Speed sensor filter

Details Speed sensor filter Speed sensor filter

F - Mech Eng,Light,Heat,Weapons

16

H

F16H 61/02 (2006.01) F16H 59/36 (2006.01) F16H 61/48 (2006.01) G01P 3/44 (2006.01) G01P 15/16 (2006.01)

Patent

CA 2150589

A filter for removing oscillations and transients from vehicle driveline component angular velocity measurement signals. The filter determines, from successive measurements of angular velocity, any angular acceleration of a driveline component. Predetermined sets of unity and fractional multipliers are assigned to respective ranges of angular acceleration. Each succeeding measurement of angular velocity is estimated by adding the product of a selected modifier value and the difference between the currently sensed and the previously estimated values of angular velocity to the previously estimated value of angular velocity. Multipliers are valued and selected so that, when angular accelerations are detected, relatively large percentages of the differences between currently sensed and previously estimated values of angular velocity are added a relatively small number of times to previously estimated values of angular velocity when the differences are relatively small. Conversely, relatively small percentages of the differences between currently sensed and previously estimated values of angular velocity are added a relatively large number of times to previously estimated values of angular velocity when the differences are relatively large.

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