基于FMI标准的传动系统模型在环虚拟车辆仿真研究

针对虚拟车辆传动系统模型在环台架仿真问题,在Simulink环境中搭建了整车仿真模型,该模型由SimulationX双离合变速箱和差速器模块与d SPACE ASM发动机及车辆动力学模块共同组成,各模块都根据实车数据进行了参数化。对DCT离合器控制和挡位切换逻辑策略进行了研究,提出了一种基于FMI标准的协同仿真方法,并讨论了协同仿真模型各模块的步长设置。对比了模拟NEDC驾驶循环测试结果与实车转鼓试验台上测得的数据。研究结果表明:在早期系统验证阶段使用模型在环仿真具有较高的实用价值,可以提早发现系统问题并修改需求;该工作可为接下来的硬件在环测试提供了参考基础。

Drivetrain model in loop simulation based on FMI standard

Aiming at implementing drivetrain model in the loop simulation, an off-line virtual vehicle model was built in Simulink environ-ment. The model consists of SimulationX drivetrain module and dSPACE ASM engine and vehicle dynamics module. All modules were para-metrized according to extensive vehicle measurements. The clutch and shift control strategy were studied. The co-simulation method that based on FMI standard was proposed and the step size of each co-simulation module was discussed. The NEDC test was implemented on the vehicle model and the simulation results were compared to the test results from a real vehicle on the roller test bench. The results indicate that:the model-in-the-loop simulation has a highly pragmatic value in the early phase of system verification and validation. This method is a-ble to detect possible problems in vehicle systems and modify requirements in advance. This work prepares for the following hardware-in-the-loop test.