Patent ID: 6631337
Filing Date: 2003-10-07
Classification: B60G,G01L,G01M

Abstract:
A process for removing a modulation sinusoidal error from signals indicative of a rotating wheel load cell measuring forces and/or moments with respect to a non-rotating orthogonal coordinate system, the process including:mounting a wheel load cell to a vehicle spindle; obtaining a first set of signals from the wheel load cell, wherein at least one signal of the first set is indicative of at least one of vehicle weight and applied moment as the vehicle travels along a smooth road surface and the load cell rotates; calculating a characterization of a modulation error from the first set of signals, the modulation error being a periodic signal having a frequency greater than a frequency of revolution of the load cell; obtaining a second set of signals from the wheel load cell pursuant to vehicle loading; calculating a modulation error in the second set of signals as a function of the characterization of the modulation error in the first set of signals; and subtracting the modulation error in the second set of signals from the second set of signals.