  We propose dynamical schemes to engineer coherent states of a mechanical
resonator coupled to an ancillary, superconducting flux qubit. The flux qubit,
when repeatedly projected on to its ground state drives the mechanical
resonator in to a coherent state in probabilistic, albeit heralded fashion.
Assuming no operations on the state of the mechanical resonator during the
protocol, coherent states are successfully generated only up to a certain value
of the displacement parameter. This restriction can be overcome at the cost of
a one-time operation on the initial state of the mechanical resonator. We
discuss the possibility of experimental realization of the presented schemes.
