System for controlling a vehicle relative to a judged shape of a

Details System for controlling a vehicle relative to a judged shape of a System for controlling a vehicle relative to a judged shape of a

1995-02-22

1997-08-26

Zanelli, Michael

Boots, shoes, and leggings

364424051, 3644491, 340995, 340438, G06F 1900, G01C 2120

Patent

active

056616503

ABSTRACT:
A vehicle position is determined and four reference coordinate points N.sub.1, N.sub.2, N.sub.3 and N.sub.4 are extracted at predetermined distances on a road output from a CD-ROM or an IC card, and an angle .theta. of turning of the vehicle from the coordinate point N.sub.2 to the coordinate point N.sub.3 is calculated according to an expression, .theta.=(.theta..sub.1 +.theta..sub.2) from an angle .theta..sub.1 formed by a vector V.sub.12 between the points N.sub.1, N.sub.2 and a vector V.sub.23 between the points N.sub.2, N.sub.3 and an angle .theta..sub.2 formed by the vector V.sub.23 between the points N.sub.2, N.sub.3 and a vector V.sub.34 between the points N.sub.3, N.sub.4. A steering angle permitting the vehicle to safely pass through a curve is calculated based on the turning angle .theta. and a vehicle speed V.sub.0, and a passable vehicle speed permitting the vehicle to safely pass through the curve is calculated based on a radius R=a/.theta. of curvature of the curve. Thus, the servicing of a conventional infrastructure requiring increased equipment and maintenance costs is not required, and it is possible to carry out a vehicle control based on a minimum amount of data storable in a CD-ROM or an IC card.

REFERENCES:
patent: 5046011 (1991-09-01), Kakihara et al.
patent: 5146219 (1992-09-01), Zechnall
patent: 5163002 (1992-11-01), Kurami
patent: 5315295 (1994-05-01), Fujii
patent: 5414625 (1995-05-01), Hattori
patent: 5485381 (1996-01-01), Heintz et al.
patent: 5539397 (1996-07-01), Asanuma et al.
patent: 5546311 (1996-08-01), Sekine

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