Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/10109
Title: | Human subjective response to steering wheel vibration caused by diesel engine idle |
Authors: | Ajovalasit, M Giacomia, I |
Keywords: | Vibration;Engine;Idle;Subjective;Perception;Modulation |
Issue Date: | 2005 |
Publisher: | Professional Engineering Publishing Ltd |
Citation: | Proceedings of the Institution of Mechanical Engineers Part D - Journal of Automobile Engineering, 219(D4), 499 - 510, 2005 |
Abstract: | This study investigated the human subjective response to steering wheel vibration of the type caused by a four-cylinder diesel engine idle in passenger cars. Vibrotactile perception was assessed using sinusoidal amplitude-modulated vibratory stimuli of constant energy level (r.m.s. acceleration, 0.41 m/s(2)) having a carrier frequency of 26 Hz (i.e. engine firing frequency) and modulation frequency of 6.5 Hz (half-order engine harmonic). Evaluations of seven levels of modulation depth parameter m (0.0, 0.1, 0.2, 0.4, 0.6, 0.8, and 1.0) were performed in order to define the growth function of human perceived disturbance as a function of amplitude modulation depth. Two semantic descriptors were used (unpleasantness and roughness) and two test methods (the Thurstone paired-comparison method and the Borg CR-10 direct evaluation scale) for a total of four tests. Each test was performed using an independent group of 25 individuals. The results suggest that there is a critical value of modulation depth m = 0.2 below which human subjects do not perceive differences in amplitude modulation and above which the stimulus-response relationship increases monotonically with a power function. The Stevens power exponents suggest that the perceived unpleasantness is non-linearly dependent on modulation depth m with an exponent greater than 1 and that the perceived roughness is dependent with an exponent close to unity. |
URI: | http://pid.sagepub.com/content/219/4/499 http://bura.brunel.ac.uk/handle/2438/10109 |
DOI: | http://dx.doi.org/10.1243/095440705X11167 |
ISSN: | 0954-4070 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fulltext.pdf | 1.15 MB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.