Patent ID: 6560553
Filing Date: 2003-05-06
Classification: G01P

Abstract:
A method of estimating an eccentric position of an acceleration sensor, in a double turntable-type acceleration generating apparatus including a main rotating body rotated by a first servo motor; and an auxiliary rotating body mounted on an outer periphery of the main rotating body, the auxiliary rotating body being rotatable by a second servo motor, on which the acceleration sensor is capable of being mounted,said method comprising the steps of: (a) mounting the acceleration sensor on the auxiliary rotating body; (b) rotating the auxiliary rotating body at a constant frequency with the main rotating body held at a standstill; (c) measuring an output signal from the acceleration sensor during the step (b); (d) determining an amount of eccentricity in an X-axis direction of the acceleration sensor from the frequency of the auxiliary rotating body and the output signal during the step (b); and (e) determining an amount of eccentricity in a Y-axis direction by using tangential acceleration generated by the rotation of the auxiliary rotating body in a state in which the amount of eccentricity in the X-direction is set to substantially zero.