Strip-shaped time series data mining method based on data patterns

Abstract

The invention provides a strip-shaped time series data mining method based on data patterns. Data pre-processing is conducted on PDA monitoring data for cold-rolled sheet production, noise data, vacancy data and inconsistent data in original data are excluded; findings of a frequent item set and a plurality of item sets are conducted on data after being processed, and the frequent item set and the item sets are found out; association rule findings are conducted on the found frequency item set in the finding process of the frequency item set, and a potential association rules hidden in the data are found out. According to the method, because an average support degree and an average confidence coefficient threshold value are brought in and used in an Apriori algorithm, a significative frequency item set and association rules can be efficiently mined, insignificant data association can be effectively removed, a data basis can be provided for controlling of a high-precision strip shape, the adjustment time of the strip shape is greatly shortened, the control precision of the strip shape is improved, and the aggregative indicator of the strip shape is stably controlled to be within 5I.

Description

technical field [0001] The invention belongs to the field of process automatic control, in particular to a time series data mining method for cold continuous rolling strip shape control based on data patterns. Background technique [0002] Time series data mining is one of the important steps of knowledge discovery in time series database, and it is a kind of time series of flat data. Shape control is one of the core technologies of cold-rolled strip processing. In recent years, with the continuous advancement of science and technology, advanced shape control technologies have emerged. Among the many high-precision shape control methods, the representative methods are : Optimization of rolling schedule, hydraulic roll bending, roll tilting, roll traverse, roll cooling in sections, etc. The development of shape control technology has promoted the equipment progress and industrial upgrading of the cold-rolled strip industry, and the production benefit and efficiency have been...

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Problems solved by technology

However, the concept of the average threshold has not yet been applied in the present invention,

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