Abstract
An analysis of implementation principles and algorithms of the adaptive car front-lighting system (AFS) and control methods is carried out. The AFS was adopted by the UNECE in 2007 as the rules for arranging front-lighting systems of vehicles when driving in the dark. Among the known algorithms of AFS operation, a preliminary inspection algorithm is chosen, based on the features of the driver's observation of the road in front of the vehicle, taking into account the characteristics of his vision. The requirements of the algorithm for the control system are analyzed. Control methods using Arduino controllers and computer network are considered. Given the capabilities of network technologies, the CAN network (Controller Area Network) is chosen to ensure the quality of control. It is recommended to use the CAN network option with a length of 40 or 100 m and a speed of 1,000, 500 kbit/s, respectively. Network performance parameters are calculated: speed, error probabilities, performance dependence on load, size of commands and duration of transmission, and compliance with AFS requirements. It is proposed to improve the network arbitration algorithm by increasing the probability of transmission of low-priority commands at high load. The AFS developed on the basis of the CAN network allows creating comfortable conditions for the driver in the dark, preventing accidents, and ensuring traffic safety. An analysis of the AFS operation shows that it is directly related to the operation of most of the main components of the car, namely: engine, steering, gearbox, brakes, accelerometer, etc. It is operated under the driver’s control. Therefore, this system can have extended functions, serve as the basis for the safety system and vehicle control system as a whole
Highlights
The problem of adaptive lighting arose with the advent of the automotive industry
Since the aim of the study is to ensure reliable and analysis shows that the operation of the Adaptive Front-lighting System” (AFS) requires the error-free operation, it is necessary to focus on the known coordinated operation of a number of vehicle mechanisms: AFS algorithms and the possibility of their implementation steering wheel, engine, accelerator, turn signals, etc
The analysis shows that the AFS system contains most of the elements that ensure vehicle safety, it can serve as a basis for building an automatic vehicle safety system
Summary
The problem of adaptive lighting arose with the advent of the automotive industry. The driver of the vehicle must see the road. If the vehicle turns from the main road, the direction of the headlamps does not coincide with the direction of the side road and does not illuminate it. The driver has to drive in the dark. Obstacles or pedestrians may cause an accident. Cars were equipped with swiveling headlamps, which can be turned, as a rule, manually. When driving fast on a winding road, the driver is unable to control the position of the headlamps and has to reduce speed, but this does not help much. There are still unlit areas of the road
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