Active shimmy mitigation
First Claim
1. A method of reducing shimmy of a wheel of a vehicle, the wheel including a wheel brake and being rotatable about a central axis, steerable by varying a steering angle of the wheel about a steering axis that is arranged orthogonal to the central axis, and having either a positive or a negative scrub radius, the method comprising:
- detecting an oscillation/shimmy of the steering angle of the wheel about the steering axis in a first direction; and
selectively applying a braking load with the wheel brake to decelerate rotation of the wheel about the central axis, and due to the wheel having the scrub radius, bias the wheel about the steering axis in a second direction opposite to the first direction to counteract the oscillation/shimmy of the steering angle of the wheel about the steering axis;
wherein selectively applying the braking load includes;
outputting a first signal to selectively apply a first braking load,detecting whether the first braking load increases an amplitude of the oscillation/shimmy of the steering angle, andoutputting a second signal to selectively apply a second braking load to counteract the increased amplitude of the oscillation/shimmy, the corrective signal being different from the initial signal.
8 Assignments
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Accused Products
Abstract
A system mitigates shimmy of a wheel of a vehicle. The wheel is rotatable about an axis and is steerable by varying a steering angle of the wheel about a steering axis. The system includes a shimmy detection device that detects whether an oscillation/shimmy of the steering angle of the wheel occurs. The system also includes a brake that applies a braking load to decelerate rotation of the wheel about the axis. Furthermore, the system includes a controller that controls the brake to selectively apply the braking load to reduce the oscillation/shimmy of the steering angle of the wheel.
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Citations
9 Claims
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1. A method of reducing shimmy of a wheel of a vehicle, the wheel including a wheel brake and being rotatable about a central axis, steerable by varying a steering angle of the wheel about a steering axis that is arranged orthogonal to the central axis, and having either a positive or a negative scrub radius, the method comprising:
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detecting an oscillation/shimmy of the steering angle of the wheel about the steering axis in a first direction; and selectively applying a braking load with the wheel brake to decelerate rotation of the wheel about the central axis, and due to the wheel having the scrub radius, bias the wheel about the steering axis in a second direction opposite to the first direction to counteract the oscillation/shimmy of the steering angle of the wheel about the steering axis; wherein selectively applying the braking load includes; outputting a first signal to selectively apply a first braking load, detecting whether the first braking load increases an amplitude of the oscillation/shimmy of the steering angle, and outputting a second signal to selectively apply a second braking load to counteract the increased amplitude of the oscillation/shimmy, the corrective signal being different from the initial signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification