过程复杂性, 信息熵, 质量控制, 制造系统

 ,

The complexity of manufacturing processes causes difficulties in process modeling, forecasting and control.From the information theory point of view, the information entropy of process is inversely related to their degree of order, therefore, process complexity can be described by information entropy to further analyze quality state and evolution direction of processes.To describe quantitatively the complexity in manufacturing processes,the information entropy theory was extended to establish a generalized information entropy model based on size, difficulty and state-diversity.Then complexity of manufacturing processes were divided into static and dynamic complexity based on their dependency on time.The extended information entropy model was used to study how to measure the complexity in manufacturing processes, and the method was applied in quality analyses and evaluation of manufacturing processes to measure quantitatively the effectiveness of process quality control by complexity. Finally, an example demonstrates validity of the proposed theory and methodology.

process complexity, information entropy, quality control, manufacturing system