Method for estimating a vehicle's velocity

• US 20040153216A1
• Filed: 01/30/2003
• Published: 08/05/2004
• Est. Priority Date: 01/30/2003
• Status: Abandoned Application

• Current Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Original Assignee: Visteon Global Technologies Incorporated (Visteon Corporation)
• Inventors: Tan, Hualin
• Application Number:
  US10/354,381
• Publication Number:
  US 20040153216A1
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60T 2250/04 Vehicle reference speed; Vehicle body speed
• CPC Class Codes: B60T 2250/06 Sensor zero-point adjustment; Offset compensation
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence

Abstract

A method for estimating velocities of a vehicle, is disclosed and claimed. The method includes monitoring a plurality of sensors having sensor output of vehicle motion with respect to a road surface. The method includes compensating the plurality of sensor signals by a predetermined amount, calculating the velocity by gain scheduled Kalman filtering and numerical integration, and outputting the calculated vehicle velocity to the vehicle control system.

Claims

1. A method for estimating a velocity of a vehicle, the method comprising:

monitoring a plurality of sensors having a plurality of sensor outputs indicative of vehicle motion with respect to a road surface;

compensating the plurality of sensor output signals by a predetermined amount;

calculating the velocity of the vehicle by numerical integration; and

outputting the calculated vehicle velocity to a vehicle control system.

2. The method of claim 1, wherein compensating the plurality of sensor signals further comprises determining a noise signal present in the plurality of sensor signals.

3. The method of claim 1, wherein calculating the velocity of the vehicle further comprises determining a plurality of Kalman filter gains.

4. The method of claim 1, wherein monitoring a plurality of sensors further comprises monitoring a yaw rate sensor.

5. The method of claim 1, wherein monitoring a plurality of sensors further comprises mounting a longitudinal acceleration sensor.

6. The method of claim 1, wherein monitoring a plurality of sensors further comprises monitoring a lateral acceleration sensor.

7. The method of claim 1, wherein monitoring a plurality of sensors further comprises monitoring a wheel speed sensor.

8. The method of claim 1 further comprises developing a dynamic model of the vehicle.

9. A method for estimating a velocity of a vehicle, the method comprising:

monitoring a plurality of sensors having a plurality of sensor outputs indicative of vehicle motion with respect to a road surface;

compensating the plurality of sensor output signals by a predetermined amount;

determining scheduled Kalman filter gains;

calculating the velocity of the vehicle using the determined Kalman filter gains and numerical integration; and

outputting the calculated vehicle velocity to a vehicle control system.

10. The method of claim 9, wherein compensating the plurality of sensor signals further comprises determining a noise signal present in the plurality of sensor signals.

11. The method of claim 9, wherein monitoring a plurality of sensors further comprises monitoring a yaw rate sensor.

12. The method of claim 9, wherein monitoring a plurality of sensors further comprises mounting a longitudinal acceleration sensor.

13. The method of claim 9, wherein monitoring a plurality of sensors further comprises monitoring a lateral acceleration sensor.

14. The method of claim 9, wherein monitoring a plurality of sensors further comprises monitoring a wheel speed sensor.

15. The method of claim 9 further comprises developing a dynamic model of the vehicle.