US 12,601,657 B2 · System and method for identifying a tire contact length from radial acceleration signals

Abstract

Systems and methods are disclosed herein for estimating at least one force acting upon a vehicle-mounted tire. An acceleration waveform (150) of the tire is detected in a tire radial direction from sampled outputs of a tire-mounted acceleration sensor (118). The acceleration waveform is integrated in the tire radial direction to generate a velocity waveform (step 220). A number of samples during ground contact are calculated from at least first and second peaks in the velocity waveform, wherein a ground contact length is calculated based on at least the calculated number of samples during ground contact, a sampling rate of the outputs of the tire-mounted acceleration sensor, and a velocity of the vehicle. At least one force acting on the tire is estimated from at least the calculated ground contact length (166), and an output signal is generated corresponding to the estimated at least one force acting on the tire.

Claims20

Dependent claims

A computer-implemented method for estimating at least one force acting upon at least one tire mounted on a vehicle, the method comprising:

a) detecting an acceleration waveform of a tire in a tire radial direction from sampled outputs of a tire-mounted acceleration sensor;
b) integrating the acceleration waveform in the tire radial direction to generate a velocity waveform;
c) calculating a number of samples during ground contact from at least first and second peaks in the velocity waveform;
d) calculating a ground contact length based on at least the calculated number of samples during ground contact, a sampling rate of the outputs of the tire-mounted acceleration sensor, and a velocity of the vehicle;
e) estimating at least one force acting on the tire from the calculated ground contact length;
and
f) generating an output signal corresponding to the estimated at least one force acting on the tire.

4 more elements

A system for estimating at least one force acting on at least one tire mounted on a vehicle, the system comprising:

a tire-mounted acceleration sensor configured to generate output signals corresponding to sampled acceleration of a tire in a tire radial direction;
and
a controller linked for communication with the tire-mounted acceleration sensor and further configured to direct the performance of operations comprising:
detect an acceleration waveform of the tire in the tire radial direction from sampled outputs of the tire-mounted acceleration sensor;
integrating the acceleration waveform in the tire radial direction to generate a velocity waveform;
calculate a number of samples during ground contact from at least first and second peaks in the velocity waveform;
calculate a ground contact length based on at least the calculated number of samples during ground contact, a sampling rate of the outputs of the tire-mounted acceleration sensor, and a velocity of the vehicle;
estimate at least one force acting on the tire from the calculated ground contact length;
and
generate an output signal corresponding to the estimated at least one force acting on the tire.

7 more elements

Dependencies are inferred from the claim text.

System and method for identifying a tire contact length from radial acceleration signals

Life of this patent

System and method for identifying a tire contact length from radial acceleration signals

Life of this patent

Abstract

Claims20