نتایج جستجو برای: vibration control

تعداد نتایج: 1371792  

Journal: :The spine journal : official journal of the North American Spine Society 2015
Konstantin Beinert Martin Keller Wolfgang Taube

BACKGROUND CONTEXT People with neck pain display a diminished joint position sense and disturbed postural control, which is thought to be a result of impaired somatosensory afferent activity and/or integration. Afferent processing can be artificially manipulated by vibration and was shown to reduce motor performance in healthy subjects. However, the effect of vibration on sensorimotor function ...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 1995

Journal: :international journal of occupational hygiene 0
farough mohammadian parvin nasiri omid giahi zahra rezvani mehdi kangavari athena rafieepour

original article   noise and vibration are the common problems in industrialized countries which can affect individual's job performance. the present study aimed to investigate the combination of the whole body vibration and the noise and their effects on the students' mental performance in the laboratory setting. twenty male students of tehran university of medical sciences, tehran, iran were ...

2012
Hishamuddin Jamaluddin

This paper presents the development of an active vibration control using direct adaptive controller to suppress the vibration of a flexible beam system. The controller is realized based on linear parametric form. Differential evolution optimisation algorithm is used to optimize the controller using single objective function by minimizing the mean square error of the observed vibration signal. F...

ژورنال: ارگونومی 2018

Background: Exposure to hand-arm vibration is one of the most common physical harmful factors. The purpose of this study was Experimental study of  the level of manual performance disability caused by exposure to hand-arm vibration among automobile casting workers.  Methods: This study was performed on 53 casting workers as case group and 28 controls as control group. The measurement of the vi...

Journal: :journal of artificial intelligence in electrical engineering 0
saheleh khodabakhshi 1department of electrical engineering. ahar branch, islamic azad university, ahar, iran mahdi baradaran-nia department of control engineering, faculty of electrical and computer engineering, university of tabriz, , tabriz, iran

natural hazards such as earthquakes have threatened the life of human beings during the history.as a consequence, the vibration mitigation of structures has caught great importance. activecontrol of structures is one of the rapidly emerging areas in the concept of structural control. thispaper presents a control method to deal with this subject when the dynamics of the structure ishysteretic an...

Journal: :advances in railway engineering,an international journal 2014
mansour ziyaeifar

high speed trains are an indispensable part of rapid transportation systems in many countries. as the fastest means of transport on the ground, these trains are extremely sensitive to the terrain and track conditions. geometrical irregularities and mechanical characteristics of the track, together with inconsistencies in the lane (including bridges that support the track) are considered importa...

Journal: :Journal of applied physiology 2006
K Krajnak R G Dong S Flavahan D Welcome N A Flavahan

The vascular symptoms of hand-arm vibration syndrome, including cold-induced vasospasm, are in part mediated by increased sensitivity of cutaneous arteries to sympathetic stimulation. The goal of the present study was to use a rat tail model to analyze the effects of vibration on vascular function and alpha-adrenoceptor (AR) responsiveness. Rats were exposed to a single period of vibration (4 h...

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