In maintenance of engineering systems, condition monitoring, fault diagnosis and fault
prognosis constitute some of the principal tasks. With the increase of the number of …

The problem of achieving fault-tolerant supervision of discrete-event systems is considered
from the viewpoint of safe and timely diagnosis of unobservable faults. To this end, the new …

The constituent controllers in a supervisory control system may sometimes fail as a result of
an intruder interfering with the feedback performance of the system. The intrusion may allow …

Detectability of discrete event systems, defined as the ability to determine the current and
subsequent states, is very important in diagnosis, control, and many other applications. So …

The growth of manufacturing control software from simple NC and PLC-based systems to
concurrent networked systems incorporating PCs, PLCs, CNCs, and enterprise databases …

Online fault diagnosis is a task of critical importance for maintaining a high level of
operational safety in many chemical plants. The Petri-net models are adopted in this work for …

Automated systems are vulnerable to faults such as defects in sensors or in actuators and
failures in controllers or in control loop, which can cause un-desired reactions and …

For the past few years, electronics manufacturing may have been the victim of its own
success. Unlike in heavier industries, rationalization is a concept that was unknown in the …

This paper presents a method for studying diagnosability of Automated Manufacturing
Systems (AMS) using structure theory of Petri nets. AMS are assumed to be modeled as …

This paper investigates the security of commands in cyber-physical systems at the
supervisory control layer from an attacker's perspective. With observation capabilities …