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An Autonomous Mobile Measurement Method for Key Feature Points in Complex Aircraft Assembly Scenes
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An Autonomous Mobile Measurement Method for Key Feature Points in Complex Aircraft Assembly Scenes
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An Autonomous Mobile Measurement Method for Key Feature Points in Complex Aircraft Assembly Scenes
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Journal Article
An Autonomous Mobile Measurement Method for Key Feature Points in Complex Aircraft Assembly Scenes
2025
Overview
Large-scale measurement of key feature points (KFPs) on an aircraft is essential for coordinated movement of locators, which is critical to the final assembly accuracy. Due to the large number and wide distribution of KFPs as well as line-of-sight occlusion, network measurement of laser trackers (LTs) is required. Existing approaches rely on operational experience for the configuration of stations, sequences and station transitions of LTs, which compromises both efficiency and automation capability. To tackle this challenge, this article presents an autonomous mobile measurement method for KFPs in complex scenes of aircraft assembly, incorporating path self-planning and self-positioning capabilities, thereby substantially diminishing temporal expenditure. Firstly, a simultaneous self-planning method of measurement stations and tasks is proposed to determine the minimum number of stations, optimal locations, and their specific KFPs at each station. Secondly, considering obstacles and turning time, a path planning model of mobile LTs combining coarse and fine localization is established to realize automatic station transitions. Finally, an optimal sequence of series of KFPs with a wide spatial distribution is generated to minimize total distance. Aircraft component assembly experiments validated the method, cutting measurement error by 37% and total measurement time by over 50%.
