关键词: 装配稳定性, 装配成本, 控制阈在线优化, 互信息, 博弈论

Abstract: To improve assembly precision and assembly stability for complex mechanical products,an online control threshold optimization approach based on mutual information and game theory was put forward.Based on analyzing the characteristic of complex mechanical products assembly,the coupling relation between the control points of assembly quality based on mutual information was represented,and the assembly quality stability measurement model was built.In the case of ensuring the assembly precision,with the goal of minimizing the assembly cost (the quality loss cost and the assembly cost),the relationship between the assembly cost and control threshold was discussed.Based on the game theory,the conflict problem between assembly stability and assembly cost factors were converted into mathematical model to prognosticate the optimal assembly quality control threshold.An example of engine cylinder head was taken as the example to develop the assembly quality control threshold optimization system,and the feasibility and effectiveness of the proposed method was validated.

Key words: assembly stability, assembly cost, online control threshold optimization, mutual information, game theory