  The scattering cancellation technique (SCT) has proved to be an effective way
to render static objects invisible to electromagnetic and acoustic waves.
However, rotating cylindrical or spherical objects possess additional peculiar
scattering features that cannot be cancelled by regular SCT-based cloaks. Here,
a generalized SCT theory to cloak spinning objects, and hide them from static
observers, based on rotating shells with different angular velocity is
discussed. This concept is analytically and numerically demonstrated in the
case of cylinders, showing that generalized SCT operates efficiently in making
rotating objects appear static to an external observer. Our proposal extends
the realm of SCT, and brings it one step closer to its practical realization
that involves moving objects.
