发明名称 |
Road surface state estimating device |
摘要 |
In order to estimate a braking force gradient in a low slip region including a steady travelling region, there is provided a device comprising a wheel speed sensor for detecting a wheel speed in a predetermined sampling period and outputting time series data of the wheel speed as a wheel speed signal, a break point frequency estimating section for estimating a break point frequency in a gain diagram that represents a frequency response of a first order lag model that approximates a transmission characteristics from road surface disturbances to wheel speed, and a braking force gradient estimating section for estimating a braking force gradient with respect to the estimated break point frequency on the basis of the map showing a relationship between braking force gradient and break point frequency stored in advance.
|
申请公布号 |
US2002059824(A1) |
申请公布日期 |
2002.05.23 |
申请号 |
US20010976163 |
申请日期 |
2001.10.15 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
ONO EIICHI;UMENO TAKAJI;SUGAI MASARU;TANAKA AKIRA;YASUI YOSHIYUKI;SAWADA MAMORU |
分类号 |
G01P3/50;B60R16/02;B60T8/172;B60T8/173;B60T8/1763;G01N19/02;(IPC1-7):G01M17/02 |
主分类号 |
G01P3/50 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|