In this work, mechanical waves are used in order to estimate
dynamics of any flexible lumped system along with its parameters
without taking any measurement from the system. By considering
mechanical waves that propagate through the dynamical
system as a natural feedback that carries all system information
back to one of the system boundary conditions. And instead
of attaching any sensor or performing any parameter identification
process to obtain certain information from the system,
mechanical waves are estimated, analyzed and decoupled in order
to extract system dynamics and parameters. In this paper,
waves are used in order to estimate flexible system parameters
and states
