Equivalent comfort contours for vertical vibration of steering wheels: Effect of vibration magnitude, grip force, and hand position

Morioka, Miyuki; Griffin, Michael J.

doi:10.1016/j.apergo.2008.06.001

Cited by 19 publications

(11 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is some evidence that equivalent comfort contours can be influenced by grip force, with increased sensitivity at high frequencies when increasing grip force with low magnitude vibration 27) . Hand posture can also be expected to have an effect, especially at lower frequencies where the transmission of vibration to the torso can be reduced by bending of the elbow.…”

Section: Effect Of Vibration Magnitudementioning

confidence: 99%

See 1 more Smart Citation

Frequency-dependence of Psychophysical and Physiological Responses to Hand-transmitted Vibration

Griffin

2012

Ind Health

Self Cite

View full text Add to dashboard Cite

This invited paper reviews experimental studies of the frequency-dependence of absolute thresholds for the perception of vibration, equivalent comfort contours, temporary changes in sensation caused by vibration, and reductions in finger blood flow caused by hand-transmitted vibration. Absolute thresholds depend on the contact conditions but for a typical hand grip the thresholds show greatest sensitivity to acceleration around 125 Hz. The frequency-dependence of discomfort caused by hand-transmitted vibration depends on vibration magnitude: similar to absolute thresholds at low magnitudes, but the discomfort at higher magnitudes is similar when the vibration velocity is similar (at frequencies between about 16 and 400 Hz). Hand-transmitted vibration induces temporary elevations in vibrotactile thresholds that reflect the sensory mechanisms excited by the vibration and are therefore highly dependent on the frequency of vibration. Handtransmitted vibration reduces finger blood flow during and after exposure; when the vibration velocity is similar at all frequencies there is more vasoconstriction at frequencies greater than 63 Hz than at lower frequencies. A single frequency weighting cannot provide a good indication of how all effects of hand-transmitted vibration depend on vibration frequency. Furthermore, a single frequency weighting provides only an approximate indication of any single response, because many factors influence the frequency-dependence of responses to hand-transmitted vibration, including the magnitude of vibration, contact conditions, and individual differences. Although the frequency weighting in current standards extends from 8 to 1,000 Hz, frequencies greater than 400 Hz rarely increase the weighted value on tools and there is currently little psychophysical or physiological evidence of their effects.

show abstract

Section: Effect Of Vibration Magnitudementioning

confidence: 99%

“…[25][26][27] ) and show that other factors affect the frequency-dependence of the discomfort caused by handtransmitted vibration.…”

Section: Frequency-dependence Of Equivalent Comfort Contoursmentioning

confidence: 99%

Frequency-dependence of Psychophysical and Physiological Responses to Hand-transmitted Vibration

Griffin

2012

Ind Health

Self Cite

View full text Add to dashboard Cite

show abstract

“…15 The way in which steering wheel vibration affects comfort is complex and depends on the magnitude, frequency and direction of vibration; the location of contact with the hands; and the posture of the hands. 1 Dynamic instability of the vehicle's engine, steering rods and other mechanical systems is a key factor in the increase in magnitude of steering vibration. 16 The studies conducted by Adewusi et al, 17 Aldien et al, 18 and Marcotte et al 19 on the steering wheel handle have shown that the effects of HAV on the human hand-arm system depends on various factors, such as handle size, hand-handle contact force, grip forces, handarm posture, and direction and magnitude of vibration.…”

Section: Selection Of Data For Analysis Of Hav In Steering Wheelsmentioning

confidence: 99%

“…While vibration in steering wheels can give drivers tactile feedback on the conditions of the vehicle and road, it may affect the driver's judgments of ride comfort. 1 Hence, one of the many critical areas of noise, vibration, and harshness (NVH) is the discomfort felt from vibration in the steering wheel as a driver drives his/or her vehicle. 2 Tests were performed on Malaysian Army (MA) three-tonne trucks (shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Of Hand-Arm Vibration

Aziz

Nuawi²,

Nor

2017

IJAV

View full text Add to dashboard Cite

This paper aims to describe the development of a statistical analysis method called the integrated kurtosis-based algorithm for a Z-notch filter (I-kaz) Vibro for monitoring hand-arm vibration (HAV) in Malaysian Army (MA) three-tonne truck steering wheels. HAV from the steering wheel was measured using a single axis piezoelectric accelerometer that was connected to a Brüel & Kjaer Type 3649 vibration analyser. The raw acceleration data was integrated to obtain velocity data and reintegrated to obtain displacement data. The data was analysed using I-kaz Vibro to determine the vibration values in relation to varying speeds of the truck and to determine the degree of data scattering for three-axial raw data signals for acceleration, velocity, and displacement in the x-, y-, and z-axes, respectively. Based on the results obtained, HAV experienced by the drivers can be presented using daily vibration exposure A(8), the I-kaz Vibro coefficient (Z −

show abstract

“…Many aspects of vibrotactile perception have been studied in great detail: detection threshold [21], [22], [25], [30], perception of strength and equal sensation curve [11], [19], frequency discrimination [18], [27], the influence of grip force [10], [24], level of annoyance [25], and others. Most previous studies, if not all, used devices that were rigidly fixed and subjected to continuous vibration signals.…”

Section: Related Workmentioning

confidence: 99%

Perceived Vibration Strength in Mobile Devices: The Effect of Weight and Frequency

Yao

Grant

Cruz

2010

IEEE Trans. Haptics

View full text Add to dashboard Cite

Abstract-This paper addresses the question of strength perception for vibration signals used in mobile devices. Employing devices similar to standard cell phones and using pulsed vibration signals to combat adaptation effects, experiments were performed to study the effect of weight and underlying vibration frequency on perceived strength. Results shows that for the same measured acceleration on the device, a heavier box is perceived to vibrate with greater strength. Furthermore, signals with higher underlying frequency are perceived to be weaker for the same measured acceleration. While our results are consistent with previous studies, they are obtained for the specific condition of ungrounded, vibrating objects held in the hand. Our results suggest the need for a systematic correction law for use by designers to specify the vibratory characteristics of a device as a function of its weight and of the desired operating frequency.

show abstract

Equivalent comfort contours for vertical vibration of steering wheels: Effect of vibration magnitude, grip force, and hand position

Cited by 19 publications

References 30 publications

Frequency-dependence of Psychophysical and Physiological Responses to Hand-transmitted Vibration

Frequency-dependence of Psychophysical and Physiological Responses to Hand-transmitted Vibration

Monitoring Of Hand-Arm Vibration

Perceived Vibration Strength in Mobile Devices: The Effect of Weight and Frequency

Contact Info

Product

Resources

About