scholarly journals Effects of Whole-body Vibration in a Low Frequency Range

1994 ◽  
Vol 30 (Supplement) ◽  
pp. 272-273
Author(s):  
Masashi Uchikune ◽  
Yoshiyuki Yoshida ◽  
Sachiko Shirakawa
Keyword(s):  
Whole Body Vibration ◽  
Low Frequency ◽  
Whole Body ◽  
Frequency Range ◽  
Body Vibration

scholarly journals Effects of Whole-body Vibration in a Low Frequency Range

1993 ◽  
Vol 29 (Supplement) ◽  
pp. 488-489
Author(s):  
Masashi Uchikune ◽  
Yoshiyuki Yoshida ◽  
Sachiko Shirakawa ◽  
Shuho Su
Keyword(s):  
Whole Body Vibration ◽  
Low Frequency ◽  
Whole Body ◽  
Frequency Range ◽  
Body Vibration

Reduction of Whole Body Vibration in a Wide Frequency Range Using Inflation Pressure Control of Air Bladder Cushion

2021 ◽  
Author(s):  
Pavan Nuthi ◽  
Yixin Gu ◽  
Aida Nasirian ◽  
Alexandra Lindsay ◽  
Himanshu Purandare ◽  
...  
Keyword(s):  
Whole Body Vibration ◽  
Wide Frequency Range ◽  
Whole Body ◽  
Frequency Range ◽  
Inflation Pressure ◽  
Cell Array ◽  
Frequency Sweep ◽  
Body Vibration ◽  
Vibration Attenuation ◽  
Vibration Attenuation Performance

Abstract Several types of interfaces like foam and inflated air cells exist to reduce the effect of mechanical vibration experienced in human-machine interfaces in different scenarios such as transportation. However, their vibration attenuation performance in a wide frequency range relevant to whole body vibration (1–80 Hz) leaves much to be desired. In this study, we investigate the effect of inflation pressure on the vibration attenuation behavior of an air cell cushion. An experimental setup capable of conducting frequency sweep tests and regulating inflation pressure in an air cell array cushion was developed. Frequency sweep tests were conducted at various inflations and the vibration transmissibilities at static inflations were plotted. A dynamic inflation scheme was developed based on the apriori knowledge of inflation dependent transmissibilities. Furthermore, the closed loop behavior of the inflation scheme was evaluated with a frequency sweep test. The resulting closed loop transmissibility indicated better vibration attenuation performance than any single static inflation for the air cell array cushion in the range of frequencies relevant to whole body vibration. This result lays the groundwork for potential air cell cushions which modify their inflation dynamically through a direct feedback from sensors like accelerometers to attenuate vibration in a wide frequency range.

Subjective Response to Whole-Body Vibration

1982 ◽  
Vol 1 (3) ◽  
pp. 109-122
Author(s):  
Richard W. Shoenberger
Keyword(s):  
Resonance Frequency ◽  
Magnitude Estimation ◽  
Whole Body Vibration ◽  
Alternative Methods ◽  
Whole Body ◽  
Vibration Exposure ◽  
Subjective Response ◽  
Frequency Range ◽  
Body Vibration ◽  
Subjective Intensity

Pioneer studies of subjective response to whole-body vibration were mainly directed toward construction of equal intensity contours, described by such subjective labels as “intolerable,” “alarming,” or “annoying.” In a series of more recent investigations, carried out at AFAMRL, psychophysical measurement and scaling techniques have been adapted for use in whole-body vibration experiments, primarily to evaluate the intensive dimension of various types of vibration environments. A program of research is described in which the methods of magnitude estimation and intensity matching have been used to construct a family of Z-axis equal intensity curves in the whole-body resonance frequency range; investigate subjective response for frequencies below 1 Hz; evaluate alternative methods for assessing the severity of multifrequency and random vibrations; and compare the subjective intensity of vibrations in various translational and angular modes. Results from these experiments have contributed to the expansion and improvement of whole-body vibration exposure criteria.

Sign in / Sign up

Export Citation Format

Share Document