增强装配工艺信息模型驱动的空间展开机构混合现实辅助装配

The assembly process of large-scale space deployable mechanism is complicated. Currently, the assembly process is documented. The technical requirements, bill of material(BOM), operation instructions, etc. of each process are arranged independently. The process information in the paper document is described in natural language, having shortcomings such as information redundancy and abstract, which leads to understanding deviation for different people. With increasing higher requirement for satellite customization and manufacturing cycle, the traditional assembly operation mode exposes disadvantages. To solve the above problems, an assembly guidance method driven by augmented assembly process information model assisted by mixed reality is proposed. First, the augmented assembly process information model is constructed, which integrates static data such as text, assembly animation and holographic model, and dynamic data such as measurement and monitoring readings during the assembly process. Secondly, a high-efficiency process authoring method for MR-assisted assembly is proposed, which seamlessly connects the assembly process planning and the MR-assisted assembly system. Thirdly, the interoperability between MR device and the on-site measurement equipment such as laser tracer, intelligent torque wrench, data acquisition instrumentations, etc. is established. The interoperability enables to integrates measurement steps into the assembly process and fee back the measurement results in time to workers. This “assembly-measurement-adjustment” closed-loop process enables correct assembly errors in time and reduce rework. Finally, the above technologies are integrated into the developed MR-assisted assembly guidance system, which is verified at the assembly site of a large-scale space deployable mechanism. The results show that the proposed method and the developed MR-assisted assembly system are able to alleviate cognitive load, reduce rework, and improve the assembly efficiency and quality of satellite products.