화학공학소재연구정보센터
KAGAKU KOGAKU RONBUNSHU, Vol.25, No.3, 384-388, 1999
Controller configuration design and troubleshooting planning using CE-matrices
It is difficult to plan countermeasures against all kinds of abnormal states. In this paper, faults of actuators and sensors are dealt with as causes of abnormal states. Countermeasures against such faults can be designed with the same algorithm for control loop configuration. Human operators switch the controller mode from auto to manual in the case of abnormal states. Manual operation can be regarded as control action based on the observed states. Human operators don't consider many situations at once. They just focus their attention on one abnormal value and plan a countermeasure to stabilize it. The countermeasure causes another situation. They infer the effects and plan the next countermeasure against: the situation. If each action is based on an observed value, the design procedure of countermeasures resembles one of control loops. In this paper, the model structure for control loop design is proposed. It uses Cause-Effect matrices, which are Boolean matrices. The control loop design procedure based on the CE-matrices is also proposed. The design algorithm can be the first step to bridge the discontinuity between fault diagnosis and countermeasure planning for various faults of actuators or sensors.