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프로니 해석을 이용한 브레이크 MoC 래틀 소음의 신뢰성 시험 방법

Title
프로니 해석을 이용한 브레이크 MoC 래틀 소음의 신뢰성 시험 방법
Other Titles
Reliability test method using Prony Analysis of brake MoC rattle noise
Author
이재철
Alternative Author(s)
Jaecheol Lee
Advisor(s)
박준홍
Issue Date
2015-02
Publisher
한양대학교
Degree
Master
Abstract
The research of Noise, Vibration and Harshness (NVH) characteristics has been ongoing for the improved brake systems in the vehicle development field. Especially, brake rattle noise is one of the most important noises to make passengers annoyed and needs to be resolved. However, brake systems are complicated due to enlargement and electrification of them. This paper is introduced to rattle noise of Motor on Caliper (MoC) a combination of conventional brake and Electric Parking Brake (EPB). Moreover, a test method by using a quite shaker to simulate a real vehicle condition is introduced and the rattle noise is analyzed at the occurred condition. Basically, natural frequencies of two different plates are measured and Sound Pressure Level (SPL) and acceleration of time signals are acquired when they are impacted each other. Then both the time signals are analyzed to frequency domain and were considered to be main factors influencing the rattle noise. In conclusion, the limit of existing Fast Fourier Transform (FFT) is mentioned and to estimate dominant frequencies of rattle noise, Prony analysis (Prony’s method) is applied and verified for difference between new and half pad test. Finally, Aging test was conducted to confirm the vulnerable characteristics of MoC rattle noise by using Prony analysis as well.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/128940http://hanyang.dcollection.net/common/orgView/200000426693
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > MECHANICAL CONVERGENCE ENGINEERING(융합기계공학과) > Theses (Master)
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