System and method for detecting vehicle motion

1. A control system for a vehicle, comprising:

a period determination module that determines a period for the vehicle to travel a predetermined distance based on a desired transmission output shaft speed (TOSS), a target transmission output shaft position, a final drive ratio of the vehicle, and a tire size of the vehicle; and

a motion detection module that detects whether the vehicle is moving based on the TOSS during the determined period.

2. The control system of claim 1 , further comprising:

a TOSS sensor that generates a TOSS signal having a plurality of pulses and a frequency based on the TOSS.

3. The control system of claim 2 , wherein the TOSS sensor includes a gear having a plurality of teeth, and wherein the target transmission output shaft position includes one of the plurality of teeth.

4. The control system of claim 2 , further comprising:

a noise filtering module that filters the TOSS signal to remove pulses having intensities less than a predetermined signal intensity threshold.

5. The control system of claim 4 , wherein the motion detection module detects whether the vehicle is moving based on the filtered TOSS signal during the determined period.

6. The control system of claim 5 , wherein the motion detection module detects that the vehicle is moving when the filtered TOSS signal includes a number of pulses during the determined period greater than a predetermined number of pulses.

7. The control system of claim 6 , wherein the motion detection module also detects whether the vehicle is moving based on at least one of vehicle speed and vehicle acceleration.

8. The control system of claim 7 , wherein the motion detection module compares the detection of whether the vehicle is moving based on the filtered TOSS signal during the period to the detection of whether the vehicle is moving based on the at least one of vehicle speed and vehicle acceleration.

9. The control system of claim 8 , wherein the motion detection module generates an error signal indicating unintended vehicle motion when the detection of whether the vehicle is moving based on the filtered TOSS signal during the period is the same as the detection of whether the vehicle is moving based on the at least one of vehicle speed and vehicle acceleration.

10. The control system of claim 8 , wherein the comparison is stored in memory for monitoring during a predetermined period.

11. A method for a vehicle, comprising:

determining, using a processor, a period for the vehicle to travel a predetermined distance based on a desired transmission output shaft speed (TOSS), a target transmission output shaft position, a final drive ratio of the vehicle, and a tire size of the vehicle; and

detecting, using the processor, whether the vehicle is moving based on the TOSS during the determined period.

12. The method of claim 11 , further comprising generating, using the processor, a TOSS signal having a plurality of pulses and a frequency based on the TOSS using a TOSS sensor.

13. The method of claim 12 , wherein the TOSS sensor includes a gear having a plurality of teeth, and wherein the target transmission output shaft position includes one of the plurality of teeth.

14. The method of claim 12 , further comprising filtering, using the processor, the TOSS signal to remove pulses having intensities less than a predetermined signal intensity threshold.

15. The method of claim 14 , further comprising detecting, using the processor, whether the vehicle is moving based on the filtered TOSS signal during the determined period.

16. The method of claim 15 , further comprising detecting, using the processor, that the vehicle is moving when the filtered TOSS signal includes a number of pulses during the determined period greater than a predetermined number of pulses.

17. The method of claim 16 , further comprising detecting, using the processor, whether the vehicle is moving based on at least one of vehicle speed and vehicle acceleration.

18. The method of claim 17 , further comprising comparing, using the processor, the detection of whether the vehicle is moving based on the filtered TOSS signal during the period to the detection of whether the vehicle is moving based on the at least one of vehicle speed and vehicle acceleration.

19. The method of claim 18 , further comprising generating, using the processor, an error signal indicating unintended vehicle motion when the detection of whether the vehicle is moving based on the filtered TOSS signal during the period is the same as the detection of whether the vehicle is moving based on the at least one of vehicle speed and vehicle acceleration.

20. The method of claim 18 , wherein the comparison is stored in memory for monitoring during a predetermined period.