基于频率加权滤波的汽车平顺性评价  

Evaluation of vehicle ride comfort based on frequency weighted filtering

作　　者：宗长富[1] 陈双[1] 冯刚 尹刚 向晖 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,长春130022 [2]重庆长安汽车股份有限公司汽车工程研究院,重庆401120

出　　处：《吉林大学学报（工学版）》2011年第6期1517-1521,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：'863'国家高技术研究发展计划项目(2006AA110102)

摘　　要：基于无限脉冲响应数字滤波器理论,根据ISO2631-1:1997(E)标准中频率加权系数设计了一个频率加权滤波器。通过频率加权滤波器对加速度时间信号进行滤波,获得加权加速度的时域数据和振动的峰值系数。通过分析,在随机振动下,各轴向的振动峰值系数一般不超过9,可用基本评价方法评价汽车平顺性;在冲击振动下,座椅、座椅导轨和脚下地板垂直方向的振动峰值系数超过9,需采用辅助评价方法进行平顺性评价。分析结果表明:通过频率加权滤波器进行滤波,可以实现汽车行驶平顺性的时域加权评价,改善传统频域加权评价方法无法获得峰值系数的不足,提高了汽车平顺性评价的准确性。Based on the infinite impulse response digital filter theory,a frequency weighting filter was designed according to the frequency weighting factors in the standard ISO2631-1：1997（E）.The weighted acceleration data in the time-domain and the crest factor of vibration were obtained by the filtering of the time-domain acceleration signal using the fuequency weighted digital filter.The analyses showed that the crest factor of the vibration in all axes is lower than 9 under random vibration,the basic evaluation method can be used to evaluate the vehicle ride comfort.Under the conditions of occasional shock and transient vibration,the crest factors in the vertical direction of the seat,the seat rail and the under-seat floor will be higher than 9,and the additional evaluation method should be used.The results showed that the vehicle ride comfort weighted evaluation in time-domain can be achieved by the frequency weighted digital filtering,it can compensate the inadequacy of the traditional weighted evaluation method in frequency domain in being unable to get the crest factor,and enhance the accuracy of vehicle ride comfort evaluation.

关 键 词：车辆工程 频率加权滤波器 峰值系数 数字滤波器 平顺性 评价 

分 类 号：U461.4[机械工程—车辆工程]