Optimizing Sensor Activation in a Language Domain for Fault Diag...

Sensors are activated / deactivated according to a sensor activation policy, which is a decision function whose domain is the language of the system. A sensor activation policy is minimal for diagnosability if it is at the point where the system is diagnosable, but any additional deactivation prevents correct system diagnosis. Given that the system is diagnosable when all sensors are always activated, we find in this paper that minimal policies for diagnosability do not always exist. We therefor