The invention relates to an International Roughness Index (IRI) estimation method, comprising a preliminary step (10) and an IRI estimation step (20), wherein the preliminary step (10) comprises: collecting (11) a first vehicle vertical acceleration value (measured on one or more motorized vehicles (40) driven at one or more given constant rates on one or more roads or road segments associated with known IRI values or known road profiles), first vehicle geo-reference data of the measured first vertical acceleration value, and first vehicle rate data indicative of a given constant rate associated with the measured first vertical acceleration value; calculating (12) a first root mean square value of the first vehicle vertical acceleration value; and determining (13), based on the known IRI value/road profile, based on the first vehicle geo-reference and rate data and based on the first root-mean-square value, one or more vehicle transfer functions that mathematically associate the vehicle vertical acceleration root-mean-square value and the IRI value at a given constant rate. The IRI estimation step (20) comprises: acquiring (21) a second vehicle vertical acceleration value measured on a given motor vehicle (40) driven at a driving rate on a given road or road segment; calculating (22) a second root mean square value of the second vehicle vertical acceleration value; and estimating (23) an IRI value for the given road or road segment on the basis of the one or more vehicle transfer functions determined in the preliminary step (10) and on the basis of the second root mean square value and the driving rate of the given motorized vehicle (40).
本发明涉及国际粗糙度指标(IRI)估计方法,包括初步步骤(10)和IRI估计步骤(20),其中初步步骤(10)包括:收集(11)第一运载工具垂直加速度值(其是在与已知IRI值或已知道路简档相关联的一个或多于一个道路或道路段上以一个或多于一个给定恒定速率驾驶的一个或多于一个机动运载工具(40)上测量的)、所测量的第一垂直加速度值的第一运载工具地理参考数据、以及第一运载工具速率数据(其指示与所测量的第一垂直加速度值相关联的给定恒定速率);计算(12)第一运载工具垂直加速度值的第一均方根值;以及基于已知的IRI值/道路简档、基于第一运载工具地理参考和速率数据以及基于第一均方根值,确定(13)在给定恒定速率下将运载工具垂直加速度均方根值和IRI值以数学方式相关联的一个或多于一个运载工具传递函数。IRI估计步骤(20)包括:获取(21)在给定道路或道路段上以驾驶速率驾驶的给定机动运载工具(40)上测量的第二运载工具垂直加速度值;计算(22)第二运载工具垂直加速度值的第二均方根值;以及基于在初步步骤(10)中确定的一个或多于一个运载工具传递函数以及基于第二均方根值和给定机动运载工具(40)的驾驶速率,估计(23)给定道路或道路段的IRI值。
International roughness index estimation method and system
国际粗糙度指标估计方法及系统
2024-01-09
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion |
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