ABSTRACT
Department of Control Engineering, National Chiao Tung University, Hsinchu, Taiwan, 300 ROC
4.1. INTRODUCTION
Safety is an increasingly important issue in modem process plants and aerospace systems. To ensure reliable operations, a fault monitoring and diagnosis scheme needs to be available. This procedure begins with moni toring the status of each element of the process, actuators, sensors, control equipment - including their behavior in open and closed loop operations. The fault diagnosis (mainly including fault detection and isolation (FDI) tasks) approaches of today are either based on hardware redundancy, realized by additional physical equipment, or on analytical redundancy, mostly implemented as computer software on process supervision computers.
