Road wheel disturbance detection

1. An alert system for a vehicle, comprising:

a first module configured to:

estimate a magnitude of a wheel disturbance based on a wheel velocity; and

reduce the magnitude of the wheel disturbance based on an effect of any non-wheel disturbance; and

a second module configured to:

generate a disturbance status based on the magnitude of the wheel disturbance; and

provide an alert to a driver of the vehicle based on the disturbance status.

2. The system of claim 1 , wherein the first module is configured to estimate the magnitude of the wheel disturbance based on a variation in a wheel signal that indicates the wheel velocity.

3. The system of claim 2 , wherein the first module is further configured to quantify the variation.

4. The system of claim 2 further comprising a third module configured to estimate a frequency of the wheel signal, wherein the first module is configured to estimate the magnitude of the wheel disturbance further based on the frequency.

5. The system of claim 4 , wherein the first module is configured to estimate the magnitude of the wheel disturbance when the frequency is within a range.

6. The system of claim 4 further comprising a fourth module configured to process the wheel signal based on a filter.

7. The system of claim 6 , wherein the filter is a bandpass filter.

8. An alert method for a vehicle, comprising:

estimating a disturbance frequency based on a wheel velocity;

processing the wheel velocity using the estimated disturbance frequency;

estimating a magnitude of a wheel disturbance based on-a the processed wheel velocity;

generating a disturbance status signal based on the magnitude of the wheel disturbance; and

providing an alert to a driver of the vehicle based on the disturbance status signal.

9. The control method of claim 8 , wherein the estimating the magnitude of the wheel disturbance is based on a variation in a wheel signal that indicates the wheel velocity.

10. The control method of claim 9 , further comprising quantifying the variation.

11. The method of claim 8 , wherein the estimating the magnitude of the wheel disturbance is further based on the disturbance frequency.

12. The method of claim 8 , wherein the estimating the magnitude of the wheel disturbance occurs when the disturbance frequency is within a range.

13. The method of claim 9 further comprising processing the wheel signal based on a filter.

14. The method of claim 13 , wherein the filter is a bandpass filter.

15. A system for determining road wheel disturbance in a vehicle, comprising:

at least one wheel sensor that generates at least one wheel signal; and

a control module configured to:

receive the wheel signal;

estimate a magnitude of the wheel disturbance based on the wheel signal;

reduce the magnitude of the wheel disturbance based on an effect of any non-wheel disturbance;

generate a disturbance status based on the magnitude of wheel disturbance; and

provide an alert to a driver of the vehicle based on the disturbance status.

16. The system of claim 15 , wherein the control module is configured to estimate the magnitude of wheel disturbance based on a variation in the wheel signal that indicates a wheel velocity.

17. The system of claim 16 , wherein the control module is further configured to quantify the variation.

18. The system of claim 15 , wherein the control module is further configured to:

estimate a frequency of the wheel signal; and

estimate the magnitude of the wheel disturbance further based on the frequency.

19. The system of claim 18 , wherein the control module is configured to estimate the magnitude of the wheel disturbance when the frequency is within a range.

20. The system of claim 15 , wherein the control module processes the wheel signal based on a filter.