System and method for determining a steering angle for a vehicle and system and method for controlling a vehicle based on same
First Claim
1. A system for determining an angular position of a steerable wheel of a vehicle having a plurality of wheels comprising:
- a relative position steering angle sensor configured to output data indicative of a change in position of the steerable wheel;
a yaw rate sensor configured to output data indicative of an angular velocity of the vehicle about a vertical axis of the vehicle;
a lateral acceleration sensor configured to output data indicative of an acceleration of the vehicle in a substantially transverse direction of the vehicle;
a plurality of wheel speed sensors, wherein each wheel speed sensor is configured to output data indicative of a rotational velocity of a respective one of the plurality of wheels; and
a controller in electrical communication with each of the plurality of wheel speed sensors, the lateral acceleration sensor, and the yaw rate sensor, and the controller is configured todetermine a minimum wheel speed by comparing the data from each of the plurality of wheel speed sensors,compare a first data set and a second data set to respective straight path conditions, wherein the first data set includes data from the yaw rate sensor, data from the lateral acceleration sensor, and the minimum wheel speed, and the second data set includes data from the plurality of wheel speed sensors,determine a substantially straight path of travel condition when the comparison of at least one of the first data set and the second data set satisfies the respective straight path conditions, andassociate data acquired from the steering angle sensor with a neutral position when the controller determines the substantially straight path of travel condition.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for determining an angular position of a steerable wheel of a vehicle can include a plurality of sensors and a controller in electrical communication with each of these sensors. The controller can be configured to compare a first data set and a second data set to respective straight path conditions, wherein the first data set includes data from a first set of the sensors and the second data includes data from a second set of the sensors. The controller can be configured to determine a substantially straight path of travel condition when the comparison of at least one of the first data set and the second data set satisfies the respective straight path conditions, and can then associate that data acquired from the steering angle sensor(s) with a neutral position.
76 Citations
30 Claims
-
1. A system for determining an angular position of a steerable wheel of a vehicle having a plurality of wheels comprising:
-
a relative position steering angle sensor configured to output data indicative of a change in position of the steerable wheel; a yaw rate sensor configured to output data indicative of an angular velocity of the vehicle about a vertical axis of the vehicle; a lateral acceleration sensor configured to output data indicative of an acceleration of the vehicle in a substantially transverse direction of the vehicle; a plurality of wheel speed sensors, wherein each wheel speed sensor is configured to output data indicative of a rotational velocity of a respective one of the plurality of wheels; and a controller in electrical communication with each of the plurality of wheel speed sensors, the lateral acceleration sensor, and the yaw rate sensor, and the controller is configured to determine a minimum wheel speed by comparing the data from each of the plurality of wheel speed sensors, compare a first data set and a second data set to respective straight path conditions, wherein the first data set includes data from the yaw rate sensor, data from the lateral acceleration sensor, and the minimum wheel speed, and the second data set includes data from the plurality of wheel speed sensors, determine a substantially straight path of travel condition when the comparison of at least one of the first data set and the second data set satisfies the respective straight path conditions, and associate data acquired from the steering angle sensor with a neutral position when the controller determines the substantially straight path of travel condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 25, 26, 27, 28, 29, 30)
-
-
17. A method for determining a steering angle of a steerable wheel of a vehicle having a plurality of wheels comprising:
-
comparing a first data set and a second data set to respective straight path conditions, wherein the first data set includes data from a yaw rate sensor, data from a lateral acceleration sensor, and at least one slip ratio derived from the data from the plurality of wheel speed sensors, the at least one slip ratio indicates the percent difference between speeds of a respective pair of the plurality of wheels, and the second data set includes data from a plurality of wheel speed sensors; determining a substantially straight path of travel condition when the comparison of at least one of the first data set and the second data set satisfies the respective straight path conditions; and associating data acquired from a steering angle sensor with a neutral position when the controller determines the substantially straight path of travel condition. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification