Multi-working-condition process monitoring method based on sparse representation
A technology of sparse representation and process monitoring, applied in electrical testing/monitoring, etc., can solve problems such as weak method applicability, and achieve the effect of strong interpretability and wide application range
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[0013] A multi-working condition process monitoring method based on sparse representation proposed by the present invention, its flow chart is as follows figure 1 shown, including the following steps:
[0014] 1) Use the multi-sensor data acquisition system to collect the data of each normal working condition in the process to form a dictionary (here represents the database) Among them, k represents the number of normal working conditions of the process, Indicates the data matrix (sub-dictionary) corresponding to the process condition i, and m is the number of process variables.
[0015] 2) For dictionaries normalized so that l of each column of data in 2 The norm is that the length of the column vector length is equal to 1, and the new normalized dictionary matrix is obtained as
[0016] 3) The process is running online. The multi-sensor data acquisition system is also used to collect m process variable data. The online running data of the process obtained each t...
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