A vibratory rammer includes an upper mass, a lower mass coupled to the upper mass, a longitudinal axis extending centrally through the upper mass and the lower mass, and a handle coupled to the upper mass with a handle vibration dampening mechanism that is configured to attenuate vibration transmitted to the handle. The handle is configured to support a user interface on a first side of the longitudinal axis. A motor is coupled to the upper mass and a drive mechanism is operably coupled to the motor and the lower mass. The drive mechanism configured to move the lower mass in a reciprocating manner. A battery provides power to the motor and is coupled to the upper mass with a battery vibration dampening mechanism that is configured to attenuate vibration transmitted to the battery. The battery positioned on a second side of the longitudinal axis opposite the first side.

A tuneable clamping device (1) is envisaged which comprises a stationary part (2) which is fixed to a table of a machine tool (10) or being part of a table of a machine tool (10), and a moving table (3) on which the actual flexible workpiece (11) is clamped. The tuneable clamping device (1) achieves tuning between the standing part (2) and the machine tool table (10) in order to damp a dominant mode of the workpiece (11) by playing the role of a device that provides serial dynamic coupling or coupling through the process to dissipate indirectly kinetic energy related to the workpiece (11).

A method and an apparatus for isolating a vibration of a positioning device are provided. The apparatus includes a base plate for the positioning device, at least one active bearing element for bearing the base plate on/at a foundation and at least one evaluation and control device. The apparatus includes at least one means for determining a foundation movement-dependent quantity, wherein the active bearing element is controllable by the at least one control and evaluation device on the basis of the foundation movement-dependent quantity.

A spring damper device comprising a directional spring (e.g., coil) having first and second ends, and defining an inner diameter region. A damper (e.g., viscoelastic polymer slug) comprising an element of elasticity configured to be situated within the inner diameter region of the directional spring. In response to a load on the spring damper device, the directional spring operates to compress, and the damper operates to dampen vibration associated with the load. The damper can comprise a viscoelastic damper comprising both an element of viscosity and the element of elasticity. The damper can be substantially coaxially aligned with the directional spring. Spring damper device(s) can be preloaded in a micro adjustment mechanism to account for positional adjustments between two structures (e.g., between a scope and a firearm), such that the spring(s) attenuate a shock impulse event (e.g., when firing), while the damper(s) attenuate vibration (e.g., to prevent damage the scope).

A damping stopper is interposed between two members axially displaced relative to each other and is provided with an elastic body which, when the interval between the two members decreases, is axially compressed by the two members and expands radially outward. In the elastic body, a second member suppressing the expansion is located in one axial region and attached to the outer periphery. When axially compressed by the two members, the elastic body expands while receiving resistance by the second member. The expanding elastic body contacts the side wall of one of the two members.

A passive damper for damping relative lateral movement between a tensioned cable or other oblong member and a support structure includes a first fixture element rigidly connected to the cable or other oblong member, a second fixture element rigidly connected to the support structure, and at least one rotational damping device arranged between the first and second fixture elements . The rotational damping device is configured to translate the relative lateral movement into relative rotational moment between at least two arms of the rotational damping device that are connected at a rotational joint with a damping pad clamped in between the at least two arms The rotational joint has a rotational axis (Y) substantially parallel with a longitudinal axis (X) of the cable.

A damper for damping vibrations of a structure comprises: a first damping unit, comprising a first damping body having a first mass (m.sub.1), a first spring element having a first spring constant (k.sub.1) and a first damping element having a first damping constant (c.sub.1), wherein said first damping body is configured to be attached to said structure via said first spring element and said first damping element; and a second damping unit, comprising a second damping body having a second mass (m.sub.2), a second spring element having a second spring constant (k.sub.2) and a second damping element having a second damping constant (c.sub.2), wherein said second damping body is configured to be attached to said first damping body via said second spring element and said second damping element.

The present invention relates to a solar panel to which a high-damping stacked reinforcement part is applied and, more specifically, to a solar panel to which a high-damping stacked reinforcement part is applied, comprising: a power generation unit for generating electrical energy; a coupling part to which the power generation unit is coupled, and which has a circuit formed therein; and a reinforcement part for reinforcing the rigidity of the coupling part and damping vibration to be transmitted, and thus the present invention can prevent the power generation unit from being damaged by vibration, or the solar panel from inducing wobbling of a satellite by failing to damp the vibration.

A solar tracker assembly is provided which includes a support column, a torque tube or torsion beam connected to the support column, a mounting mechanism attached to the torque tube or torsion beam, a drive system connected to the torque tube or torsion beam, and a spring counter-balance assembly connected to the torque tube or torsion beam. An exemplary spring counter-balance assembly comprises a bearing housing and a bushing disposed within the bearing housing and configured to be slideably mounted onto the torque tube or torsion beam, and one or more compressible cords made of a flexible material. The compressible cords are located between the bushing and the bearing housing and provide damping during rotational movement of the solar tracker assembly. An exemplary spring counter-balance assembly is provided including at least one top bracket and at least one bottom bracket, at least one spring, a damper, and a bracket. An exemplary spring counter-balance assembly comprises a bearing housing and a bushing disposed within the bearing housing and configured to be slideably mounted onto the torque tube or torsion beam. The spring counter-balance assembly may include at least one coil spring and a rotational stop. The bushing may be made of an elastomeric material and define one or more air spaces.

A device together with an assigned working machine for decoupling vibrations between two systems (2, 4) in the form of spring-mass oscillators, of which one system (2) is assigned to a motion machine and the other system (4) is assigned to an operator operating the motion machine. The other system (4) at least partially performs motions about a transverse axis (Q) during driving motions of the motion machine and in doing so is subject to vertical motions in the direction of a vertical axis (z) at an absolute vertical speed (v.sub.z1,1) serving as an input variable of control devices and/or regulating devices. Those devices control a damping system (8) of the one system (2) and/or the other system (4) to compensate for the vibrations. The respective pitch motion of the other system (4) is detected by at least one rotation rate sensor. The respective measured value (ω.sub.1) of the sensor, preferably amplified by only a predeterminable factor (L.sub.1), results in the absolute vertical speed (v.sub.z1,1) as input variable.