基于Cruise和Matlab的CVT车辆联合仿真

 针对无级变速器(CVT)常规速比控制器的局限性,提出了一种具有工程价值的改进PID速比控制算法,在分析CVT速比控制原理的基础上,在Matlab环境中设计了改进的速比PID控制器,同时考虑到单一的仿真软件不能精确地表达整车模型的参数,在Cruise中搭建了整车模型,将Simulink中模型以API形式导入并进行不同工况的联合仿真。仿真结果表明,设计的控制器和联合仿真研究的方法是可行的,改进的速比控制器能够很好地跟踪目标速比,具有良好的动态响应和较高的稳态控制精度,联合仿真研究的结果与原车型的实际状况具有良好的一致性,验证了理论分析的正确性,也体现了CVT在汽车燃油经济性和动力性方面的技术优势。

Co-simulation of CVT Vehicle Based on Cruise and Matlab

Aiming at the limitations of general ratio controller for Continuously Variable Transmission (CVT), an improved PID control algorithm, which has the engineering value, is presented based on the CVT ratio control strategy, an improved PID controller is designed in the Matlab environment. Moreover, considering that the single simulation software is unable to precisely express model parameters, the vehicle model is developed in Cruise, and co-simulation with Simulink model in term of API is conducted. The simulation results show that the designed controller and joint simulation are feasible, the improved speed ratio controller could well follow the target speed ratio and has the good dynamic response and high control accuracy in a steady state, the results of simulation are well consist with the actual status of the prototype cat, the correctness of the theoretical analysis is verified, and also reflected the CVT's technological superiority in terms of vehicle fuel economy and power.