摘要
Dimensional variation analysis in multistation manufacturing processes(MMPs)is a challenging research topic with great practical significance.Researchers have been focused on constructing various mathematical models to identify the correlations among the huge amounts of collected production data.However,current models have achieved insufficient insights into the variation correlation laws due to the complexity of the data’s mutual relations.In this study,a data-driven modeling method is developed for deep data-mining and dimensional variation analysis.The proposed initial mathematical expression originates from practical engineering knowledge.Through a mathematical treatment,the mathematical expression is transformed into a first-order AR(1)model format,which contains multiple dimensional variations’interstation and temporal correlating information.To obtain this information,the estimation of the proposed model is discussed in detail.A simulation case involving two key product characteristics of a grinding process is used to demonstrate the effectiveness and accuracy of the proposed method for dimensional variation analysis in MMPs.
基金
The research work was supported by the natural science fund for colleges and universities in Jiangsu province(Nos.15KJB460016 and 14KJB460029)
the major industrial technology project in Xuzhou city(No.KC16GZ015)
the major industrial technology project in Jiangsu Province(No.BE2016047)
the natural science foundation of China(No.71561016).The author would also like to gratefully acknowledge Professor Fugee Tsung and the other colleagues at Hong Kong University of Science and Technology for their valuable comments.
