On the design of observers with specified eigenvalues

This correspondence considers the problem of designing an observer with specified distinct eigenvalues to estimate a set of linear state functionals for a linear multivariable system. The conditions given for the design of an th-order observer, where (ν0is the observability index), represent an extension of the results of Murdoch [3] and Fortmann and Williamson [2]. The conditions are based on the assumption that the observer eigenvalues are distinct from those of the plant.