화학공학소재연구정보센터
Chemical Engineering Science, Vol.53, No.16, 2921-2931, 1998
Minimax methods for fault isolation in the directional residual approach
This work designs a robust fault isolation method applicable to the directional residual approach by using decision theory. The cost, the loss, and the risk of misclassification are analyzed. To achieve a balance between optimality and robustness, a minimax method is proposed which minimizes the maximum expected loss from misclassification. An isolation procedure is designed for the diagnostic residuals having normal distribution. A simulated distillation example is given to illustrate the implementation of this technique. The suggested approach is compared to the methods derived from the likelihood ratio tests and their relationship elucidated.