Research On Full Speed Domain Control Of Adaptive Cruise System Based On ADAS Experimental Platform

Over the next few decades,cars will slowly transition from current auxiliary driving to intelligent driverless driving.At present,the advanced auxiliary driving system in the field of intelligent driving is achieved by some stage graduate students ADAS,And ACC is one of the advanced auxiliary driving systems with long development time,which can effectively reduce driver’s operating burden,reduce road traffic accident rate and improve road utilization,It can also effectively improve the comfort of the car and fuel economy.Therefore,the research on adaptive cruise control is of great significance to all universities and automobile technology companies at home and abroad.This paper,based on the ADAS experimental platform provided by the science and technology research project "High performance ADAS Experimental system Development" of Liaoning Provincial Education Department,carries on the deep simulation experiment research to the ACC system security distance algorithm,the logic switching control strategy,the upper and lower layer controller algorithm.Firstly,the development status of adaptive cruise system at home and abroad is deeply understood,and the existing ACC system control algorithm and control strategy are understood to lay a foundation for the construction of subsequent ACC system.Then the safety distance algorithm and control strategy of automobile are studied and built in detail,the existing safety distance algorithm is understood in detail,and the safety distance algorithm based on variable front time distance is selected at low speed.The vehicle braking process kinematics analysis safety distance algorithm is used at high speed.The benefits of doing so take into account both road utilization and vehicle safety.Then the system control strategy is analyzed and the system logic switching control strategy is set up.Secondly,the upper and lower layer controller of adaptive cruise system is designed and modeled.First,considering the upper layer control algorithm of the system,the traditional PI control algorithm is adopted in cruise mode.The linear quadratic optimal control algorithm can be adjusted by feedback,and the suitable PI control parameters and LQR control parameters are adjusted in the subsequent simulation work.Then the lower controller is designed,and the switching strategy between throttle opening and braking pressure is built.Thirdly,the system composition of the ADAS experimental platform and the working principle and function of the ADAS experimental platform can be introduced,and the specific parameter configuration CarSim the software used in the joint simulation is set up.Finally,the software related settings are set up in detail.Finally,the joint simulation experiment is carried out by using CarSim and Matlab/Simulink.In this paper,four different working conditions are set up to carry out the experiment,and the results are analyzed to determine the stability and feasibility of the design and construction system.And then on the ADAS experimental platform for more than two working conditions for experimental verification.The results show that the designed adaptive cruise system can meet the requirements of automobile adaptive cruise control system and can provide reference and reference for related research.