Research On Simulation Experimental Platform Of Automobile Adaptive Front-Light System

Currently, Illuminance places a very important role in a secured night driving. Therefore, countries all over the world have concentrated so much money and efforts on the research in this regard over the years. Adaptive Front-light System (AFS), due to its autonomous adjustment of lighting swiveling angles, illuminance and colors according to various surroundings of driving, is now attracting eyeballs of the people all over the world. By referring to a high-tech project created in a enterprise and drawing upon the domestic and international endeavors in this regard, a experimental platform is created to simulate and test operating laws changed according to the surroundings, and therefore to provide a theoritical foundation for the further research and decreasing a large cost for the company in this regard.Based on the foundmental requirement of AFS, a simulation experimental platform, created in software environment of CATIA and then manufactured by Wuhan Donglong Electronic Company, can be operated and controlled with acquisitions of such three signals as swiveling angles, velocity and inclination changing volume, so that the horizonal and vertical swiveling adjustment can be achieved. Beyond that, a data acquisition system with functions of data collecting and platform controlling, and a human-machine interface with data display, saving and reviewing based on Labview are also created.In terms of the vertical process, the simulation experimental platform can be simplified as a suspension model with four freedom degrees(FFD). By referring to mathematical models in this regard and considering huge impact caused by the roadmap, a mathematical model with interference of white noise is created firstly. Then, by adopting the fuzzy control strategy that the changing volume of vertical acceleration can lead to the change of damping, the vehicles pitch and its instrutions that leads to the changing of swiveling angle are also adjusted with ideal margins. Thanks to the important endeavors made stated above, a simulation model constructed in Matlab can achieve our goal of four freedom degrees simulation. Finally, by programing and debuging with the help of Genetic Algorithm toolbox, control laws in fuzzy control system and corresponding parameters are optimized, and therefore the vertical acceleration, platforms pitch as well as the instructions to swiveling volume of the lamp can be achieved with an ideal moving margin.The simulating result illustrates the reliability of the choosen model and effectiveness of the membership function. Despite great disparities still exist between the simulation experimental platform and a real suspension, conclusions such as the effectiveness of the apparently decreasing vertical acceleration demonstrates that this platform will play a critical role in our future research in this regard.