A stabilization apparatus for reducing vibration of a 3D printer during operation thereof. A stabilization apparatus features a stationary framework having a base seated atop a support surface and spanning a greater two-dimensional footprint than the 3D printer. One or more flexible elongated suspenders each has one end connected to a respective anchor point each defined on the supportive framework at a respective location of elevated relation to an underside of the base. Another end of each suspender is secured either to the 3D printer itself, or to a floating support atop which the 3D printer is placed. The 3D printer is thereby supported in a floating position of suspended relation to the stationary framework of the stabilization apparatus.

A stabilization apparatus for reducing vibration of a 3D printer during operation thereof. A stabilization apparatus features a stationary framework having a base seated atop a support surface and spanning a greater two-dimensional footprint than the 3D printer. One or more flexible elongated suspenders each has one end connected to a respective anchor point each defined on the supportive framework at a respective location of elevated relation to an underside of the base. Another end of each suspender is secured either to the 3D printer itself, or to a floating support atop which the 3D printer is placed. The 3D printer is thereby supported in a floating position of suspended relation to the stationary framework of the stabilization apparatus.

A large-cooling-capacity integrated Stirling pneumatic refrigerator supported by large-stroke column springs, consisting of an active vibration absorber, a motor, a coaxial type compression-expansion piston, a compression piston column spring, an expansion piston column spring, a hot-end radiator, a cylinder wall, a housing, and a cold finger, wherein the coaxial compression-expansion piston is composed of a compression piston and an expansion piston, the expansion piston is nested in the compression piston, and the compression piston and the expansion piston share one hot-end radiator; the compression piston is driven by a motor, and the expansion piston is driven by gas force and no motor drive is required. The compression piston and the expansion piston are both supported by column springs, the column spring provides an axial restoring force for the coaxial type compression-expansion piston. The active vibration absorber is installed at the tail part of the housing.

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.

There is described a system comprising mechanical equipment and an apparatus for monitoring and/or controlling the mechanical equipment. The mechanical equipment vibrates at a frequency f.sub.vibration in use, and the apparatus is attached to the mechanical equipment such that the apparatus also vibrates when the mechanical equipment is in use. The apparatus comprises an electronics module and a resonant electric generator. The resonant electric generator has a resonant frequency f.sub.0 comparable to the vibrational frequency f.sub.vibration of the mechanical equipment. The resonant electric generator comprises a magnet having an associated a magnetic field, a coil electrically coupled to the electronics module, and a resilient member. The resilient member is configured, when the apparatus is vibrated at or around the resonant frequency f.sub.0, to cause relative oscillation of the coil and the magnet so as to induce an electric current in the coil to thereby power the electronics module. The present application also relates to the apparatus for monitoring and/or controlling the mechanical equipment, and to a method of use of the apparatus with mechanical equipment.

There is described a system comprising mechanical equipment and an apparatus for monitoring and/or controlling the mechanical equipment. The mechanical equipment vibrates at a frequency f.sub.vibration in use, and the apparatus is attached to the mechanical equipment such that the apparatus also vibrates when the mechanical equipment is in use. The apparatus comprises an electronics module and a resonant electric generator. The resonant electric generator has a resonant frequency f.sub.0 comparable to the vibrational frequency f.sub.vibration of the mechanical equipment. The resonant electric generator comprises a magnet having an associated a magnetic field, a coil electrically coupled to the electronics module, and a resilient member. The resilient member is configured, when the apparatus is vibrated at or around the resonant frequency f.sub.0, to cause relative oscillation of the coil and the magnet so as to induce an electric current in the coil to thereby power the electronics module. The present application also relates to the apparatus for monitoring and/or controlling the mechanical equipment, and to a method of use of the apparatus with mechanical equipment.

Described is a system for transmitting a flexural wave acting on one structure to another structure. In one example, a system includes a first structure having a first property and a first end and a second structure having a second property and a second end connected to the first end of the first structure. The first property is different from the second property and may be related to the material and/or geometric properties of the first and second structures. A mechanical resonator is connected to the first structure at a distance from the first end of about a quarter-wavelength of the frequency of a flexural wave acting on the first structure. The mechanical resonator matches a first mechanical impedance of the first structure to a second mechanical impedance of the second structure to allow high transmission of the flexural wave acting on the first structure to the second structure.

Described is a system for transmitting a flexural wave acting on one structure to another structure. In one example, a system includes a first structure having a first property and a first end and a second structure having a second property and a second end connected to the first end of the first structure. The first property is different from the second property and may be related to the material and/or geometric properties of the first and second structures. A mechanical resonator is connected to the first structure at a distance from the first end of about a quarter-wavelength of the frequency of a flexural wave acting on the first structure. The mechanical resonator matches a first mechanical impedance of the first structure to a second mechanical impedance of the second structure to allow high transmission of the flexural wave acting on the first structure to the second structure.

A gyroscope-based rotation damper for a motor vehicle, includes a flywheel that is driven via a drive, rotates around an axis of rotation at an angular velocity (ω.sub.φ), the flywheel being mounted in a gimbal on the motor vehicle structure by way of a first bearing element and a second bearing element. The flywheel is mounted rotatably around the angle of rotation (φ) at the first bearing element, and the first bearing element is rotatably mounted at the second bearing element around a first angle of rotation (θ) around a first axis aligned orthogonal to the axis of rotation of the flywheel, and the second bearing element is mounted rotatably around a second angle of rotation (ψ) around a second axis aligned orthogonal to the first axis, as well as a controller unit for controlling a shaft drive.

A gyroscope-based rotation damper for a motor vehicle, includes a flywheel that is driven via a drive, rotates around an axis of rotation at an angular velocity (ω.sub.φ), the flywheel being mounted in a gimbal on the motor vehicle structure by way of a first bearing element and a second bearing element. The flywheel is mounted rotatably around the angle of rotation (φ) at the first bearing element, and the first bearing element is rotatably mounted at the second bearing element around a first angle of rotation (θ) around a first axis aligned orthogonal to the axis of rotation of the flywheel, and the second bearing element is mounted rotatably around a second angle of rotation (ψ) around a second axis aligned orthogonal to the first axis, as well as a controller unit for controlling a shaft drive.