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http://dx.doi.org/10.7782/JKSR.2011.14.6.495

Evaluation of Ride Comfort in Time Domain by Using z-Transform  

Kim, Young-Guk (한국철도기술연구원 차세대고속철도기술개발사업단)
Kim, Seog-Won (한국철도기술연구원)
Park, Chan-Kyoung (한국철도기술연구원)
Kim, Sang-Soo (한국철도기술연구원)
Kim, Ki-Hwan (한국철도기술연구원)
Publication Information
Journal of the Korean Society for Railway / v.14, no.6, 2011 , pp. 495-500 More about this Journal
Abstract
In evaluating the ride comfort of railway vehicles, relationship between passenger's feeling and vibration characteristics is very important because human feeling is dependent on frequency spectrum of vibration. Therefore, the weighing curves in frequency domain are used to evaluate the ride comfort of railway vehicles. These curves have been defined in the Laplace transfer functions. It is necessary to convert the Laplace weighing function to the z weighing function in order to obtain the rms value in the time domain. In the present paper, we have applied Tustin's approximation to transform the Laplace weighing function to the z weighing and validated this method by reviewing the various cases.
Keywords
Ride comfort; Ride index; Statistical evaluation method; Frequency weighting curve; Transfer function; analogdigital transform; Tustin's approximation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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