A medical apparatus according to an example includes: a main body including an inputter configured to receive a user command; a display device positioned to be rotatable on one axis with respect to the main body, and extending along one plane; a locking device limiting a rotation of the display device with respect to the main body when pressure being smaller than first pressure is applied to the display device along a direction that is perpendicular to one surface of the display device; and an attenuator attenuating a vibration of the display device with respect to the main body when pressure being smaller than the first pressure is applied to the display device along the direction that is perpendicular to the one surface of the display device.

A vibration isolator can be configured to provide improved vibration isolation performance, such as in connection with a bicycle saddle. A vibration isolator can be operatively connected to a bicycle saddle. The vibration isolator can be configured to exhibit a non-linear stiffness profile. The non-linear stiffness profile can include a region of quasi-zero stiffness. The vibration isolator can include one or more movable body members and one or more super elastic material members.

This disclosure relates to an active inerter damper configured to be disposed on or in a building structure. The active inerter damper includes a base, a lead screw, a rotational mass block, a driving device and a controller. The lead screw is movably disposed above the base along an axial direction. The rotational mass block is engaged with the lead screw so as to be rotatable with respect to the base. The driving device is connected to the lead screw. The controller is electrically connected to the driving device, and the controller is configured to activate the driving device to move the lead screw along the axial direction so as to rotate the rotational mass block via the lead screw.

An assembly for multi-stage damping comprising a damping unit 20 including a decoupler 36 defining an annular zone 70 surrounding a circular zone 68. The annular zone 70 extends inwardly from an outer ring 38 to define a ring shape for flexing with the circular zone 68 in a first mode 72 to maximize the potential volume of displacement between a first chamber 30 and a second chamber 32. Additionally, the assembly provides for flexing the annular zone 70 independently of the circular zone 68 in a second mode 74 to decrease the potential volume of displacement of the decoupler 36 between the first chamber 30 and the second chamber 32. The decoupler 36 includes a plurality of rings 38, 46, 54 extending axially from a first surface 40 and a second surface 42 for defining an axial travel limit for the annular zone 70.

A damper assembly, in particular for a washing machine, comprises at least one damper which causes a damping effect, in particular an active damper, which can be arranged between two components of the washing machine which are movable relative to one another and can each be connected thereto, a regulation unit which is in signal communication with the damper and is intended to regulate the damping effect of the damper, at least one determination unit, which is in signal communication with the regulation unit, for determining at least one input variable, wherein the regulation unit is designed to transmit a regulation signal to the damper in dependence on the at least one input variable, the damper is designed to variably define its damping effect in dependence on the regulation signal. In addition to the at least one active damper, at least one passive damper can be provided.

A damper assembly comprises a main tube extending along a center axis between a first end and a second end defining a fluid chamber. A main piston is disposed in the fluid chamber dividing the fluid chamber into a compression chamber and a rebound chamber. A piston rod extends along the center axis coupled to the main piston. An external tube extends about the main tube and defines a compensation chamber therebetween. The external tube includes a protrusion extending radially inwardly from an opened end to abut the main tube. An external piston is located in the compensation chamber and coupled to the main tube, dividing the compensation chamber into a first compartment and a second compartment. The first compartment extends between the protrusion and the external piston for containing a working fluid. The second compartment extends between the closed end and the external piston for containing a gas.

A suspension characteristic is changed depending on a travel state by a simple structure. An ECU uses a vehicle speed-spring constant setting part to calculate a target spring constant depending on a vehicle speed, and uses a spring constant-frequency setting part to calculate a set frequency corresponding to the target spring constant. An oscillation input calculation part generates a signal representing an oscillation input oscillating at the set frequency. A superimposition part sets a value acquired by superimposing the oscillation input on a target driving force to a new target driving force. As a result, the wheel exhibits a minute oscillation in a longitudinal direction, resulting in an input of the minute oscillation to a suspension bush. The suspension bush changes in a spring constant and a damping coefficient depending on the frequency of the input minute oscillation. As a result, the suspension characteristic can be changed.

A self-balancing vibration damping system, an active vibration damping seat, and transport equipment are provided. The self-balancing vibration damping system includes an active vibration damping module, a control module, a sensor module, and a receiving module, where the sensor module is configured to acquire motion data of the transport equipment; the active vibration damping module includes a first rotating assembly and a second rotating assembly; the first rotating assembly is provided in an accommodation space; the second rotating assembly is provided at a driving end of the first rotating assembly, and is butted with the receiving module; the control module is configured to control the first rotating assembly and the second rotating assembly to operate synchronously according to the motion data, so as to provide a force opposite to a tilt direction of the receiving module.

A vehicle powertrain proactive damping system includes a plurality of proactive damping structures mounted on a powertrain structure with each proactive damping structure includes a magneto rheological elastomer (MRE). An electromagnet is associated with each proactive damping structure. A control unit includes a processor circuit. A sensor obtains vibration data regarding the powertrain structure. A LIDAR sensor is mounted on the vehicle and is electrically connected with the control unit. The LIDAR sensor provides data to the control unit indicative of upcoming road surface conditions to be experienced by the vehicle. Based on data from at the sensor and the LIDAR sensor, the processor circuit is constructed and arranged to control voltage to the electromagnets to selectively adjust a rigidity of the associated proactive damping structure so as to control vibrational effects on the powertrain structure.

Systems and methods provide for the mitigation of vibrational forces acting on a horizontal stabilizer of an aircraft. According to one aspect, a damper is coupled to a front portion of a horizontal stabilizer to dampen vibrations in a first degree of freedom, with another damper coupled to a mounting point of the horizontal stabilizer to dampen vibrations in a second degree of freedom. The dampers may be passive, operating independently to mitigate vibrational forces, or active, applying a mitigating force to the horizontal stabilizer based on real-time or estimated vibration states.