and DOFC methods, the increased robustness originates
from the state estimator, where the impact of the
process measurements on the state estimates is
decreased, inevitably resulting in a slower convergence.
However, if Figures 27 and 36 are compared, there are
some differences on how the rate the robustness and the
convergence time increases as a function of the parameter.
In some processes, the convergence time is not
crucial and very high robustness can be achieved.
However, in processes with fast frequency-varying disturbances
the convergence time has to be low, resulting
in a less robust closed-loop system. Clearly, all of the