Dynamic Vibration Absorber

About: Dynamic Vibration Absorber is a research topic. Over the lifetime, 4764 publications have been published within this topic receiving 49429 citations.

Active dynamic vibration absorber apparatus for vehicle

Abstract: An active dynamic vibration absorber apparatus for a vehicle that may be mounted to a frame of the vehicle and vibrates when power may be supplied to attenuate vibration of the vehicle, may include a housing, an upper spring and a lower spring, and a yoke assembly disposed between the upper spring and the lower spring which may be plates arranged in parallel, and selectively vibrates up/down in the housing, wherein the yoke assembly has an upper protrusion and a lower protrusion that protrude from the top and the bottom thereof, respectively, the upper protrusion being fastened to the center of the upper spring through the housing, and the lower protrusion being fastened to the center of the lower spring in the housing.

Rotor variable-mass frequency-modulation dynamic vibration absorber of rotating machinery

Abstract: The invention relates to a rotor variable-mass frequency-modulation dynamic vibration absorber of rotating machinery The vibration absorber is formed by a connection transmission mechanism, a mass regulating mechanism and a control system A rotating machinery rotor produces vibration in the work The rotor variable-mass frequency-modulation dynamic vibration absorber is installed at the proper position of the rotor The connection transmission mechanism installed on the rotor transmits vibration energy produced by the rotor to the mass regulating mechanism; the mass regulating mechanism keeps consistent in frequency with a rotor main system under the adjustment of the control system to cause resonance; an annular mass plate produces a dynamic response and counteracts the dynamic response on the rotor main system, so that the effects of offsetting and suppressing rotor vibration are achieved The rotor variable-mass frequency-modulation dynamic vibration absorber is unique in structure, high in reliability, stable in performance, low in maintenance frequency, flexible in installing position and good in adaptability; besides, the control system is excellent, and active control is easy to achieve

Nonlinear Control of Plate Vibrations

Abstract: A nonlinear active vibration absorber to control the vibrations of plates is investigated. The absorber is based on the saturation phenomenon associated with dynamical systems with quadratic nonlinearities and a two-to-one internal resonance. The technique is implemented by coupling a second-order controller with the plate's response through a sensor and an actuator. Energy is exchanged between the primary structure and the controller and, near resonance, the plate's response saturates to a small value. Numerical results are presented for a cantilever rectangular plate. Modal analysis is used to solve for the plate displacement. Finite-element methods are used to extract the eigenmodes of the system. A numerical study is conducted to optimize the location of the actuators to maximize its controllability. In this regard, the control gain is maximized for the PZT actuators. Furthermore, a more general method is introduced, which is based on a global measure of controllability for linear systems.© (2001) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

On the vibration analysis of power lines with moving dampers

Abstract: This work investigates the performance of a moving damper for overhead transmission lines. The damper or absorber consists of mass-spring-damper-mass system. The absorber is connected to a single c...

Three-degree-of-freedom ultralow frequency vibration absorber

Abstract: The invention provides a three-degree-of-freedom ultralow frequency vibration absorber which has a compact structure and belongs to the field of accurate vibration attenuation The vibration absorber respectively utilizes the principle that the positive and negative rigidities are connected in parallel in three degrees of freedom to realize ultralow frequency vibration attenuation, greatly reduces the rigidity of the system on the premise of ensuring the bearing capacity of the system, and realizes the ultralow inherent frequency The three-degree-of-freedom ultralow frequency vibration absorber adopts the manner that the magnetic positive rigidity and the magnetic negative rigidity are connected in parallel in the z direction and the manner that a flat spring and the magnetic negative rigidity are connected in parallel in the x direction and y direction, so that the integral structure is more compact, the ultralow inherent frequency is provided, excellent vibration attenuation effect is provided for medium-high frequency vibration interference, the low frequency vibration and the ultralow frequency vibration are effectively restrained, and the three-degree-of-freedom ultralow frequency vibration absorber is applicable to the accurate processing equipment and measuring equipment sensitive to vibrations