Test On Warning Information Of Driver’s Reaction Characteristic And Application In Lane Departure Warning System

Lane Departure Warning (LDW) system is a kind of driving safety assistance system for vehicle. The system is designed to help the driver avoid or reduce accidents about lane departure. It determines whether there is a trend that the car is going to deviate from the lane by the parameter of information about the road which is got from sensor, vehicle status and warning time. If a deviation of the car is about to happen and the driver doesn’t turn on the turn signal, the system will alert the driver by visual, auditory or tactile manner.Based on the driver Optimal Preview Acceleration Model, Automotive Simulation and Control of Jilin University State key laboratory has been committed to the exploration and research on the Lane Departure Warning system. And some results on the simulation level about human-vehicle-road closed-loop have been achieved.The work carried out in this paper includes the following aspects:The measurement of the driver’s reaction time is implemented for different types of driver and ways of warning on the real vehicle test platform. Better warning mode will be selected by comparing, and the parameter about reaction time of different types of driver will also be acquired by analyzing the experimental data. Meanwhile, based on the algorithm on Lane Departure Warning system proposed by the research group before, a steady-state value of lateral acceleration that correspond to a certain velocity and steering wheel angle is going to be used. The change will make the algorithm predict the vehicle trajectory closer to the real situation, and let the warning information be more acceptable to the driver. Then, the simulation contrast of the algorithm changed before and after and the traditional TLC algorithm should be taken, and the warning effect of the three algorithms should also be compared. Finally, the entire system is going to be transplanted to the driver-in-loop test platform and the real vehicle test platform, and the parameter about reaction time of different types of driver should be made use of. The effectiveness of the Lane Departure Warning system will be proved by the experimental validation of the simulator and the performance demonstration of the real vehicle platform by some simple experimental conditions, and the parameter about reaction time of different types of driver will be selected by comparison.Sections of this paper are organized as follows:Chapter one mainly consists of two parts. The first part introduces the research status of the reaction characteristic, and the second part is the introduction about lane departure warning system development and its algorithm. Different types of measurement methods of reaction time of two groups of people which are ordinary people and drivers are enumerated in the part one. Summarize these methods as the theoretical basis of our own methods of measurement. The history and development of the lane departure warning system is sketched and the research status of the algorithm is focused on in part two. Thus pave the way for the work of algorithm improvement.Chapter two, in the real vehicle test platform for driver reaction characteristic, by the use of Lab VIEW software and PXI industrial machine, the measurement button of driver’s reaction time, and the combination of warning mode of warning information release ARM board and speaker, the measurement of the driver’s reaction time is implemented for different types of driver and ways of warning on the real vehicle test platform. Better warning mode will be selected by comparing, and the parameter about reaction time of different types of driver will also be acquired by analyzing the experimental data.Chapter three, based on the algorithm on Lane Departure Warning system proposed by the research group before, a steady-state value of lateral acceleration that correspond to a certain velocity and steering wheel angle is going to be used. The change will make the algorithm predict the vehicle trajectory closer to the real situation, and let the warning information be more acceptable to the driver. Then, the simulation contrast of the algorithm changed before and after and the traditional TLC algorithm should be taken, and the warning effect of the three algorithms should also be compared.Chapter four, the entire system is going to be transplanted to the driver-in-loop test platform and the real vehicle test platform, and the parameter about reaction time of different types of driver should be made use of. The effectiveness of the Lane Departure Warning system will be proved by the experimental validation of the simulator and the performance demonstration of the real vehicle platform by some simple experimental conditions, and the parameter about reaction time of different types of driver will be selected by comparison.Chapter five, summary the paper and propose the deficiency and problem to be solved.