High-precision digital twinning butt joint assembling method for high-complexity and easy-to-deform aerospace cabin

Abstract

The invention relates to a high-precision digital twinning butt joint assembly method for a high-complexity and easy-to-deform aerospace cabin, and the method comprises the following steps: constructing a digital twinning model based on actual measurement data, and providing a model for butt joint of a multistage shaft hole and the aerospace cabin; realizing optimal assembly path planning in a digital space by utilizing a path optimization algorithm and simulation software simulation verification interaction; and according to the optimal assembly path, achieving virtual-real interaction control execution of the multi-stage shaft hole matching butt joint process by virtual-real real real-time interaction of the digital space and the physical space,so that butt joint assembly of the aerospace cabin is completed. The phenomena such as dislocation and jamming in the butt joint process of the multistage shaft hole matched easily-deformed cabin can be avoided, the one-time butt joint successrate is guaranteed, and the butt joint efficiency and precision are improved; and meanwhile, achieving assemblability prediction and optimal matching of batch multi-stage shaft hole matching easily-deformed aerospace cabin, the traditional trial assembly process is avoided so that overall assemblability and assembly performance of the aerospace cabin are improved.

Description

technical field [0001] The invention belongs to the field of digital twin docking assembly of aerospace cabins, and specifically provides a high-precision digital twin docking assembly method of large easily deformable aerospace cabins with multi-stage shaft holes and an optimal matching method for docking assembly of batch cabins. [0002] technical background [0003] In order to ensure the reliability and accuracy of the connection of aerospace products, solid rocket motors, super-large rockets and other aerospace products with high force and high precision requirements are designed as multi-stage shaft hole matching assembly interfaces, which improve Stress characteristics and product sealing performance, such as figure 1 shown. Due to the large size and weight of solid rocket motors and other aerospace cabins and thin-walled shells, the multi-step thin-walled positioning interface is prone to deformation during docking assembly. The schematic diagram of the deformation ...

AI Technical Summary

Problems solved by technology

Due to the large size and weight of solid rocket motors and other aerospace cabins and thin-walled shells, the multi-step thin-walled positioning interface is prone to deformation during docking assembly. The schematic diagram of the deformation is shown in Figure 2a ~ Figure 2c As shown, it poses a very high difficulty for the automatic docking assembly of the space capsule

The main reasons are: 1) Manufacturing errors and gravity deformation lead to irregular changes in the datum relationship between the multi-level steps. When only relying on the measurement of the outermost datum for docking, the internal precision fit steps will interfere, but the internal interference is not visible in the physical space. , unmeasurable, and high-precision blind matching is very prone to collision and interference. Only high-skilled workers rely on long-term experience and feeling to adjust slowly and carefully to complete the docking; 2) Compared with the design model, the spatial position and posture of multi-level steps Complex coupling deformation, the docking needs to meet the assembly requirements of 6 space variables for the position and attitude of each step at the same time, and the 3 steps need to meet 18 variable constraints at the same time, the docking path window is extremely narrow and extremely demanding under multiple constraints and high precision

3) After the multi-level stepped shaft holes are matched and deformed, the deformation may exceed the amount and the docking cannot be done. Even if the docking can be done, the gap may be too poor to make the quality unqualified. How to pre-determine the assemblability of batch products and predict their assembly performance is very difficult.

The above-mentioned documents are all aimed at the high-precision docking of general cabins, without considering the complexity caused by the deformation effect of multi-step shaft hole cooperation, and without optimizing the matching of batch cabins to improve their overall assemblability and overall assembly quality

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