Information Technology Reference
In-Depth Information
according to the states of the driver and the technologists can work on the algorithms
allowing their identification. Any change in technology on the vehicle (for example
a change of the gearbox type) will only affect this second aspect.
7.5.2.3.
Decision tables
The spatial partition defined around the vehicle in terms of detection zones and
the characterization of the activity of the driver defined in 10 states enables a finite
number of possible input states to be obtained. Two decision tables (one for
informative functioning and the other for active functioning) with two dimensions
(activity and decision zone) show the level of assistance provided for each
combination: no assistance (NoAss), non intrusive information (INF), a warning
(WNG) or active assistance (emergency braking-BKG-start inhibit-SIN-).
These tables also enable the evolution of situations to be apprehended by taking
into account the evolution of the maneuver resulting from the behavior of the driver
(decision to start, starting, move forward) and the evolution of the movement of a
vulnerable user.
Table 7.2.
Extract from a decision table
For example, in the presence of a vulnerable user in the near front zone (Table
7.2, line 1), the information delivered evolves from an absence of assistance if the
intention model is in the “selection” state, to an unobtrusive informative assistance
(solely visual if the intention model is in the “Starting” state), then to a stronger
informative assistance (visual and sound) if the intention model is in the “moving
forward” state. The intensity of alarms therefore intensifies as the maneuver
progresses. However, if the intention model remains in the same state, for example
the “Starting turn right going forward” (Table 7.2, column 7), and a vulnerable user
appears in the near right zone (Table 7.2, line 2, column 2), the visual information as
