Abstract
The article presents research on the damping properties of an anti-vibration platform (designed and manufactured by Stacore), which is intended for use in combination with high class audio devices. The platform comprises two parts that are capable of passive vibration damping. The design of this platform is unique and has been developed by applying several technical solutions in a combination not found on any other anti-vibration platform on the audio market. These solutions are described in the article. The first part of the platform is pneumatically operated and the second part uses ball bearings. The casing also fulfils the most important function – vibration damping. It is made of amorphous slate (known for its good vibration-damping properties) and includes a metal plate covered with a special visco-elastic layer that fulfils the role of binding material. The first part of the platform realises the pneumatic damping. It comprises four elastomer pneumatic springs, each with its own air tank. The air tanks are designed to operate at a maximum pressure of 5 bar. The second vibration-damping part of the platform is located above the first part (pneumatic) and consists of ball bearings, used for the isolation of transverse vibration, being relatively difficult to deal with pneumatic springs. The upper part consists of three bearings, each of which comprises of a polished, deep hardened steel racings and a ball made of tungsten carbide. The scientific literature describes many solutions enabling vibration damping, including many anti-vibration platforms. However, the literature lacks the descriptions of analyses conducted on anti-vibration platforms for audio devices. This article is a novelty in the literature as it concerns the experimental research aimed at verifying the vibration-damping capacity of the anti-vibration platform that can be used with audio devices owned by people who appreciate high-quality music. The article describes in detail the whole measurement procedure applied to the vibration damping platform. For research purposes, the anti-vibration platform was suspended on flexible ropes. At first, an electromagnetic vibration exciter was attached to the base on which the platform rested, and then the displacements of the upper and lower part of the platform were measured using laser sensors. Based on these signals, the vibration damping capability (transmissibility) of the platform was determined in two mutually perpendicular directions. In addition to the graph that shows the vibration damping capability of the anti-vibration platform, the signals of the applied force and displacements measured during the research are also presented in this article.
Highlights
Vibration reduction in a variety of situations improves quality of life and safety
This article focuses on anti-vibration platforms, paying particular attention to the VIBRATION DAMPING OF THE ANTI-VIBRATION PLATFORM INTENDED FOR USE IN COMBINATION WITH AUDIO/MUSIC DEVICES
The vibration exciter was connected to the plate by means of a flexible tension member, at the end of which the impedance head was mounted
Summary
Vibration reduction in a variety of situations improves quality of life and safety. In the literature, there are many articles on vibration damping for a wide range of applications. The situation described in article [1] by Paolo Clemente and Dario Rinaldis is an example They looked into the problem of protecting buildings from traffic vibrations. This is an interesting example because such vibrations can be transmitted to audio sets (which can be used, for example, in combination with the anti-vibration platform which is a research object in this paper). The authors of article [1] committed themselves to protect an ancient building in Rome against vibrations coming from road traffic. In the summary of the article, the authors point out that contemporary streets are of fairly good quality and the amplitude of vibrations coming from road traffic is low
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