An Alignment Of Wing Position And Orientation And Assembly Path Interference Detection Method Based On Assembly Measurement Data

Aiming at the assembly interference problem of the fork-ear joints due to the deformation in wing-fuselage joining process,a detection method and a correction scheme based on assembly measurement data are proposed. According to the measurement data, determine the actual position and orientation of the fork-ear joints,convert them to a unified coordinate system,use the distance algrithm and the sweeping algrithm to calculate the interference results and determine the correction scheme.Describe the basic theory related to the evaluation of wing position and orientation. Analyze the source of error which affects the alignment of wing position and orientation, described the layout of the wing-fuselage joining system, introduce the concepts of different coordinate systems in assembly system,describe the mathematical description of position and orientation and the coordinate transformation method. Combined with manufacturing accuracy and coordination accuracy requirements, introduce the evaluation process of wing position and orientation.For the static interference of the fork-ear joints, a detection method based on key points distance is proposed. According to the assembly measurement data, calculate the position and orientation of the fork-ear joints in the assembly coordinate system and establish the coordinate transformation relationship between the ear joint and the fork joint. By using the projection method, calculating and summarizing the distance extreme point, the minimum distance between the joint is obtained. Then, by synthesizing the minimum distances of all fork-ear joints,determine the detection result and provide the alignment of wing position and orientation in various fork-ear joint layouts. The simulation result shows the proposed technology is validated.For the dynamic interference of the fork-ear joints, a method based on critical boundary sweeping is proposed. According to the assembly measurement data, establish the coordinate transformation relationship between the ear joint and the fork joint, analyze and calculate the interference between the sweeping formed by the critical boundary of the fork-ear joint. Then,using the simulation data, the method is compared with the multiple interference detection method to verify its effectiveness and efficiency.Finally, summarize the content of the interference detection and correction method in the wing-fuselage joining process, and prospect the future research work.