基于FMI标准的传动系统模型在环虚拟车辆仿真研究

Drivetrain model in loop simulation based on FMI standard

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。

Aiming at implementing drivetrain model in the loop simulation,an off-line virtual vehicle model was built in Simulink environment. The model consists of Simulation X drivetrain module and d SPACE ASM engine and vehicle dynamics module. All modules were parametrized 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 able to detect possible problems in vehicle systems and modify requirements in advance. This work prepares for the following hardware-in-theloop test.