METHOD FOR DETERMINING A TILT ANGLE OF A VEHICLE
First Claim
1. A method for determining a tilt angle of a vehicle, the method comprising:
- providing acceleration measurement values by measuring accelerations of the vehicle in directions along an X-axis, a Y-axis, and a Z-axis, the X-axis, the Y-axis, and the Z-axis being substantially perpendicular with respect to one another;
calculating a current tilt angle of the vehicle as a function of the acceleration measurement values;
calculating a magnitude of a vector sum of the accelerations of the vehicle in the directions along the X-axis, the Y-axis, and the Z-axis; and
calculating a compensated tilt angle as a function of the current tilt angle, which is calculated from the acceleration measurement values, of at least one preceding tilt angle, and of the magnitude of the vector sum of the accelerations in the directions along the X-axis, the Y-axis, and the Z-axis such that the at least one preceding tilt angle is used for calculating the compensated tilt angle if the magnitude of the vector sum of the accelerations in the directions along the X-axis, the Y-axis, and the Z-axis is substantially different from a magnitude of a gravitational acceleration.
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Abstract
A method for determining a tilt angle of a vehicle includes measuring accelerations of a vehicle in directions along a longitudinal axis, a transverse axis, and a vertical axis of the vehicle. A current tilt angle of the vehicle is calculated as a function of the measured accelerations. A magnitude-compensated tilt angle is calculated as a function of the current tilt angle, of a preceding tilt angle, and of the magnitude of the vector sum of the measured accelerations. A gyroscopically stabilized magnitude-compensated tilt angle is calculated as a function of the current tilt angle, of a preceding tilt angle, of the magnitude of the vector sum of the measured accelerations, and of a change in the tilt angle over a given time period calculated from angular rate data provided by a gyroscope.
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Citations
10 Claims
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1. A method for determining a tilt angle of a vehicle, the method comprising:
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providing acceleration measurement values by measuring accelerations of the vehicle in directions along an X-axis, a Y-axis, and a Z-axis, the X-axis, the Y-axis, and the Z-axis being substantially perpendicular with respect to one another; calculating a current tilt angle of the vehicle as a function of the acceleration measurement values; calculating a magnitude of a vector sum of the accelerations of the vehicle in the directions along the X-axis, the Y-axis, and the Z-axis; and calculating a compensated tilt angle as a function of the current tilt angle, which is calculated from the acceleration measurement values, of at least one preceding tilt angle, and of the magnitude of the vector sum of the accelerations in the directions along the X-axis, the Y-axis, and the Z-axis such that the at least one preceding tilt angle is used for calculating the compensated tilt angle if the magnitude of the vector sum of the accelerations in the directions along the X-axis, the Y-axis, and the Z-axis is substantially different from a magnitude of a gravitational acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification