Method for determining a dangerous driving indicator of a vehicle

Patent metadata

Field	Value
Publication number	US-10414409-B2
Application number	US-201615738490-A
Country	US
Kind code	B2
Filing date	May 27, 2016
Priority date	Jun 26, 2015
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

The present invention determines at least one dangerous driving indicator by use of a physical model based on the dynamics of a vehicle. According to the invention, a dynamic model of the vehicle determines a slip parameter of the vehicle, which deduces a representative dangerous driving indicator.

First claim

The invention claimed is:

1. A method of determining at least one dangerous driving indicator of a vehicle, comprising:
a) measuring at least one of position and altitude of the vehicle;
b) constructing a dynamic model of the vehicle linking at least one of the position and the altitude of the vehicle to at least one slip parameter of the vehicle;
c) determining the at least one slip parameter of the vehicle by use of the dynamic model and at least one of the measured position and the altitude; and
d) determining at least one dangerous driving indicator of the vehicle by use of the at least one slip parameter; and wherein
the at least one dangerous indicator is determined by at least one of a number of times and frequency exceeding at least one threshold by the slip parameter.

2. The method as claimed in claim 1 , comprising using a geolocation system to measure at least one of the altitude or the position of the vehicle.

3. The method as claimed in claim 2 , comprising determining the dangerous driving indicator by determining at least one of a number of times and a frequency of exceeding at least one threshold by the slip parameter.

4. The method as claimed in claim 1 , comprising preprocessing at least one of the measurements of the position and the altitude prior to determining the at least one slip parameter.

5. The method as claimed in claim 4 , comprising determining the dangerous driving indicator by determining at least one of a number of times and a frequency of exceeding at least one threshold by the slip parameter.

6. The method as claimed in claim 4 , wherein the preprocessing comprises using at least one of oversampling and filtering.

7. The method as claimed in claim 1 , wherein the dynamic model of the vehicle is a model which disregards width of the vehicle.

8. The method as claimed in claim 7 , comprising determining the dangerous driving indicator by determining at least one of a number of times and a frequency of exceeding at least one threshold by the slip parameter.

9. The method as claimed in claim 1 , wherein the at least slip parameter of the vehicle is at least one of lateral slip angle of the vehicle and longitudinal slip rate of the vehicle.

10. The method as claimed in claim 9 , wherein the dynamic model of the vehicle determines the lateral slip angle β by a formula:

β
⁡

(
i
)

=

v
fy

⁡

(
i
)

+

v
ry

⁡

(
i
)

2
*

v
L

⁡

(
i
)

with:
i being an instant of calculation,
v fy being a projection on an axis of speed of a front wheel of the vehicle,
v ry being a projection on an axis of speed of a rear wheel of the vehicle, and
v L being a projection on a longitudinal axis of the vehicle of speed of the vehicle with the projection of the speeds being a function of the position of the vehicle.

11. The method as claimed in claim 10 , wherein the projection of the speeds are determined by relationship:

v
ry

⁡

(
i
)

=

v
T

⁡

(
i
)

-

l
r

*

ω
⁡

(
i
)

,

⁢

v
fy

⁡

(
i
)

=

(

v
T

⁡

(
i
)

+

l
f

*

ω
⁡

(
i
)

)

*
cos
⁢

⁢

α
⁡

(
i
)

-

v
L

Assignees

• Ifp Energies Now

Inventors

• Thibault Laurent
• Moulin Philippe

Classifications

• B60W2555/40

  Altitude · CPC title

• B60W2555/20

  Ambient conditions, e.g. wind or rain · CPC title

• B60W2552/40

  Coefficient of friction · CPC title

• B60W2552/15

  Road slope, i.e. the inclination of a road segment in the longitudinal direction · CPC title

• B60W2510/207

  Oversteer or understeer · CPC title