Vibration Control Articles

109 Results found
  • Category: Health & Safety ×

  • Subcategory: Vibration Control ×

Modelling and control of four and six DOF active engine mount system using (PID and LQR)

by Inderscience Publishers  (Nov. 3, 2014)

In this paper, classical and modern controllers have been introduced on three different engine models starting form a moderately realistic four degree of freedom model and then a realistic six degree of freedom model, two control techniques were implemented on the different systems namely proportional integral derivative (PID) and linear quadratic ...

Vibratec`s Continuous Efforts in Reducing Noise and Vibration

by Vibratec Asia Pacific Sdn Bhd  (Sep. 23, 2014)

As the well-known leader in the noise and vibration field, Vibratec has been working in improving the vibration level in electric vehicles with ADETEL Group and CEDRAT to commercialize a serie of vehicle from RENAULT. Vibratec has a level of technology that is better than the other key players of German's automobile industry, however, this ...

Industrial Noise and Vibration: High-speed balancing - Case Study

by Sulzer Ltd  (Sep. 19, 2014)

Dynamic balancing of rotating elements is an important aspect of the manufacture and the repair of any turbomachinery. A rotating element that is out of balance can cause major operational difficulties, which may prevent the timely start-up of a facility. Furthermore, the unbalanced element can cause internal damage that will rob a machine of its ...

A combined technique for rotor broken bar diagnosis in VSD equipped with vibration reducers

by Inderscience Publishers  (May 29, 2014)

Broken rotor bar is a common fault in squirrel cage induction motors. Rotor failures due to that fault now account for a moderate percentage of total induction motor failures. This paper will deal with detection of broken rotor bar of induction motor supplied from variable speed drive (VSD) equipped with AC reactor and sine–wave shaping filter on ...

Bearing fault severity estimation using time–based descriptors for rotating electric machines

by Inderscience Publishers  (May 29, 2014)

This paper evaluates the bearing fault severity in rotating electric machines based on the time–based descriptors derived from machine vibration signal. Time–based descriptors are independent of bearing dimensions and machine dynamics. To establish the relationship between the time–based descriptor and bearing fault severity, a wide range of ...

Marine Monitoring to Maximise the Performance of Marine Machinery

by Hansford Sensors  (Apr. 25, 2014)

Considering the cost of putting to sea, it is well worth investing in vibration monitoring equipment that can help engineers to protect and maximise the performance of marine machinery. Here, we discuss the challenges facing engineers and offers advice on how to successfully install and use vibration sensing equipment on marine vessels. As ...

Intensification of flotation treatment by exposure to vibration

by IWA Publishing  (Apr. 10, 2014)

In this paper, an intensification of wastewater flotation treatment by exposure to vibration is studied. Exposure to vibration results in the decrease of air bubble size, increase of air flow through the aerator and more even dispersion of air bubbles in water. This intensifies the aeration process, thus significantly improving the treatment ...

Vibrational and quantum chemical investigations of 4.6–dimethyldibenzothiophene

by Inderscience Publishers  (Mar. 31, 2014)

To study the characteristics of the thiophene sulphides in coals, the structures and properties of 4.6–DMDBT were investigated by using density functional theory (DFT) approach in the research, the following results can be illustrated, namely, the geometry parameters, vibration frequencies, total density of states and partial density of states, ...

Measurement and bio–dynamic model development of seated human subjects exposed to low frequency vibration environment

by Inderscience Publishers  (Mar. 5, 2014)

In this study, the effect of posture, vibration magnitude and frequency on seat–to–head (STH) and back support–to–head (BTH) transfer functions has been studied under vertical sinusoidal vibration. Twelve healthy male subjects participated in experimental work to measure vertical vibration transmitted to the occupants' heads in three ...

Intensification of the technological processes by ABC-100: powder industry

by PC GlobeCore  (Jan. 31, 2014)

The main technological advantage of the powder metallurgy industry is usage of different metals and its alloy combination, metalloids, metal-to-nonmetal joins and others materials like feed stock for the powder material production. Treatment, mixing, dispersing of those components require a lot of time, energy and material costs. In many cases, ...

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