Output-feedback control with almost-disturbance-decoupling property—a singular perturbation approach

Abstract For square invertible and minimum-phase linear time-invariant systems, a high-gain observer-based control law is proposed. This control law provides internal stability for the closed-loop system and has the almost-disturbance-decoupling properly: that is, the influence of the disturbances on the controlled output can be made arbitrarily small.