A Family of Dynamic Controllers with Loop Transfer Recovery

This paper presents a family of controllers with asymptotic loop transfer recovery capability for both the plant input and output nodes. It is shown that the availabble loop transfer recovery regulators belong to this family. The involved controllers are particularly motivated by their better degree of recovery with respet to the well known LQG controller. The delta operator formulation is used to treat the discrete as well as the continuous time systems in a unified framework while ensuring an appropriate numerical robustness [1].