个人信息
黄翔
招生学科专业:
机械工程 -- 【招收博士、硕士研究生】 -- 机电学院
航空宇航科学与技术 -- 【招收博士、硕士研究生】 -- 机电学院
机械 -- 【招收博士、硕士研究生】 -- 机电学院
联系方式:17749500871;13851538871 学位:工学博士学位

个人信息 Personal information

学历:南京航空航天大学 毕业院校:南京航空航天大学 所在单位:机电学院 办公地点:机电学院15-405 电子邮箱:

Coordinate transformation uncertainty analysis and reduction using hybrid reference system for aircraft assembly

点击次数: 所属单位:机电学院 发表刊物:ASSEMBLY AUTOMATION 关键字:Aircraft assembly Large-scale metrology Coordinate transformation uncertainty Gauss-Markov model Hybrid reference system 摘要:Purpose - In aircraft assembly, standard reference points with nominal coordinates are commonly applied for coordinate transformation between multiple measurement stations and the assembly coordinate system. For several reasons in practical application, these points often fail to envelop the key assembly space, which leads to large transformation uncertainty. This paper aims to analyze and further reduce the coordinate transformation uncertainty by introducing a new hybrid reference system (HRS). Design/methodology/approach - Several temporary extension points without known coordinates are added to enhance the tightness between different stations, especially at the weakness area in the network, thus constituting an HRS together with the existing standard reference points. The coordinate transformation model of the HRS-based measurement network is established based on an extend Gauss-Markov model. By using the geometrical differential property and variance-covariance propagation law, the covariance matrixes in the transformation model are calculated, and the analytical solution of the uncertainties of transformation parameters are ultimately derived. The transformation uncertainty of each check points is presented by Helmert error expression. Findings - The proposed analytical solution of transformation uncertainty is verified using the state-of-the-art Monte Carlo simulation method, but the solution process is simpler and the computation expenses are much less. Practical implications - The HRS with three temporary extension points is practically applied to a tail boom in-site measurement for assembly. The average transformation uncertainty has been reduced by 26 per cent to less than 0.05 mm. Originality/value - The hybrid coordinate transformation model is proposed for the first time. The HRS method for transformation uncertainty reduction is more economical and practical than increasing the number of standard reference points. ISSN号:0144-5154 是否译文: 发表时间:2018-01-01 合写作者:Deng, Zhengping,Li, Shuanggao 通讯作者:黄翔