1. 研究目的与意义（文献综述）

With the rapid development of science and technology, the automotive industry is also growing rapidly. According to statistics: at the end of 2017, the number of civilian car ownership in China was 217.43 million pairs, and the death in traffic accidents reached 44790 in 2017, an increase of 3966 compared with 40824 in 2016[1].Traditional automobile headlights include near light, high beam, fog light, and the position of the lights relative to the body are fixed.Generally speaking, when driving on roads with low speed and complex surrounding environment, near-light lamps are mainly used to deal with possible emergencies.When meeting ,we should use near light to prevent lamplight to make the other side driver produces vertigo;In the case of high-speed driving on the highway, high beam is mainly used to increase the visual distance.In the case of fog,we should turn on fog lamps to obtain good lighting conditions.However, there are two kinds of problems in the actual use process :(1) the factors of the car itself, because the position of the car light is fixed relative to the body, when the car is driving on the curve, there will be a blind area, when the car load changes, the direction of the light will change in the vertical direction, affecting the lighting.(ii) human factors. The driver forgets or has no time to switch lights when meetting a car.Some drivers who are not safety conscious enough will even use one light to the end when driving on the rural roads, without switching lights from beginning to end, resulting in a high incidence of traffic accidents.In view of the problems above , it is significant to develop an adaptive headlight with multiple functions.In this way, it can not only solve the inherent problems of traditional car lights, but also avoid the influence of human factors, so as to achieve traffic safety at the greatest extent.So adaptive headlight systems were born,AFS is a safety system to achieve intelligent control of automotive headlights by electronic technology.That is: with the speed, steering wheel Angle, car body inclination, external light intensity and other factors of change, the car headlight shaft will be real-time left and right adjustments, brightness will also be adjusted to make the light more safe and reasonable.AFS mainly includes three aspects,AFS mainly includes three aspects of the content, the collection of body information-sensor; Then according to the collected information data, it is calculated and processed-the microprocessor (MCU), controls the stepping motor and automobile LED lamp according to the result of the calculation.In foreign countries, the auto adaptive headlamp technology has been quite mature.as early as in the 1980s, a foreign laboratory completed the development and testing of static AFS system, and in 1992, it became a key research project, which was called the European Community yonica 1403 project [2]. The project was strongly supported by major automobile enterprises in Europe, Japan and the United States.In the late 1990s, some foreign car companies began to put the static AFS system into production, and it quickly became a new highlight of the new generation of luxury cars.The development of the dynamic AFS system is much later than static AFS systemThe development of the dynamic AFS system is much later than that of the static AFS system.The company manetti marelli headlights in 2003 installed dynamically adjustable automobile headlights firstly.In 2006, Ford put forward the concept of turning and following headlights to make headlights without dead corners [3].At present, auto adaptive headlights are mainly based on dynamic adjustment, and the companies developing AFS system mainly include VALEO of France, DENSO of Japan and HELLA of Germany. The development of auto adaptive headlamp control technology is relatively late in China, which mainly focuses on the introduction of technology.

2. 研究的基本内容与方案

the system can achieve the following functions without affecting other functions of the car:

(1) at night, according to the steering wheel angle, vehicle speed, the headlights of the car can be rotated horizontally at a certain angle, keeping in line with the driving direction.

(2) when acceleration and deceleration result in car body pitching, the headlamp can rotate vertically at a certain angle to ensure the normal light illumination area.

3. 研究计划与安排

1-2 (week 19-20 of the 7th semester) determine the graduation project topic selection, improve the graduation project task book (relevant parameters), and collect data both on and off campus.

3 (week 1, semester 8) project conception, literature retrieval, and completion of the proposal report.

4 ~ 5 (2-3 weeks of 8th semester) foreign language translation and data collection

4. 参考文献（12篇以上）

【1】中华人民共和国2017年国民经济和社会发展统计公报[j]. 中国统计, 2018.

【2】王洪佩.汽车自适应前照灯系统研究与开发[d].淄博：山东理工大学，2011.

【3】占强. 让车灯没有死角 福特全新afs智能型主动转向头灯技术[j]. 世界汽车, 2006(4):74-75.