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On the stabilization of decentralized control systems

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2 Author(s)
Shih-Ho Wang ; NASA Langley Research Center, Hampton, VA, USA ; Davison, E.

This paper considers the problem of stabilizing a linear time-invariant multivariable system by using several local feedback control laws. Each local feedback control law depends only on partial system outputs. A necessary and sufficient condition for the existence of local control laws with dynamic compensation to stabilize a given system is derived. This condition is stated in terms of a new notion, called "fixed modes," which is a natural generalization of the well-known concept of uncontrollable modes and unobservable modes that occur in centralized control system problems. A procedure that constructs a set of stabilizing feedback control laws is given.

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Automatic Control, IEEE Transactions on  (Volume:18 ,  Issue: 5 )