Research On Hardware-in-Loop Simulator System Of Intelligent Vehicle Longitudinal Control Based On ARM

Study on Intelligent Vehicle longitudinal control is an effective method on avoid crash and reduce traffic accident. The purpose of this paper is improving the active safety of vehicle, reducing the road accident rate, cutting down the loss caused by collision accident, guaranteeing safety driving by research on Intelligent Vehicle longitudinal control system. Vehicle longitudinal dynamic system hardware-in-loop simulator system platform is based, which is easy, cheap and achievable. Cruise control system and vehicle-to-vehicle longitudinal distance control system are researched for the vehicle forward collision avoidance system.The main research works are presented as follows:First, a simulation model of the vehicle longitudinal dynamic system is established with MATLAB/SIMULINK. In order to simulate the actual operating condition of the vehicle perfectly, and provide the satisfactory simulation platform for research work, the effect of non-linear elements about the engine, torque converter and automatic gear switch are taken into consideration in this model. The stateflow program based on the finite state machine (FSM) concept and its application in the switch control of simulation system has been also discussed.Second, cruise control system and vehicle-to-vehicle longitudinal distance control system are designed base on the function of control system. The simulation result indicates the simulation model and control arithmetic are satisfactory.Last, LPC2210 controller with ARM kernel and uc/os-II operating system are selected for integrating the vehicle longitudinal dynamic system hardware-in-loop simulator system platform. With a medium of serial interface, vehicle model in computer and LPC2210 controller have combined a set of vehicle longitudinal dynamic system hardware-in-loop simulator system platform. In order to ensure real-time characteristic of the Real-Time simulation system, DDE technology are used. DDE client/server are designed with VC++ and s function of MATLAB for the date communication of vehicle longitudinal dynamic system hardware-in-loop simulator system platform.