Resonator, and an aircraft provided with the resonator

A resonator having a heavy member and a spring blade, the heavy member comprising a casing fastened to the spring blade, the heavy member further comprising a set of masses that is movable in translation inside the casing along a longitudinal direction, the resonator including a wormscrew engaged in a slider nut of the set of masses, the resonator including drive means suitable for driving the wormscrew in rotation so that rotation of the wormscrew drives the movement in translation, wherein the casing presents an inside face defining in part at least two cylindrical spaces each presenting a generator line parallel to the longitudinal direction, the two cylindrical spaces being arranged outside a central space, the wormscrew being arranged in the central space, the set of masses comprising two masses slidable respectively in the two cylindrical spaces, the set of masses including a support carrying the slider nut, each mass comprising at least one heavy element fastened to the support, each mass presenting at least two presser means interposed between the mass and the inside face, each presser means comprising a groove formed in a circumference of a mass and contained in a plane perpendicular to the longitudinal direction, each groove describing a closed curve, each presser means comprising at least one resilient member arranged in the groove and a split ring pressed against the inside face by the at least one resilient member of the presser means, the split ring projecting in part from the groove.