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The literature available on disturbance decoupling (DD) of Boolean controlnetwork (BCN) is built on a restrictive notion of what constitutes asdisturbance decoupling. The results available on necessary and sufficientconditions are of limited applicability because of their stringentrequirements. This work tries to expand the notion of DD in BCN to incorporatea larger number of systems deemed unsuitable for DD. The methods available arefurther restrictive in the sense that system is forced to follow trajectoryunaffected by the disturbances rather than decoupling disturbances while thesystem follows its natural course. Some sufficient conditions are providedunder which the problem can be addressed. This work tries to establish thenotion of disturbance decoupling via feedback control,analogous to theclassical control theory. This approach though, is not limited to DD problemsand can be extended to the general control problems of BCNs. Determination ofobservability, which is sufficient for the fault detection, is proven to beNP-hard for Boolean Control Network. Algorithms based on reconstructability, anecessary condition, of BCN turn out to be of exponential complexity ingeneral.In such cases it makes sense to search for the availability of somespecial structure in BCN that could be utilized for fault detection withminimal computational efforts. An attempt is made to address this problem byintroducing instantaneous fault detection (IFD) and providing necessary andsufficient conditions for the same. Later necessary and sufficient conditionsare proposed for solving the problem of instantaneous fault detection alongwith disturbance decoupling using a single controller.

Disturbance Decoupling and Instantaneous Fault Detection in Boolean Control Networks