An apparatus for damping an actuator includes an inerter. The inerter includes a first terminal and a second terminal movable relative to one another along an inerter axis and configured to be mutually exclusively coupled to a support structure and a movable device actuated by an actuator. The inerter further includes a rod coupled to and movable with the first terminal and a threaded shaft coupled to and movable with the second terminal. The inerter further includes a flywheel having a flywheel annulus coupled to one of the rod and the threaded shaft. The flywheel is configured to rotate in proportion to axial acceleration of the rod relative to the threaded shaft in correspondence with actuation of the movable device by the actuator.

The present invention relates to a structural damper 1 for protecting structures against vibrations, comprising a first pendulum 3 having a first pendulum mass 3a, a second pendulum 4 having a second pendulum mass 4a, a coupling device 5 and a damping device 6. The coupling device 5 is disposed between the first pendulum mass 3a and the second pendulum mass 4a, and is configured to couple the first pendulum mass 3a to the second pendulum mass 4a in an effective direction of the structural damper 1 and to allow relative movement between the first pendulum mass 3a and the second pendulum mass 4a in a direction of movement angled with respect to the effective direction. The damping device 6 is disposed between the first pendulum mass 3a and the second pendulum mass 4a, and is configured to damp relative movement in the direction of movement between the first pendulum mass 3a and the second pendulum mass 4a.

A vertical seismic isolation device includes: a fixed frame; a movable frame arranged on the fixed frame; a support guide mechanism which allows only vertical movement of the movable frame; and a restoration member which maintains a constant distance between the movable frame and the fixed frame. The support guide mechanism includes: a track rail provided on the fixed frame; a moving block assembled to the track rail through rolling elements; a support leg, which has one end coupled to the moving block and another end coupled to the movable frame, and converts vertical movement of the movable frame into a motion of the moving block; and an auxiliary leg, which is half as long as the support leg, and has one end coupled to the support leg at an intermediate position in a longitudinal direction of the support leg and another end coupled to the fixed frame.

An air spring for a motor vehicle having a rolling bellows filled with gas under pressure, one end of the rolling bellows is connected to a load receiver and the other end is fastened to a roll-off piston. The load receiver and the roll-off piston are moveable relative to one another depending on a force impinging on the load receiver toward the roll-off piston. A sensor device is arranged inside the rolling bellows by which a distance between the load receiver and the roll-off piston is detected. A pressure piece extending in direction of the roll-off piston is arranged at the load receiver and a sensor body is movably drivable along a sensor track of the sensor device by an end region of the pressure piece facing the roll-off piston. The sensor device generates an electric signal corresponding to the position of the sensor body on the sensor track.

A vehicle suspension system (3) includes an electromagnetic damper (7) provided with a sprung member (8) and an unsprung member (9) to apply a drive force and a damping force between the sprung member and the unsprung member, and a control unit (10) for controlling the electromagnetic damper. A target load for the electromagnetic damper is determined based on the unsprung member demand load that attenuates a vertical vibration of the unsprung member, and the sprung member demand load that restrains a vertical displacement of the sprung member. An absolute value of the sprung member demand load is reduced when a sprung member frequency is in an unsprung member resonance frequency range.

There is provided a dual rack and pinion rotational inerter system for damping movement of a flight control surface of an aircraft. The system has a flexible holding structure disposed between the flight control surface and a support structure of the aircraft. The system has a dual rack and pinion assembly held by and between the flexible holding structure. The dual rack and pinion assembly has a first rack, a second rack, and a pinion engaged to and between the racks. The system has a first terminal coupled to the first rack and coupled to the flight control surface, via a pivot element, and a second terminal coupled to the second rack, and coupled to the support structure. The system has a pair of inertia wheels adjacent the flexible holding structure. The system has an axle element inserted through the inertial wheels, the flexible holding structure, and the pinion.

An electric damper for a vehicle may include: a housing body fixed to a vehicle body; a gear bar including a first end coupled to a knuckle of a wheel, and a second end extending into the housing body, with a rack gear provided on the gear bar; a first intersection gear unit installed in a direction intersecting a movement direction of the gear and configured to engage with the rack gear and rotate; a first power transmitting gear unit configured to engage with the first intersection gear unit and rotate, and including a rotating shaft installed parallel to the gear bar; a rotator configured to engage with the first power transmitting gear unit, and provided in a shape enclosing an outer surface of the gear bar; and a stator installed in the housing body at a position facing the rotator and having a magnetic force.

Rotational translation of an inertial mass rotor is used for providing damping of low frequency noise and vibration. An axial component is mounted so as to translate axial movement of an inertial linearly-displaceable member to rotational movement of an inertial mass rotor. The translation to rotational movement of the inertial mass rotor provides inertial amplification in the form of translational-rotational coupling. This enables the construction of a compact assembly, which allows light ultra-low frequency resonances to be concentrated, and which absorbs such low frequency noise energy.

A shock absorbing apparatus that includes a baseplate adapted to be mounted on a platform, a flexure member that operably engages with the baseplate, and a mounting plate that operably engages with the flexure member. The mounting plate is free from direct engagement with the baseplate and is moveable between a neutral position and a translated position with respect to the baseplate. The mounting plate is also adapted to hold a device. The flexure member is adapted to absorb shock forces caused by a ballistic shock event or a projectile motion event in proximity to or applied on the platform.

A linear displacement damper structure includes a screw shaft, a metallic disk, a screw barrel, a controlling member, and a driving member. The screw shaft is fixed in a position, connected to the metallic disk, and threaded with the screw barrel. The screw barrel is connected to an external device and driven by the external device to perform a linear displacement along a length direction of the screw shaft relative to the screw shaft, so that the screw shaft drives the screw shaft and the metallic shaft. The controlling member has a permanent magnet and is disposed near to the metallic disk, so that the metallic disk generates a magnetic resistance to reduce the rotation speed of the metallic disk. The driving member drives the controlling member to move to change a distance between the controlling member and the metallic disk to adjust the magnitude of the magnetic resistance.