IEEE Transactions on Automatic Control, Vol.55, No.10, 2434-2438, 2010
Time-Delay Systems: Design of Delay-Free and Low-Order Observers
This note provides a comprehensive treatment on the design of functional observers for linear systems having a time-varying delay in the state variables. The designed observers possess attractive features of being low-order and delay-free and hence they are cost effective and easy to implement. Existence conditions are derived and a design procedure for finding low-order observers is given.