On fault-tolerant functional observer

In this paper, a new procedure for designing functional observers of linear multi-output systems is presented. Such observer can reconstruct partial-state information asymptotically even when some of the output measurements of the given system are unreliable and it will reconstruct all-state information once these unreliable measurements become regular. Partial closed-loop poles of a certain stabilizable system can be assigned arbitrarily and its closed-loop stability may be guaranteed when some of the output measurements are unreliable.