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A new principle and device for large aircraft components gaining accurate support by ball joint

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第5期12卷 405-414页

作者： Bao-gui QIU Jun-xia JIANG Ying-lin KE The State Key Laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

How to obtain an accurate support for large components by ball joint is a key process in aircraft digital assembly. A novel principle and device is developed to solve the problem. Firstly, the working principle of the device is introduced. When three or four displacement sensors installed in the localizer are touched by the ball-head, the spatial relation is calculated between the large aircraft component's ball-head and the localizer's ball-socket. The localizer is driven to achieve a new position by compensation. Relatively, a support revising algorithm is proposed. The localizer's ball-socket approaches the ball-head based on the displacement sensors. According to the points selected from its spherical surface, the coordinates of ball-head spherical center are computed by geometry. Finally, as a typical application, the device is used to conduct a test-fuselage's ball-head into a localizer's ball-socket. Positional deviations of the spherical centers between the ball-head and the ball-socket in the x, y, and z directions are all controlled within ±0.05 mm under various working conditions. The results of the experiments show that the device has the characteristics of high precision, excellent stability, strong operability, and great potential to be applied widely in the modern aircraft industry.

关键词： Aircraft digital assembly Large aircraft component accurate support Ball joint Displacement sensor Three coordinate numerical control localizer

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Informatization Teaching Research Empowers Teachers toward Clustered Innovation and Practice of High-Quality Development

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Frontiers of Education in China 2023年第2期18卷 159-170页

作者： HU Xiaoyong ZENG Xiangyi XU Huanyun CAO Yuxing SUN Shuo School of Educational Information Technology South China Normal UniversityGuangzhou 510631China Special Education Resources Department National Center for Educational TechnologyBeijing 100031China

Teachers are the primary resource of education and an important guarantee for building a high-quality education *** research is an effective way for teacher professional *** paper focuses on problems of the failure of traditional teaching research models,unbalanced supply,and inaccurate support,with the core goal of realizing the clustered,synergistic,and high-quality development of teachers,and builds a new form model of three integrations,one focus,and N innovations for regional informatization teaching research with innovative characteristics,a dual coordination mechanism for the clustered high-quality development of teachers,and an accurate support strategy for the comprehensive literacy of teacher informatization teaching research.

关键词： information technology teaching research clustered high-quality developrnent synergistic mechanism accurate support

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