace product revenue was 40.55B yuan, accounting for 98.86%. Net profit in 2025 was 1.15B yuan, also ranking third in the industry, lower than AVIC Shenyang Aircraft’s 3.54B and AVIC Avionics’ 1.34B, but higher than the industry average of 532 million and median of 252 million.

Recent patent information for AVIC Xi’an Aircraft Industry Group Co., Ltd.:

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