Autonomous cruise controls ( ACC ; also called adaptive browsing controls , radar shipping control , traffic conscious cruise control or dynamic cruise cruise control ) is an optional cruise control system for vehicles that automatically adjust vehicle speed to keep a safe distance from the vehicle in front.
Controls are based on sensor information from on-board sensors . (No system uses satellite or roadside infrastructure or cooperative support from other vehicles.) Cooperative Adaptive Cruise Control (CACC) further extends navigation automation using information gathered from fixed infrastructure such as satellite and roadside beacons, or mobile infrastructure such as reflectors or transmitters behind other vehicles.
Such systems may use radar or laser sensors or stereo camera settings that allow the vehicle to brake when it detects a car near another vehicle in the front, then accelerate when traffic allows it.
ACC technology is widely regarded as a key component of every future generation of smart cars. They affect driver safety and comfort as well as increase road capacity by maintaining optimal separation between vehicles and reducing driver error. Vehicles with autonomous cruise control are regarded as autonomous cars Level 1, as defined by SAE International.
Adaptive cruise Control does not provide full autonomy: the system only provides assistance to the driver, but does not move the car by itself.
Europe is the main market for Cruise Adaptative control, by 2016.
Video Autonomous cruise control system
Jenis
Laser-based systems do not detect and track vehicles in bad weather conditions and also can not track dirty vehicles (and hence are not reflective). Laser-based sensors must be exposed, sensors (large enough black boxes) usually found beneath the grille, balanced to one side.
Radar-based sensors can be hidden behind plastic fascia; However, the fascias may look different from vehicles without those features. For example, Mercedes-Benz packs the radar behind the top grille in the middle and behind a solid plastic panel that has a painted blade to simulate the remaining view of the grille.
A single radar system is the most common. Systems involving multiple sensors use two similar hardware sensors such as the 2010 Audi A8 or Volkswagen Touareg, or a central long-range radar coupled with two short radar sensors placed in the corner of the vehicle such as BMW 5 and 6 series.
More recent developments are computer vision vision systems, such as those introduced to the US market in the 2013 model year by Subaru. The system has a front-facing video camera mounted on both sides of the rearview mirror and uses digital processing to extract in-depth information from parallax between the two camera views.
Help system
Radar-based ACCs often feature precrash systems, which alert the driver and/or provide brake support if there is a high risk of collision. Also in certain cars it is incorporated with a line maintenance system that provides power steering assistance to reduce the steering input load in the corners when the cruise control system is activated.
Multi-sensor system
Systems with multiple sensors can practice fusion sensors to integrate data from to improve safety and/or driving experience. GPS data can inform system geographic features such as offramp freeway. The camera system can pay attention to driver behavior such as brake lights and/or lights sein. This may allow the following car to interpret the turn signal by exit because it does not require the following car to slow down, because the main car will come out. The multi-sensor system can also watch for traffic signs/signals and not, for example, breaking a red light while following a vehicle that passes before the signal changes.
Predictive system
The three main categories of ACC are:
- Vehicles with Full Speed ​​Range 0MPH can take the car to a full stop point of up to 0 mph and need to be reactivated to keep moving with something like a paddling gas pad.
- Vehicles with Traffic Jam Assist/Stop & amp; Go resume automatically from stop to creep with stop and go traffic.
- Vehicles with partial partial Control cut & amp; die below the specified minimum speed, requiring driver intervention.
- Vehicles with full automatic speed control can respond to traffic signals and non-vehicle road activity.
Maps Autonomous cruise control system
Economy
The two Adaptative Cruise Control providers are Continental AG (Germany) and Robert Bosch (Germany).
See also
- Autonomous car
- Cooperative Adaptive Cruise Control
- Smart cars
- IEEE Intelligent Transportation System Group
- Departure departure warning system
- Precrash System
References
External links
- Cooperative Adaptive Cruise Control: Human Factor Analysis - Federal Highway Administration
Source of the article : Wikipedia
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