Damping of vibrations

In a structure having a first structural component having one or more resonant frequencies and a second structural component (relatively insensitive to said one or more resonant frequencies and being connected or coupled to said resonant structure either directly or indirectly via one or more intermediate structural components,

• a damping apparatus characterised by at least one sensor mounted for detecting vibration of said first structural component, a controller coupled to said at least one sensor for identifying resonances of the first structural component from characteristics of a received signal, and at least one vibration generator coupled to the second structural member for generating vibrations to damp the vibrations of the first structural component, wherein said controller is coupled to said at least one vibration generator to control the frequency and phase of the vibration generator, whereby the at least one vibration generator generates vibrations that are transmitted through the second structural component to the first structural component vibrations to dampen the vibration of the first structural component.