An observer based approach for achieving fault diagnosis and fault tolerant control of systems modeled as hybrid Petri nets

Mathematical modeling and fuzzy availability analysis for serial processes in the crystallization system of a sugar plant

“…Some of the techniques which are widely used are: event tree, fault tree analysis (FTA), reliability block diagrams (RBDs), Petri nets (PNs) and Markovian approach, as stated by Garg and Sharma (2012) and Renganathan and Bhaskar (2011). Garg and Sharma (2011) used the concept of fuzzy set theory to represent the failure and repair data and analyzed the behavior of the system using various reliability indices.…”

Application of stochastic discrete event system framework for detection of induced low rate TCP attack

“…We have attempted to illustrate that this framework can also be applied to detect network attacks i.e., induced attack. For a better illustration that a DES automation theory basically developed for industrial process systems can also be applied for network attacks, we have first demonstrated how the theory detects a valve 'stuck-closed' fault in a classical three tank system [6]. Next we augment the DES framework with model variables and apply the same for detecting the induced attack.…”

“…Next, the issues with these mitigation schemes are identified, thereby bringing out the motivation of using stochastic Discrete Event System (DES) [5] theory for detecting the attack. The application of stochastic DES theory for failure detection and diagnosis of a valve 'stuck-closed' fault in a classical three tank system [6] is demonstrated. Following that, we show how the same stochastic DES theory with slight modification can be applied for detecting the induced low rate TCP attack.…”

“…It has been shown that the scheme is scalable, does not require modification in the TCP protocol and is formally verifiable. For a comprehensive illustration that a DES automation theory, basically developed for industrial process systems, can also be applied for network attacks, we have first presented the detection of valve 'stuck-closed' failure in the classical three tank system [6]. Then we have adapted the same theory, by augmenting model variables into the stochastic DES framework (to handle computational complexity) and applied it for developing a system to detect the induced attack.…”

Application of Petri nets to performance evaluation of subsea blowout preventer system

“…Kaakai et al [22] presented a simulation model based on hybrid Petri nets in order to help transit authorities to carry out performance evaluation procedures, which can validate design projects of new stations or evaluate the existing stations for safety and security purposes. Renganathan et al [23,24] described a technique for on-line fault diagnosis of continuous systems modeled using Petri nets, and fault tolerant control for systems has also been provided which are modeled using timed hybrid Petri nets. Miyagi et al [25] introduced a methodology for modeling fault-tolerant manufacturing systems based on the hierarchical and modular integration of Petri nets, which can optimize normal productive processes and perform detection and treatment of faults.…”