Forecasting Method of Product Behavior Change Under Working Environment

In the process of product manufacturing, control of assembly error will directly affect product working behavior. Variation of working behavior with assembly error was partitioned to three phases: compensation phase, rapid loss phase and total loss phase. Based on changing curve of product behavior, Function of behavior loss was constructed to describe behavior loss resulting from assembly error of a part of product. The conception and calculating method of behavior loss index (BLI) are given to reflect behavior changing status of whole product under certain assembly accuracy. Based on Jacobian- Torsor method, the Jacobian-Torsor tolerance model, considering impact factors of working condition, was extended and corrected, the assembly error resulted from working environment can be calculated. Combined with BLI, the calculated results can be used to forecast product behavior change lead by working load. The forecast can help to determine next measurement adopted. Finally, an example was used to demonstrate calculating procedure of given method.