Control reconfiguration based on unfolding of input/output automata

Fault-Tolerant Control of Discrete Event Systems: Comparison of two approaches on the same case study

“…The method presented in [5] proposes a technic for control reconfiguration. It principle is shown in Figure 3.…”

“…• Input/Output adaptation: the input or output event associated with the failed component is substituted by an event that ensures a correct behavior of the system. More details on the formalism and the construction process can be found in [5].…”

“…However, it is not applicable to all types of faults, and requires to model the faults and their impact on the system. On the other hand, the reconfiguration control method [5] is applicable to a larger number of errors, but requires the use of a diagnoser to detect the occurrence of faults. In addition, there is no tool facilitating the application of the method.…”

“…Hence methods of fault-tolerant control for Discrete Event Systems (DES) can be classified into two categories: methods based on faultaccommodation ( [2], [3], [4]) and methods based on reconfiguration ( [5], [6]). This paper proposes a comparison of the fault-hiding approach [4] and of the control reconfiguration approach [5] through an application on a single case study. These methods were selected in order to compare one method using faultaccommodation and on method using reconfiguration.…”