Page - 9 - in Integration of Advanced Driver Assistance Systems on Full-Vehicle Level - Parametrization of an Adaptive Cruise Control System Based on Test Drives

2 Adaptive Cruise Control The Traffic System describes the interactions between the vehicle, driver and environ- ment. Figure 2.1 illustrates the signal flow between the components involved, focusing on Advanced Driver Assistance System (ADAS). The driver applies his/her longitudinal (gas and brake) and lateral (steering) inputs to the vehicle. Additional inputs for the vehicle include traffic and disturbances from the environment. As described by Donges in [Don99], the human operation can be divided into three different levels that accom- plish the transport task: navigation, course guidance and stabilization. Each of these three levels has a corresponding area of human behaviours. Human behaviour consists of knowledge-based, rules-based and skill-based behaviour. According to [Don99], these behaviours cannot be directly connected to one human operation. The output of navigation is the selection of the right route to accomplish the transport task (e.g. select the motorway to reach the desired destination). The desired trajectory is selected by the course guidance (e.g. drive at 120km/h and change the lane to overtake a truck). The stabilization of the vehicle is an automatic response to stimuli (e.g. stabilization of the vehicle while over-steering through steering input). All of these three levels are based on the human perception of the environment and the vehicle. The information transfer from the vehicle to the driver happens through haptic perception (through the seat and the steering wheel) and optic and acoustic signals via the Human- Machine Interface (HMI). TheADAScontrollerreceivessignals fromthevehicledynamicsensors, theenvironmental- recognition sensors, the HMI and the ADAS actuators. Based on this information, the ADAS controller operates the actuators to control the movement of the vehicle. Some of the environmental sensors need information about the current driving state, which is sent via the ADAS controller.