Cigarette quality evaluation method and system based on principal component analysis

Abstract

The invention discloses a cigarette quality evaluation method and system based on principal component analysis. The cigarette quality evaluation method and system solves the problem that an existing single-variable evaluation method cannot carry out procedure quality evaluation on multiple-variable procedures. The cigarette quality evaluation method and system uses a principal component analysis method to evaluate processing quality of the multiple-variable procedures and can provide basis for comprehensively grasping procedure quality processing states and procedure quality improvement. The method comprises the steps of firstly, calculating process capability indexes of all processing parameters, then using the principal component analyzing method to analyze all processing parameter data, confirming the number of principal components according to the principle that the accumulative total contribution rate is larger than or equal to 90%, confirming weights of all components according to the explanation variances of all principal components, and finally using an arithmetic weighting method to obtain procedure comprehensive process capability indexes. The cigarette quality evaluation method and system can provide more comprehensive and objective results and provides an effectively tool for an enterprise to know procedure total processing quality situations.

Description

technical field [0001] The invention discloses a cigarette process quality evaluation method and system based on principal component analysis, belonging to the technical field of tobacco process quality evaluation. Background technique [0002] A Chinese patent discloses a "Comprehensive Evaluation System and Method for Cigarette Process Quality Based on Gray Relational Analysis" (Patent No. 200810237698.3). The technical points of the above-mentioned patent are: the system and method described are single-process quality evaluation and gray relational analysis methods The combination of the process capability index of each process parameter is calculated first, and then the Cpk value is comprehensively evaluated by the gray correlation method. The final comprehensive evaluation result is the ranking of the process quality of each evaluation object. Analyze the ranking results of Cpk and process quality. The shortcoming of above-mentioned patent is as follows: [0003] (1) ...

AI Technical Summary

Problems solved by technology

[0003] (1) This method only performs a simple sorting on the results obtained from the gray relational analysis to determine the quality of the comprehensive process of the evaluation object, and improves the process with the worst evaluation result. The evaluation result is only a few processes The results of relative comparison sometimes cannot truly reflect the real processing quality level of the process. For example, when the process capability index of several processes is greater than or equal to 1.67, the actual process processing quality is at a relatively high level. At this time, for relatively poor There is no meaning to improve the process; at the same time, if the process capability index of several processes is less than 0.67, the actual process quality is at a low level. At this time, the processes with relatively good evaluation results must also be improved

[0004] (2) This method only gives the result of comprehensive evaluation using gray correlation analysis method for a certain process parameter in the cigarette production process, such as the moisture provided in the example part of "Comprehensive Evaluation of Cigarette Shredded Process", while In the process parameters of each process of silk production, moisture is only one of the more important process parameters, and it should also include outlet temperature, hot air temperature, flow rate, etc., depending on the specific process, the number and items of process parameters also vary. The difference is that each process parameter has a very important decisive effect on the quality of cigarette processing, and also directly affects the quality of the overall process quality of the silk making process. Therefore, only a certain process parameter of several processes is used to evaluate the quality of the overall process. The pros and cons are undoubtedly one-sided, so they cannot fully and truly reflect the pros and cons of the overall process quality, and are not universally representative

Images