System and method for initial synchronization of steering wheel and road wheels in a steer-by-wire system
First Claim
1. A method for initial synchronization of steering wheel and road wheel angles in a steer-by-wire system of a vehicle when the steer-by-wire system is powered, the method comprising:
- providing a steering wheel control system for producing the steering feel to a vehicle driver and for controlling the steering wheel to track a steering wheel reference angle;
providing a road wheel control system for generating road wheel reference angles and for controlling the road wheels to track road wheel reference angles;
sensing relative angle and absolute angle of the steering wheel, relative angle and absolute angle of the left road wheel, and relative angle and absolute angle of the right road wheel;
generating an augmented steering wheel angle based on the relative angle and the initial value of the absolute angle of the steering wheel, an augmented right road wheel angle based on the relative angle and the initial value of the absolute angle of the right road wheel, and an augmented left road wheel angle based on the relative angle and the initial value of the absolute angle of the left road wheel;
using the augmented steering wheel angle as a feedback signal to the steering wheel control system and the augmented left and right road wheel angles as feedback signals to the road wheel control system; and
controlling the steering wheel and the road wheels for performing initial synchronization of the steering wheel and the road wheels.
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Accused Products
Abstract
The present invention involves a method for initial synchronization of steering wheel and a road wheels in a steer-by-wire system of a vehicle when the system is first powered. The method includes providing a steering wheel control system and a road wheel control system. The method further includes sensing relative angles and the absolute angles of the steering wheel, road wheel, and right road wheel. The method further includes generating an augmented steering wheel angle, an augmented left road wheel angle, and an augmented right road wheel angle based on the relative angle and initial value of the absolute angles of the steering wheel and road wheels. The method further includes using the augmented steering wheel angle as a feedback signal to the steering wheel control system and the augmented left and right road wheel angles feedback signals to the road wheels control system. The method further includes controlling the steering wheel and the road wheels to perform initial synchronization of the steering wheel and the road wheels, thereby allowing the vehicle to be operable during the initial synchronization.
12 Citations
25 Claims
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1. A method for initial synchronization of steering wheel and road wheel angles in a steer-by-wire system of a vehicle when the steer-by-wire system is powered, the method comprising:
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providing a steering wheel control system for producing the steering feel to a vehicle driver and for controlling the steering wheel to track a steering wheel reference angle;
providing a road wheel control system for generating road wheel reference angles and for controlling the road wheels to track road wheel reference angles;
sensing relative angle and absolute angle of the steering wheel, relative angle and absolute angle of the left road wheel, and relative angle and absolute angle of the right road wheel;
generating an augmented steering wheel angle based on the relative angle and the initial value of the absolute angle of the steering wheel, an augmented right road wheel angle based on the relative angle and the initial value of the absolute angle of the right road wheel, and an augmented left road wheel angle based on the relative angle and the initial value of the absolute angle of the left road wheel;
using the augmented steering wheel angle as a feedback signal to the steering wheel control system and the augmented left and right road wheel angles as feedback signals to the road wheel control system; and
controlling the steering wheel and the road wheels for performing initial synchronization of the steering wheel and the road wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for initial synchronization of steering wheel and road wheel angles in a vehicle steer-by-wire system when the steer-by-wire system is first powered, the system comprising:
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a steering wheel control system for producing steering feel and controlling the steering wheel to track a steering wheel reference angle;
a road wheel control system for generating road wheel reference angles and for controlling the road wheels to track road wheel reference angles, the road wheel control system being in electrical communication with the steering wheel control system;
a sensing assembly for sensing relative angle and absolute angle of the steering wheel, relative angle and absolute angle of the left road wheel, and relative angle and absolute angle of the right road wheel; and
an augmented signal generator for generating an augmented steering wheel angle based on the relative angle and initial value of the absolute angle of the steering wheel, and an augmented right road wheel angle based on the relative angle and initial value of the absolute angle of the right road wheel, and an augmented left road wheel angle based on the relative angle and initial value of the absolute angle of the left road wheel, wherein the steering wheel control system uses the augmented steering wheel angle as the actual steering wheel feedback signal and the road wheel control system uses the augmented left and right road wheel angles as actual road wheel feedback signals, wherein the steer-by-wire system controls the steering wheel and the road wheels based on the steering wheel feedback control system and the road wheel control system to perform initial synchronization of the steering wheel and the road wheels for allowing the vehicle to be operable during the initial synchronization. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification