Determining vehicle to which control is to be related

Adaptive Cruise Control Audi

Introduction
In real traffic situations (e.g. on motorways
and multi-lane roads or when cornering),
there are generally several vehicles within the
radar detection range at the same time.
In this case it is essential to detect which
vehicle is travelling in the same lane (or from
which vehicle the selected distance is to be
maintained).
This requires lane determination by the distance
control unit. Such a process is relatively
complex and demands extra information
(additional input signals).
Of primary importance are the signals of the
turn angle sensor, wheel speed sensors and
steering angle sender. Evaluation of these
signals provides information on bends in the
road.

 

B = Average lane width
R = Cornering radius

This "fictitious" lane is derived from the current
cornering radius of the adaptive cruise
control vehicle and a specified average lane
width.

The closest object located in this lane picked
up by the radar sensor is then taken as the
relevant object for control purposes.