基于SDT和间接平差的中机身自动调姿精度分析

doi:10.7527/S1000-6893.2017.421301

材料工程与机械制造

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基于SDT和间接平差的中机身自动调姿精度分析

朱永国¹, 张文博¹, 刘春锋², 赵爽²

1. 南昌航空大学航空制造工程学院, 南昌 330063;
2. 中航工业江西洪都航空工业集团有限责任公司, 南昌 330024

收稿日期:2017-04-05 修回日期:2017-08-21 出版日期:2017-12-15 发布日期:2017-08-21
通讯作者: 朱永国 E-mail:zhuyongguo_2003@163.com
基金资助:
国家自然科学基金（51565042）；江西省重点研发计划（20161BBE53005，20171BBE50007）

Accuracy analysis for automatical adjustment of aircraft fuselage posture based on SDT and indirect adjustment

ZHU Yongguo¹, ZHANG Wenbo¹, LIU Chunfeng², ZHAO Shuang²

1. School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China;
2. AVIC Jiangxi Hongdu Aviation Industry Group Company Ltd., Nanchang 330024, China

Received:2017-04-05 Revised:2017-08-21 Online:2017-12-15 Published:2017-08-21
Supported by:
National Natural Science Foundation of China (51565042); Focus on Research and Development Plans in Jiangxi Province (20161BBE53005, 20171BBE50007)

摘要/Abstract

摘要： 以4定位器式中机身调姿机构为研究对象，提出了一种飞机部件动态调姿精度的分析方法。首先，使用小位移旋量（Small Displacement Torsors，SDT）对定位器各关键公差建模，建立了定位器4层次误差SDT模型。其次，基于微分变换推导出定位器制造误差与中机身位姿误差之间的显式函数关系，给出了制造误差传递与累积系数矩阵。在此基础上，结合5次多项式轨迹规划方法，建立了单个定位器动态误差传递数学模型。然后，针对多定位器的误差耦合，综合运用间接平差法和加权最小二乘法，提出了多定位器球铰中心点动态误差耦合计算方法，并推导出了误差补偿量计算表达式。试验结果表明，依据该方法计算定位器驱动修正值，对调姿机构实施误差补偿，能较好地降低调姿误差，提高调姿部件的定位精度，为保证大部件对接装配协调准确度提供了有效途径。

关键词: 飞机, 装配, 机身, 小位移旋量(SDT), 间接平差, 误差传递, 误差耦合

Abstract: This paper discusses the mechanism for adjusting aircraft fuselage with four positioners. A calculation method is proposed to analyze dynamic posture-adjusting accuracy of aircraft parts. The Small Displacement Torsor (SDT) is used to model the critical tolerances of the positioner, and the SDT model of four level errors is established for the positioner. An explicit function relationship between manufacturing errors and fuselage's posture error is built based on differential transform method, and the transfer and accumulation coefficient matrices of manufacturing errors are also derived. A mathematical model for dynamic error transfer of a single positioner is established using the five-order polynomial trajectory planning method. Then, to overcome error coupling of multi-positioner, a method for calculating dynamic error coupling of multi-positioner spherical centers is proposed by using indirect adjustment method and weighted least square method, and the expression for error compensation is also derived. The test data show that position and pose errors can be reduced, and posture-adjusting accuracy can be improved with driving compensation according to the proposed method, which can thus provide an effective way to ensure assemble coordination accuracy of large components.

Key words: aircraft, assembly, fuselage, Small Displacement Torsor (SDT), indirect adjustment, error transfer, error coupling

中图分类号:

V262.4

朱永国, 张文博, 刘春锋, 赵爽. 基于SDT和间接平差的中机身自动调姿精度分析[J]. 航空学报, 2017, 38(12): 421301-421301.

ZHU Yongguo, ZHANG Wenbo, LIU Chunfeng, ZHAO Shuang. Accuracy analysis for automatical adjustment of aircraft fuselage posture based on SDT and indirect adjustment[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(12): 421301-421301.

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

基于SDT和间接平差的中机身自动调姿精度分析

Accuracy analysis for automatical adjustment of aircraft fuselage posture based on SDT and indirect adjustment

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