Fault diagnosis for closed-loop drug infusion

The introduction of a supervisory level into a systems architecture gives a more robust control structure, whereby one can translate the requirements given by the user to a knowledge-base for use by the controller. It also provides a complete system structure for fault detection and diagnosis. As shown in this paper, it has been implemented successfully for a medical system and provides generic control tasks for keeping the process on-line within acceptable behaviour boundaries. If a fault occurs in the process, the control task passes through a primary direct control regime first, then an adaptive control regime, and finally a fault diagnosis regime, each attempting to drive the system behaviour into an acceptable zone