Redundancy degree and reliability for bilinear systems

In this paper, we develop a technique which permits to determine the redundancy degree in the case of static processes defined by linear and bilinear equations. Thus, this study permits us to count all the sensors or sensor groups for which the failures are accepted, the observability and the progress of the process remaining unchanged. Then we calculate the reliability rate of the process. Indeed, each sensor has a failure probability which determines the instrumentation reliability. If we consider that the inaccessible measures can be deduced from some other measures, then the process reliability will increase