路面国际不平度指数的两种描述及其应用*

doi:10.19562/j.chinasae.qcgc.2020.08.014

汽车工程 ›› 2020, Vol. 42 ›› Issue (8): 1097-1102.doi: 10.19562/j.chinasae.qcgc.2020.08.014

路面国际不平度指数的两种描述及其应用^*

张振伟^1,2, 陈涛¹, 王文竹^1,3, 赵旗¹, 李杰¹

1.吉林大学,汽车仿真与控制国家重点实验室,长春 130025;
2.重庆长安汽车股份有限公司,重庆 400023;
3.沈阳航空航天大学机电工程学院,沈阳 110136

收稿日期:2019-09-19 出版日期:2020-08-25 发布日期:2020-09-24
通讯作者: 李杰,教授,博士,博士生导师,E-mail:lj@jlu.edu.cn。
基金资助:
*省校共建项目(SXGJSF2017-2)、汽车仿真与控制国家重点实验室开放基金项目(20180217)、中国汽车产业创新发展联合基金重点项目(U1564213)和国家自然科学基金国际(地区)合作与交流重点项目(61520106008)资助。

Two Descriptions of International Roughness Index of Road and Their Application

Zhang Zhenwei^1,2, Chen Tao¹, Wang Wenzhu^1,3, Zhao Qi¹, Li Jie¹

1. Jilin University, State Key Laboratory of Automotive Simulation and Control, Changchun 130025;
2. Chongqing Chang'an Automobile Co., Ltd., Chongqing 400023;
3. School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang 110136

Received:2019-09-19 Online:2020-08-25 Published:2020-09-24

摘要/Abstract

摘要： 为理解和应用路面国际不平度指数,研究了路面国际不平度指数的时间域和时间频率域描述。基于路面国际不平度指数的标准车辆模型,建立了路面国际不平度指数的时间域描述和车辆模型的运动微分方程。在空间频率域,建立了路面不平度功率谱密度表示;在时间频率域,建立了路面激励功率谱密度表示。通过路面国际不平度指数标准车辆模型推导出悬架动挠度速度的频率响应表示,建立了路面国际不平度指数的时间频率域表示,分析证明了路面国际不平度指数和路面激励功率密度等效。利用美国LTPP项目实测路面不平度数据,求取了路面国际不平度指数时间域和时间频率域的结果,通过两者对比说明了国际不平度指数时间频率域描述的正确性和有效性,对实测路面不平度数据引入中值滤波可更好确定时间频率域路面国际不平度指数。

关键词: 路面国际不平度指数, 时间域描述, 时间频率域描述, 路面统计特性, LTPP项目

Abstract: In order to understand and apply international roughness index of road, the time domain description and time frequency domain description of international roughness index of road are studied. Based on the standard vehicle model of international roughness index of road, the time domain description of the international roughness index of road and the differential equations of motion for the vehicle model are established. In space frequency domain, the power spectral density representation of road roughness is established; in time frequency domain, the power spectral density representation of road excitation is established. Frequency response expression of suspension dynamic deflection velocity is derived from the standard vehicle model, and the time frequency domain expression of international roughness index of road is built. It is proved by analysis that the international roughness index of road is equivalent to power density of road excitation. Using the measured road roughness data of LTPP project in the United States, the international roughness index of road in time domain and time frequency domain are obtained. By comparison of the two, the correctness and validity of the description of the time frequency domain of the international roughness index of road are proved. The international roughness index of road in time frequency domain can be better determined by introducing median filter into the measured road roughness data.

Key words: international roughness index of road, time domain description, time frequency domain description, statistical characteristics of road, LTPP project

张振伟, 陈涛, 王文竹, 赵旗, 李杰. 路面国际不平度指数的两种描述及其应用^*[J]. 汽车工程, 2020, 42(8): 1097-1102.

Zhang Zhenwei, Chen Tao, Wang Wenzhu, Zhao Qi, Li Jie. Two Descriptions of International Roughness Index of Road and Their Application[J]. Automotive Engineering, 2020, 42(8): 1097-1102.

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路面国际不平度指数的两种描述及其应用^*

Two Descriptions of International Roughness Index of Road and Their Application

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