Application of MSPC on Tobacco Threshing and Redrying Process Controlling

In order to implement the process monitoring for various indexes of lamina structure at the same time and ensure the stability of lamina quality,the lamina samples,from Yunnan province threshing and redrying factory in 2009,were analyzed by multivariate statistical process control.The stability of the three indexes of lamina structure was judged by T2 diagram of multivariate statistical process control and every uncontrolled group variables were tested.The results showed that during threshing and redrying,stability of group 7 and 11and 17 out of control happened because medium partical content and small partical content was relatively high.Multivariate statistical process control could be applied in threshing and redrying process and many variables could be monitored simultaneously by T2 diagram of multivariate statistical process control and Bonferroin test have some reference value for finding the uncontrolled variables.