Patent ID: 7366598

Claim:
A device for estimating a drift amount of a lateral acceleration sensor, the device comprising: a steering torque sensor detecting a steering torque; a lateral acceleration sensor detecting a lateral acceleration; a drift amount estimating section estimating a drift amount of the lateral acceleration sensor on the basis of the steering torque, which is detected by the steering torque sensor, and the lateral acceleration, which is detected by the lateral acceleration sensor, a self-aligning torque computing section computing one of an estimated value and a detected value of self-aligning torque by using the steering torque detected by the steering torque sensor, a self-aligning torque model value computing section which computes a self-aligning torque model value on the basis of the lateral acceleration detected by the lateral acceleration sensor, wherein the drift amount estimating section estimates the drift amount of the lateral acceleration sensor on the basis of the self-aligning torque and the self-aligning torque model value which is computed by the self-aligning torque model value computing section.