Research On Real-time Simulation Technology Of Vehicle Dynamics Based On Driving Simulator Platform

With the development of computer technology, real-time simulation technology of vehicle dynamics has been more and more used in the development of new models, road alignment planning,driving training and other fields,so the research and development of the real-time simulation technology of vehicle dynamics is paid more and more attention by enterprises and institutions. Combined with the project needs, this paper researches on the real time data acquisition technology and vehicle dynamics simulation technology based on vehicle driving simulator, and develops vehicle dynamics simulation system based on Visual Studio 2010. The main work of this paper includes the following aspects:Research on real time data acquisition and transmission mode of driver’s operation data, and do further processing of the collected data. The function relationship between mechanical displacement and electric quantity is determined by the calibration of the sensor of the test bench. Determine the functional relationship between the amount of mechanical displacement and electric quantity by calibrating the sensor of the test bench, and design PC interface program based on serial communication technology to realize real-time receiving of the operator’s operation data by the host computer. Establish calculation model for each module which is related to the driver’s input, and the load characteristics of diesel engine according to the characteristics of the medium duty truck, output torque of transmission system, braking torque of barometric pressure drum type brake and calculation model of front wheel steering angle, and then design the algorithm flow of design procedure.Research on dynamic simulation technology of vehicle dynamic parameters. Design the human computer interface and write the member function of the system according to the main framework of the simulation program and the sub module. Design the program running process in different driving conditions of the vehicle. The main thread and three other sub thread is created in the main program based on the multi thread technology. In this way real-time simulation program can read the driver’s operation data in real-time and calculate the vehicle dynamics parameters.Development and test the Real-time Simulation System for Vehicle Dynamics. Design of human computer interface, compiled the member functions according to the main frame of the simulation program and the calculation model of each sub module. According to the previous analysis of the implementation logic, design the operation process of the system. Finally, through simulation and check the parameters of vehicle dynamics in emergency braking condition and a kind of compound condition, verify whether the software developed in this paper can achieve the design function and have a high computational accuracy.