Information Technology Reference
In-Depth Information
- the right part of Figure 7.8 shows that the temporal speed and acceleration
curves as well as the activation levels of the active assistances (level 0: no active
assistance, level 1: regulator, level 2: emergency breaking) and informative (level 0:
no assistance, level 1: visual, level 2: visual and sound).
Speed
Acceleration
Vulnerable
User
Vehicle
Information
Zone
Active HCI
Active HMI
Lev 2
Lev 1
Lev 0
Warning Zone
Emergency
Breaking Zone
Lev 2
Informative HMI
Informative HCI
Lev 1
Figure 7.8.
Interfaces of the dynamic scenario generator for emergency breaking
Finally the “integration of the assistance” stage enables the model to function on
real data coming from the driving simulator. The outputs of perception sensors are
simulated from this data to generate a map of the environment and they translate the
type of assistance required as well as its level in terms of activation orders in the
HMI (lighting of visual interfaces, triggering of sound interfaces, activation of active
controls). All the functionalities have been integrated in an integration platform used
either in “online” mode (connected to the driving simulator), or in “offline” mode
(enabling it to replay previously recorded data).
The necessary iterative cycles (Figure 7.9) have finally been defined. The
definition cycles (D cycles) enable us to take into account the evolving
specifications that come from the refinement of the analysis of contexts and
integrate the technical constraints encountered in the development stages. The
validation cycles (V cycles) enable the developments to be validated. Three in total,
the V cycles become increasingly long as the development progresses:
- The short V1 cycle enables the coherence of the functioning of the assistance
to be identified over all use cases by using the scenario simulation tool, which
includes all the models that implement the assistance strategies. This tool therefore
enables implementation of the strategy of a given scenario after each evolution of
the module for selection of the adapted aid and testing of the repercussion on others.
- The V2 cycle, which lasts a long time, allows validation of the functioning of
assistance with the integration platform on real pre-recorded data (“offline” mode).
Initially, the integration of modules for the simulation of sensors and the module
implementing assistance strategies as well as communication between modules are
validated. Then, assistance is tested on pre-recorded data.
