These teachings relate to a device that includes a base having an axis that is centered and perpendicular relative to the base and two or more arms each connected to the base at a base hinge The base hinge rotates the two or more arms away from the axis, and one or more expandable bands are connected with distal ends of the two or more arms. The one or more expandable bands absorb energy from rotating of the two or more arms. The device absorbs energy when an external force is applied along the axis of the base.

The invention describes a fluid damper for furniture parts that are movable relative to one another, said fluid damper comprising a piston (4) guided movably in a cylinder (1) along a longitudinal axis. At least one through opening (4.1, 4.2) for fluid flowing through is provided in the piston (4) and/or between the piston (4) and cylinder (1). A sleeve (2) is arranged so as to be radially rotatable, relative to the piston (4) against a spring loading, about the longitudinal axis or about an axis running parallel thereto, which sleeve comprises, on its circumference, a number of wings (2.1, 2.2, 2.1, 2.2) corresponding to the number of through openings (4.1, 4.2). The spring loading is directed such that the wing (2.1, 2.2, 2.1, 2.2) exposes the through opening (4.1, 4.2) when the piston (4) is stationary in the cylinder (1) and in the event of a movement in a movement direction of the piston (4) and of the cylinder (1) relative to one another along the longitudinal axis, and progressively closes said through opening in the event of a movement against the movement direction with increasing relative speed between the piston (4) and cylinder (1) along the longitudinal axis. The fluid damper comprises a hollow-cylindrical part of the piston (4), which surrounds the sleeve (2) and the at least one wing (2.1, 2.2, 2.1, 2.2), which is arranged on the circumference of said sleeve, along at least part of the longitudinal axis thereof.

A large-size axial eddy current damper manufactured by use of screw drive comprises a drive assembly and an eddy current damping generator; the drive assembly comprises a screw drive pair, and a stator and a rotor respectively made of magnetic conductive materials; the screw drive pair comprises a screw rod and a nut sleeved on the screw rod; the screw rod sequentially penetrates through central holes of upper and lower flanges of the stator; the nut is within the stator; the rotor comprises an outer rotor and an inner rotor having the bottom provided with a lower connecting flange; one or more eddy current damping generators are arranged between the stator and the outer rotor. Problems of having difficulty in manufacturing axial dampers with a large damping coefficient and simulating anti-vibration dampers with a speed index of less than 1, by use of eddy current damping, can be solved simultaneously.

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.

An electromechanical chassis actuator includes a single electric motor and two screw drives. The two screw drives use a common threaded spindle. A spindle nut of the first screw drive is rotationally fixed to the electric motor's rotor and engages the threaded spindle in a back-driveable manner. A spindle nut of the second screw drive is selectively coupled to the electric motor's rotor by a coupler and engages the threaded spindle in a self-locking (not back-driveable) manner. When the coupler is in an engaged position, the actuator operates in a level-adjustment mode. When the coupler is in a released position, the actuator operates in a damping mode.

There is provided a dual rack and pinion rotational inerter system for damping movement of a flight control surface of an aircraft having a support structure. The system has a flexible holding structure disposed between the flight control surface and the support structure. The system has a dual rack and pinion assembly held by the flexible holding structure. The system has a first terminal and a second terminal, coupled to the dual rack and pinion assembly. The first terminal is coupled to the flight control surface. The system has a pair of inertia wheels coupled to the flexible holding structure. The system has an axle element inserted through the inertia wheels, the flexible holding structure, and the dual rack and pinion assembly, such that when the flight control surface rotates, the dual rack and pinion rotational inerter system translates and rotates, and movement of the flight control surface is dampened.

An apparatus for damping an actuator includes an inerter. The inerter includes a first terminal and a second terminal movable relative to one another and configured to be mutually exclusively coupled to a support structure and a movable device actuated by an actuator. The inerter further includes a threaded shaft coupled to and movable along the inerter axis with one of the first terminal and the second terminal. The inerter additionally includes a flywheel rotatable in proportion to movement of the threaded shaft in response to axial acceleration of the first terminal relative to the second terminal during actuation of the movable device by the actuator. The inerter reduces actuator-load-oscillatory amplitude at resonance of the actuator and movable device relative to the actuator-load-oscillatory amplitude that would otherwise occur using the same actuator without an inerter.

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.

A extension mechanism for coupling with a closure panel to assist in opening and closing of the closure panel for at least a portion of a path including a housing member, an extension member and one or more bushings for positioning the extension member within the housing member. The bushings can provide friction for assisting in hold positions of the extension mechanism. The extension mechanism can be incorporated as part of a biasing strut such as a spring configured strut.

A regenerative shock absorber having an input module for receiving input linear vibration. A transmission mechanism having an output shaft, and configured to convert relative linear motion of opposite first and second end parts of the shock absorber into rotational motion of the output shaft. A generator module having a flywheel fitted to the output shaft, and an electromagnetic generator. The output shaft may comprise a self-reversing leadscrew which is rotated in a unidirectional direction of rotation when a clutch mechanism fitted thereto is translationally moved relative to the output shaft in each of opposite first and second linear directions. Alternatively, the output shaft may comprise a single threaded leadscrew. The electromagnetic generator is driven when a clutch mechanism fitted to the output shaft is translationally moved relative to the output shaft in one linear direction, and a second electromagnetic generator fitted to the clutch mechanism is driven when the clutch mechanism is translationally moved relative to the output shaft in the opposite linear direction.