  This paper deals with the analysis of input/output-to-state stability (IOSS)
and construction of state-norm estimators for continuous-time switched
nonlinear systems under restricted switching. Our contributions are twofold.
First, given a family of systems, possibly containing unstable dynamics, a set
of admissible switches between the subsystems and admissible minimum and
maximum dwell times on the subsystems, we identify a class of switching signals
that obeys the given restrictions and preserves IOSS of the resulting switched
system. Second, we design two classes of state-norm estimators for switched
systems under our class of stabilizing switching signals. These estimators are
switched systems themselves with two subsystems -- one stable and one unstable.
The key apparatus for our analysis is multiple Lyapunov-like functions. A
numerical example is presented to demonstrate our results.

Optimization and Control;Systems and Control;Systems and Control