Control Module for a Vehicle System, the Vehicle System and a Vehicle Having this Vehicle System

• US 20130261875A1
• Filed: 08/17/2011
• Published: 10/03/2013
• Est. Priority Date: 11/05/2010
• Status: Abandoned Application

• Current Assignee: Wabco GmbH (Wabco Holdings Incorporated)
• Original Assignee: Wabco GmbH (Wabco Holdings Incorporated)
• Inventors: Kamischke, Waldemar
• Application Number:
  US13/883,333
• Publication Number:
  US 20130261875A1
• Time in Patent Office: Days
• US Class Current: 701/29.1
• CPC Class Codes: B60W 2040/1315 Location of the centre of gravity
• CPC Class Codes: B60W 2050/0056 Low-pass filters
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 30/02 Control of vehicle driving stability
• CPC Class Codes: B60W 40/109 Lateral acceleration
• CPC Class Codes: B60Y 2200/143 Busses
• CPC Class Codes: B60Y 2200/1432 Low floor busses
• CPC Class Codes: G01P 15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration

Abstract

A control module for a vehicle system has: a lateral acceleration sensor for measuring a lateral acceleration and outputting a lateral acceleration measurement signal, a yaw rate sensor for detecting a yaw rate and outputting a yaw rate measurement signal, and a central control device for receiving the yaw rate measurement signal and the lateral acceleration measurement signal and determining a lateral acceleration of the vehicle at its center-of-gravity. The central control device determines the center-of-gravity lateral acceleration from a sensor distance of the lateral acceleration sensor from the vehicle center-of-gravity and the yaw rate measurement signal, forming a derivative over time. The central control device filters the yaw rate measurement signal with a low-pass filter and subsequently forms a derivative over time and determines the sensor distance on an up-to-date basis.

Claims

1. A control module for a vehicle system, the control module comprising:

a lateral acceleration sensor to measure a lateral acceleration of the vehicle and output a lateral acceleration measuring signal;

a yaw rate sensor to detect a yaw rate of the vehicle and output a yaw rate measuring signal; and

a central control unit configured to record the yaw rate measuring signal and the lateral acceleration measuring signal, filter the yaw rate measuring signal using a low-pass filter, form a time derivative, substantially instantaneously determine a sensor distance of the lateral acceleration sensor from the center of gravity of the vehicle, and determine a center of gravity lateral acceleration of the vehicle in the center of gravity of the vehicle based at least in part on the

sensor distance and the filtered yaw rate measuring signal.

2. The control module as claimed in claim 1, wherein the low-pass filter is a Tschebyscheff filter.

3. The control module as claimed in claim 1, wherein the central control unit is configured to determine the sensor distance from a torque equilibrium of the center of gravity of the vehicle.

4. The control module as claimed in claim 3, wherein the central control unit is configured to determine at least one of wheel loads and axle loads of the vehicle, and the center of gravity of the vehicle based at least in part on the at least one of the wheel loads and axle loads and on wheel bases of the vehicle.

5. The control module as claimed in claim 1, wherein the central control unit is configured to determine the center of gravity of the vehicle based at least in part on weights of vehicle modules.

6. The control module as claimed in claim 5, wherein the central control unit is configured to determine the center of gravity of the vehicle based at least in part on distances of the centers of gravity of the modules to vehicle axles and mean overhangs of a front and rear module.

7. The control module as claimed in claim 1, wherein the central control unit is configured to receive at least some vehicle data for determining the center of gravity of the vehicle from at least one source of the vehicle data external to the central control unit.

8. A vehicle dynamics control system, comprising a control module as claimed in claim 1.

9. A vehicle, comprising a vehicle dynamics control system as claimed in claim 8.

14. The control module as claimed in claim 1, wherein the low-pass filter has a limiting frequency of about 7 to 10 Hz.

15. The control module as claimed in claim 1, wherein the low-pass filter has a limiting frequency of about 7.5 to 8.5 Hz.

16. The vehicle as claimed in claim 9, wherein the vehicle is a bus.

10. A method for controlling a vehicle, comprising:

measuring a yaw rate and forming a yaw rate measuring signal;

measuring a vehicle lateral acceleration outside of a center of gravity of the vehicle and forming a lateral acceleration measuring signal;

filtering the yaw rate measuring signal using a low-pass filter, and forming a time derivative of the filtered yaw rate measuring signal;

determining a sensor distance between the lateral acceleration sensor and the center of gravity of the vehicle substantially instantaneously; and

determining a center of gravity lateral acceleration based at least in part on the lateral acceleration measuring signal, the sensor distance and the filtered yaw rate measuring signal.

11. The method as claimed in claim 10, wherein the low-pass filter is a Tschebyscheff filter.

12. The method as claimed in claim 10, wherein determining the sensor distance includes determining the center of gravity of the vehicle and the distance of the center of gravity of the vehicle to a lateral acceleration sensor, and wherein determining the center of gravity from includes determining a torque equilibrium of the vehicle based at least in part on wheel bases of the vehicle and at least one of wheel loads and axle loads of the vehicle.

13. The method as claimed in claim 12, wherein the vehicle includes multiple modules, and wherein determining the center of gravity of the vehicle is based at least in part on at least one of weights and masses of the modules.

17. The method as claimed in claim 10, wherein the low-pass filter has a limiting frequency of about 7 to 10 Hz.

18. The method as claimed in claim 10, wherein the low-pass filter has a limiting frequency of about 7.5 to 8.5 Hz.