| 摘要 |
PROBLEM TO BE SOLVED: To improve detection accuracy for abnormality diagnosis.SOLUTION: An abnormality diagnosis apparatus comprises: preprocessing means determining singular values from a correlation matrix of normal data represented by values of respective parameters at normal time and identifying the number of higher singular values from the determined singular values under a predetermined condition; calculation means calculating a Mahalanobis distance divided by the number of higher singular values, using a pseudo inverse matrix of a correlation matrix of normal data obtained by using diagnosis data represented by values of diagnostic parameters measured at the same time and higher singular values in the number of higher singular values identified by the preprocessing; and determination means determining that an abnormality occurs if the Mahalanobis distance calculated by the calculation means is greater than a predetermined threshold.SELECTED DRAWING: Figure 1 |
