| 摘要 |
PURPOSE:To make a titled device have redundancy for deciding an abnormal state, and to improve the reliability for detection, by comparing an output of each detector with an output of a corresponding model apparatus, and discriminating an abnormal control apparatus by a majority circuit. CONSTITUTION:When one of the apparatuses for constituting a process becomes abnormal, outputs of the related apparatuses take a value shifted from a normal value, respectively, but since a dynamic characteristic model used for an abnormal state of the process uses only a set value as an input brought from the process, the same value that is same as the set value applied to a setting device 3 is inputted to a set model 13. In this way, a result of dynamic characteristic calculation is not influenced by an abnormal state of the apparatus for constituting the process. Accordingly, in case when a difference between a measured value Xi and a calculation result Yi exceed a threshold level by M-number or more, among the whole N-number, it is decided to be abnormal, by which the device is made to have redundancy for deciding an abnormal state, and the reliability of detection can be improved. |
