US Patent 7526382 Side collision plausibility with lateral velocity

The method and system of this invention discriminates between a lateral collision and a static non-collision event by measuring lateral velocity of the vehicle and adjusting a threshold value causing occupant restraint system actuation according to the measured lateral velocity. The threshold value is decreased in response to an increase in lateral velocity and increased or maintained at a higher value when lateral velocity is minimal to prevent actuation caused by a non-crash event such as a door slam.