Process for calculating estimated vehicle speeds

Details Process for calculating estimated vehicle speeds Process for calculating estimated vehicle speeds

1995-01-26

1996-10-15

Zanelli, Michael

Boots, shoes, and leggings

36442602, 36442603, 36457102, G06F 1900, G01P 300

Patent

active

055660940

ABSTRACT:
A process for calculating estimated vehicle speeds on the basis of wheel speeds of the vehicle wheels and a value resulting from addition of an offset value corresponding to an output error including a dispersion component and a slope component of an output from a longitudinal acceleration/deceleration sensor to a detection value detected by the longitudinal acceleration/deceleration sensor. In a condition in which it is determined that a vehicle is traveling at a substantially constant speed for a relatively long period of time, a first correction amount is calculated from an average value of variations in wheel speeds and an average value of outputs from the longitudinal acceleration/deceleration sensor during the long period of time. In a condition in which it is determined that the vehicle is traveling at a substantially constant speed for a relatively short period of time, a second correction amount is calculated from the average value of variations in wheel speeds and the average values of outputs from the longitudinal acceleration/deceleration sensor during the short period of time. An amount of correction of the zero point of the longitudinal acceleration/deceleration sensor is determined by the first correction amount, and the correction of the offset value is determined by the second correction amount.

REFERENCES:
patent: 4974163 (1990-11-01), Yasuno et al.
patent: 5200896 (1993-04-01), Sato et al.
patent: 5307274 (1994-04-01), Takata et al.
patent: 5483452 (1996-01-01), Tanaka

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