Topic
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.
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TL;DR: In this paper, a tunable friction damper is proposed as an alternative to a conventional sliding mass-type friction dammer, which is commonly used to reduce vibration in rotating systems.
18 citations
Patent•
04 Sep 1987
TL;DR: In this paper, a tuned array vibration absorber is constructed to absorb some of the vibrational kinetic energy and disperses the remainder over a wide range of frequencies to reduce the maximum amplitude of the vibrations that occur at any one frequency.
Abstract: A tuned vibration absorber comprises a laminated constrained layer beam formed from at least two rigid plates joined together by a layer of elastomer. One end of the laminated structure is mounted in a rigid base so that the laminated structure forms a cantilever constrained layer beam. The lamianted constrained beam is constructed so as to vibrate normal to the laminated structure at a resonance frequency that is to be dampened. The elastomer layer converts the vibrational kinetic energy into heat so that the heat can be removed. An array of tuned vibration absorbers is formed so as to damp a wide range of frequencies. The resonance frequencies of the tuned vibration absorbers are regularly spaced about the resonance frequency. The tuned array vibration absorber thus absorbs some of the vibrational kinetic energy and disperses the remainder over a wide range of frequencies to reduce the maximum amplitude of the vibrations that occur at any one frequency.
18 citations
TL;DR: A tunable dynamic vibration absorber for unbalanced rotor system which is made up of coil springs and magnetic spring is presented in this article, where the structure of the absorber is introduced and the stiffness tuning mechanism of the magnetic spring mechanism is explained.
Abstract: A tunable dynamic vibration absorber for unbalanced rotor system which is made up of coil springs and magnetic spring is presented. The structure of the absorber is introduced and the stiffness tuning mechanism of the magnetic spring is explained. A finite element model of the rotor-absorber system was built and the influencing factors to the appearance of the absorber were studied numerically. Finally, experiments were carried out to verify the numerical results, and PID control strategy was tested. The numerical and experimental results show that the present absorber is effective for vibration suppression of an unbalanced rotor system, and the control strategy is effective.
18 citations
01 Mar 1991
TL;DR: The paper discusses the design of a second order, acceleration feedback conlrollcr which acts as an active vibration absorber which provides guaranteed stability margins for collocated scnsor/acluator pairs in the absence of scns/ac[ualor dynamics and cornputalional dynamics.
Abstract: The development of control of large flexible structures technology must include practical demonstration to aid in the understanding and characterization of controlled structures in space. To support this effort, a testbed facility was developed to study practical implementation of new control technologies under realistic conditions. The design is discussed of a second order, acceleration feedback controller which acts as an active vibration absorber. This controller provides guaranteed stability margins for collocated sensor/actuator pairs in the absence of sensor/actuator dynamics and computational time delay. The primary performance objective considered is damping augmentation of the first nine structural modes. Comparison of experimental and predicted closed loop damping is presented, including test and simulation time histories for open and closed loop cases. Although the simulation and test results are not in full agreement, robustness of this design under model uncertainty is demonstrated. The basic advantage of this second order controller design is that the stability of the controller is model independent.
18 citations