Research on Tracing Aircraft Assembly Error Source Based on SPC and SOFM

Abstract. Aiming at improving the assembly quality, a method to trace the error source is proposed. Firstly, statistical process control (SPC) judges the abnormalitythrough the distribution and trend of the position errors. Then based on the measurement data from laser trackers, shape data of aircraft components is constructed to mine the small assembly data. Finally, an unsupervised learning method (SOFM) is adapted to cluster each flight to achieve error source tracing.