Abstract
In this paper, the authors propose a practical design method useful in control and
supervising of control system in presence of process faults. The fault detection and isolation (FDI)
problem is an inherently complex one. Because of this reason, we have considered the case when
one or more parameters of process are modified. The immediate goals is to preserve the stability
of process and, if is possible, to control the process in a slightly degraded manner.
