Process for reducing bias error in a vibrating structure sensor

摘要

Bias error is reduced in a vibrating structure sensor having primary and secondary pick-off means (2, 3, Fig.2) separated by a fixed angular amount (45�) with respect to the vibrating structure by summing a proportion of the primary pick-off means output signal 10 into the secondary pick-off means output signal 15 or subtracting a proportion of the primary pick-off means output signal 10 from the secondary pick-off means output signal 15 effectively to reduce or increase the angular separation of the secondary pick-off means (3) from the primary drive means (1) by an amount sufficient to set the rate output signal from the vibrating structure to zero and thereby minimise bias error.