8 8 Technical Acoustics Vol., No. Aug., 8,,, (, 8) :,,,,,, : ; ; : TB;U.+ 9 : A : -(8)--- Noise and vibration tests for fuel cell vehicel and noise sources identification SHEN Xiu-min, ZUO Shu-guang, CAI Jian-jiang, FENG Qing (Tongji University, Shanghai 8, China) Abstract: Noise and vibration tests for fuel cell vehicle are made by respectively acquiring the vibration and noise signals when it is independently working with the air auxiliary system and the hydrogen auxiliary system. Through spectrum analysis it is identified that the air auxiliary system, the hydrogen auxiliary system and the cooling water pump are the main vibration and noise sources of the fuel cell vehicle. Some effective improvement programs, especially for the fan and the cabinet of hydrogen auxiliary system, and some feasible scheme to reduce noise and vibration of the vehicle are proposed. So it is useful to reduce noise and vibration for fuel cell vehicle by determining the noise and vibration sources, which are identified with the modern signal analysis technology. Key words: fuel cell vehicle; air auxiliary system; hydrogen auxiliary system; vibration and noise [],,,,,,,,,,, %, Florida Matheny :--; :8-- : 8 (AA),, (SG) (PEMFC) : (98-),,,, : ;E-mail:sxm_@.com,
:,,.m,.m m [],,,, Fig. Reference points arrangement in and, out of the vehicle. ( ), ( ) () rpm~8rpm,, 8 :,, rpm~8rpm rpm :rpm,rpm,8rpm,rpm, rpm,rpm,rpm,8rpm 8 Fig. Structure of fuel cell vehicle,,,,,, [,],, Head SQlab ( ), PCB icp, : B&K. : ( ) ( ).m () rpm~8rpm., [],, ()
8 (ω/) n=f (),, ω-,r/min;n- ;f-,hz,.. ~ EBU.,..8 :.. 98Hz Hz. ( rpm 8rpm,.. 8rpm ),.. () n=,..8., 8.,., Hz....... 8 front-out-noise..... 8...... Fig. Noise in front of the vehicle Fig. left-out-noise..8.....8... Noise in left side of the vehicle Fig. Noise of the driver right ear Fig. rear-seat-noise....... 8 /db(a) 9 8 Noise of the passen-gers right ear 8 8 /rmp Fig. Noise of reference points in and out of the vehicle......
:.8.....8... 8 fan-f-noise 8 Fig.8 Noise near the fan filter-noise 8 8 9 Fig.9 Noise near the filter.....8... 9 8 /(m/s (A)) Vertical vibration acceleration spectrum of the fan,, 8 9, Hz,, Hz~Hz, 98Hz~Hz ( rpm~8rpm ) [],,, Hz,.. rpm~8rpm,, ; ~, Hz~Hz, 98Hz~Hz,, ; Hz~Hz,,,.. 8 Fig. Fig. 8 8rpm(.-88.).Transfer Function DFT 89.%,HAN... H>....8... 8 9 Transfer function from the fan to the body
8,., :(),,, ;(), air ass vib (.-8.s).FFT vs Time (8.%,HAN) m interior front m,.m -8rpm(.-9.s).FFT vs Time (8.%,HAN) front-out.. 8 Fig. Noise in front of the vehicle -8rpm(.-9.s).FFT vs Time (8.%,HAN) left-out.. 8 Fig. Noise of the passengers right ear air ass vib (.-8.s).FFT vs Time (8.%,HAN) fan rear mic... 8 Fig. Noise in left side of the vehicle air ass vib (.-8.s).FFT vs Time (8.%,HAN) interior front m m.m Fig. Noise of the driver s right ear Fig. Noise near the fan -8rpm(.-9.s).FFT vs Time (8.%,HAN) Fig. Noise near the filter 9. 9 8. 8..
:.,,,,,, 8, Table Noise of reference points in and out of the vehicle Hz,, Hz~8Hz,, /Hz 9. 9. /db(a).8. 8..,,, Hz, Hz( ),,,,,, ; box acc compare Hz~Hz, 9Hz. ( ),.., 9.,.Hz Hz~Hz ( Hz 9Hz Hz) 8 (Hz), Hz ( 9 Fig.9 Vibration acceleration of the hydrogen ), position car ref point mic compare..... 8 8 Fig.8 Noise spectrum of reference points in and out of the vehicle...8.....8... /(m/s (A)) position Fig. Noise of the hydrogen auxiliary system... auxiliary system..... position 8......
8 Table Noise and vibration of hydrogen Table Noise comparison before and after improved auxiliary system /db(a) /db(a). 9........ 9..9 8.. 8. 8. 9. 9. 8. 8.9 8 8. 8. 8.8 8 8. 8. 89. 8 /(m/s ) /db(a)..... [] Matheny M S, Erickson P A, Niezrecki C, et al. Interior and Ex terior noise emitted by a fuel cell transmit Bus [J]. Journal of Sound and Vibration,, (). [],,,. 8 [J].,, (): -. YAN jiao, ZUO Shuguang, CHEN Yousong, et al. Experimental analysis and control to the rear interior noise of Fig. Transfer function from hydrogen pump to body frame the fuel cell vehicle [J]. Noise and Vibration Control in :, Chinese,, (): -., [],,, [J].,, 9(): -8. GUO Rong, WAN Gang, ZUO Shuguang, et al. An experimental study on noise sources identification for fuel cell,, vehicle[j]. Automotive Engineering in Chinese,, 9 (): -8.,,, [],, [J].,.,. [,8],,, (): -. ZUO Yanyan, ZENG Falin, GUO Jianxin, et al. An experimental research on interior noise of light bus [J]. Auto-, motive Engineering,, (): -. (in Chinese). []. SQ,, (): -8., WU Wen jiang. Noise source judgement of SQ type light car[j]. Noise and Vibration Control in Chinese,, (): -8. []. [M]., 999. XU Kuichang. Fan noise control [M]. Beijing: Machinery Industry Press. 999. [J]. : [],. [M].,. ( ) ( JIN Xiaoxiang, ZHANG Lijun. Prediction and control of ) vehicle noise[m]. Shanghai: Tongji University Press.. [8],,,. - [M]. :,.., PANG Jian, CHEN Gang, HE Hua. Vehicle noise and vibrator-theory and application [M]. Beijing: Institute of Technolorgy Press... :