This paper addresses two related topics. First, a nonrealizable set of input–output equations
can be made realizable in the classical state space form by adding a postcompensator …

The goal of the technical note is to extend the results on the observability decomposition of
continuous-time nonlinear systems into the discrete-time polynomial systems. In general, the …

The problem of linearization by input–output (i/o) injections is addressed for nonlinear single-
input single-output systems, defined on a homogeneous time scale. The paper provides …

The paper presents a brief overview of the most popular disturbance estimation techniques
together with their application to flatness-based control. Two disturbance estimation …

The paper studies the possibility of constructing observer-based residuals to detect faults in
a nonlinear discrete-time system. The residuals are generated in such a manner that they …