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.

Vibration sensor film, vibration actuator film, vibration reduction film, and multilayer film using them

Abstract: A vibration reduction system has a vibration reduction film and a control unit. The vibration reduction film is constituted of a vibration sensor film, an insulating layer, and a vibration actuator film that are stacked in this order. In each of the vibration sensor film and the vibration actuator film, two pairs of electrodes are formed on both surfaces of a piezoelectric polymer film into a pattern based on a particular mode of vibration. The electrodes of the vibration sensor film overlap with the electrodes of the vibration actuator film. In response to electric charge signals from the electrodes of the vibration sensor film, the particular mode of vibration is detected. By application of voltages into the electrodes of the vibration actuator film, a vibration of opposite phase is generated to counteract the detected vibration.

A study of a beam-like electromagnetic vibration absorber:

Abstract: This paper presents a study of a beam-like semi-active electromagnetic vibration absorber (EVA). The EVA consists of a flexible ferromagnetic cantilever beam, a ferromagnetic mass attached to the f...

Modeling and simulation of active-controlled heave compensation system of deep-sea mining based on dynamic vibration absorber

Abstract: The heave compensation system is of great importance to the safety and operation efficiency of the deep-sea mining system subject to irregular-wave excitation. A novel active-controlled heave compensation system based on dynamic vibration absorber for the deep-sea mining system was proposed in this paper. The three-degree-of-freedom dynamic models of active heave compensation system based on dynamic vibration absorber in sinusoidal wave are established. An optimal controller was designed for the proposed system by using Linear-quadratic optimization technique. The performance of the active heave compensation system based on dynamic vibration absorber was computed and analyzed. It is indicated that the heave compensator based on dynamic vibrator absorber with the optimal controller can have the best performance of heave compensation and it is practical to isolate the lift pipe and its support platform from the significant vibration of the ship motion induced by the sinusoidal wave.

Tuned broadband particulate vibration absorber

Abstract: Broadband particulate absorbers include a suspended container for containing particulate beads that absorb vibration energy over a broad bandwidth so reduce coupled vibrations of mechanical systems over the broad bandwidth. The absorbers preferably include two opposing aluminum containers for containing particulate teflon beads. The aluminum containers are suspended and separated by aluminum I-beams attached to stringers of a rocket subjected during lift off to atmospheric pressure vibrations exerted on the vehicular skin coupling vibration through the stringers to trusses supporting sensitive inertial navigation payloads. The absorbers can be finely tuned using variably thick mass or various amounts of beads for reducing peak vibrations coupled into the payloads.