an aircraft (2) with a system (1), antivibratoirethe system (1) is arranged antivibratoire at the interface between a body (3) of the aircraft (2) and a housing (4), a main gear box (5), said power constructionto provide a rotation generated by an engine (6) of the aircraft (2), a main rotor (7) to at least make a buoyancy or propulsion.the aircraft (2), the antivibratoire system (1) comprising at least one hitter (10a - 10d) with an elastic means (20a - 20d recall).at least a first accelerometer (21a - 21d) arranged on said body (3), at least a second accelerometer (23) arranged on the cartre (4) of the said construction.and a controller (30) to analyze the dynamic excitation as a function of time of vibration transmitted to the body 5, and (3) of the aircraft (2).
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