  This contribution deals with energy-based in-domain control of systems
governed by partial differential equations with spatial domain up to dimension
two. We exploit a port-Hamiltonian system description based on an underlying
jet-bundle formalism, where we restrict ourselves to systems with 2nd-order
Hamiltonian. A certain power-conserving interconnection enables the application
of a dynamic control law based on structural invariants. Furthermore, we use
various examples such as beams and plates with in-domain actuation to
demonstrate the capability of our approach.
