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:

A flexible and cost-effective compensation method for leveling using large-scale coordinate measuring machines and its application in aircraft digital assembly

点击次数: 所属单位:机电学院 发表刊物:MEASUREMENT SCIENCE AND TECHNOLOGY 关键字:uncertainty large-scale measurement leveling aircraft assembly compensation network tighten points 摘要:In the assembly process of large-size aerospace products, the leveling and horizontal alignment of large components are essential prior to the installation of an inertial navigation system (INS) and the final quality inspection. In general, the inherent coordinate systems of large-scale coordinate measuring devices are not coincident with the geodetic horizontal system, and a dual-axis compensation system is commonly required for the measurement of difference in heights. These compensation systems are expensive and dedicated designs for different devices at present. Considering that a large-size assembly site usually needs more than one measuring device, a compensation approach which is versatile for different devices would be a more convenient and economic choice for manufacturers. In this paper, a flexible and cost-effective compensation method is proposed. Firstly, an auxiliary measuring device called a versatile compensation fixture (VCF) is designed, which mainly comprises reference points for coordinate transformation and a dual-axis inclinometer, and a kind of network tighten points (NTPs) are introduced and temporarily deployed in the large measuring space to further reduce transformation error. Secondly, the measuring principle of height difference is studied, based on coordinate transformation theory and trigonometry while considering the effects of earth curvature, and the coordinate transformation parameters are derived by least squares adjustment. Thirdly, the analytical solution of leveling uncertainty is analyzed, based on which the key parameters of the VCF and the proper deployment of NTPs are determined according to the leveling accuracy requirement. Furthermore, the proposed method is practically applied to the assembly of a large helicopter by developing an automatic leveling and alignment system. By measuring four NTPs, the leveling uncertainty (2 sigma) is reduced by 29.4% to about 0.12 mm, compared with that without NTPs. ISSN号:0957-0233 是否译文: 发表时间:2018-06-01 合写作者:Deng, Zhengping,Li, Shuanggao 通讯作者:黄翔