| 摘要 |
PROBLEM TO BE SOLVED: To optimally compensate displacement of a neutral point of an acceleration sensor to accurately detect acceleration during vehicle traveling. SOLUTION: A neutral point compensation value of a compensation value holding part 9 (a compensation value holding means) is added to detection acceleration in a vehicle traveling direction of the acceleration sensor 5 and is outputted by an adder 10 (an acceleration output means), and a wheel speed-side acceleration is calculated from a change of a detection vehicle speed of a vehicle. A correction value of the neutral point compensation value is calculated in each braking of the vehicle by a correction value calculation part (a compensation value correction means), on the basis of a difference between an estimation gradient of a gradient calculation part 12 (a gradient calculation means) based on a difference between the output acceleration of the adder 10 and the wheel speed-side acceleration, and a conversion gradient of a gradient conversion part 14 (a gradient conversion means) based on a difference between a brake-side acceleration obtained by converting a brake pressure of the vehicle and the wheel speed-side acceleration. The correction value is added to a holding value of the holding part 9, and the neutral point compensation value is rewritten to compensate the displacement of the neutral point of the sensor 5. COPYRIGHT: (C)2005,JPO&NCIPI
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