Economic Design Method of vsi EWMA Control Chart Based on Preventive Maintenance and Mass Loss Function

Abstract

The present invention relates to the economical design method of VSI EWMA control chart based on preventive maintenance and quality loss function, which effectively improves process monitoring efficiency while reducing process control cost; the technical solution includes the following steps: Step 1: Establishing the monitoring of production process System; Step 2: Establish the cost function ECT per unit time with the goal of minimization, which is a complete design model; Step 3: Construct a genetic algorithm based on the model, using Matlab language and combining the control process of a certain chemical composition in the steelmaking process Obtain the optimal design of model parameters; step 4: adopt orthogonal experiment design and regression analysis method to carry out sensitivity analysis to model, explain the different influence of model parameter to objective function; The present invention can reduce process control while improving process monitoring efficiency cost.

Description

technical field [0001] The invention relates to the field of economical design of production quality, in particular to an economical design method of VSI EWMA control chart based on preventive maintenance and quality loss function. Background technique [0002] Statistical process control (SPC) and maintenance decision-making are important tools in manufacturing, which help to improve product quality and reduce control costs in the production process. The joint economic design of the two is more effective in improving the economic efficiency of the production system than the design of a single aspect, so it has received widespread attention and research from scholars in recent years. And improving monitoring efficiency and reducing process control cost are the goals pursued by economic design. [0003] The primary tool for statistical process control is the control chart. In terms of monitoring efficiency, the EWMA control chart with variable sampling intervals has higher ...

AI Technical Summary

Problems solved by technology

In terms of monitoring efficiency, the EWMA control chart with variable sampling intervals has higher monitoring efficiency for small fluctuations in the production process; in terms of process control costs, the quality loss function emphasizes the loss caused by the deviation between the quality output and the target value, while The traditional VSI EWMA control chart economic model rarely considers this part of the loss

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