  This paper investigates the energy harvested from the flutter of a plate in
an axial flow by making use of piezoelectric materials. The equations for
fully-coupled linear dynamics of the fluid-solid and electrical systems are
derived. The continuous limit is then considered, when the characteristic
length of the plate's deformations is large compared to the piezoelectric
patches' length. The linear stability analysis of the coupled system is
addressed from both a local and global point of view. Piezoelectric energy
harvesting adds rigidity and damping on the motion of the flexible plate, and
destabilization by dissipation is observed for negative energy waves
propagating in the medium. This result is confirmed in the global analysis of
fluttering modes of a finite-length plate. It is finally observed that waves or
modes destabilized by piezoelectric coupling maximize the energy conversion
efficiency.
