基于负载补偿的功率分流混合动力系统模式切换性能测试方法  

Power Split Hybrid System Mode Transition Performance Test Method Based on Load Compensation

作　　者：李豪迪 赵治国[1] 唐鹏 侯永平[1] Li Haodi;Zhao Zhiguo;Tang Peng;Hou Yongping(School of Automotive Studies,Tongji University,Shanghai 201804)

机构地区：[1]同济大学汽车学院,上海201804

出　　处：《汽车工程》2023年第10期1908-1922,1932,共16页Automotive Engineering

基　　金：上海市科委科技创新项目(21DZ1209700);国家自然科学基金(51675381)资助。

摘　　要：由于功率分流混合动力系统性能测试台架与实际车辆的动力学特性存在差异,导致测试台架难以精确模拟实车的行驶负载特性,使得功率分流混合动力系统模式切换性能测试的准确度不高。为此,本文提出一种基于负载动态补偿的功率分流混合动力系统模式切换性能台架测试方法。首先,建立了考虑实际车辆道路负载、模拟发动机、功率分流混合动力专用变速器(dedicated hybrid transmission,DHT)和测试台架传动系统的台架系统动力学模型;其次,针对纯电动至功率分流混合动力模式切换过程,对比分析了动力源的动态响应和台架系统模型的加载特性;然后,设计了基于转速闭环跟踪的转速前馈校正补偿器以提高负载模拟转速控制的抗干扰能力,并结合转矩前馈校正补偿器降低加载转矩的动态误差。最后,离线仿真和硬件在环台架试验结果表明:基于台架系统模型开发的负载动态补偿算法可提高测试台架加载精度32.67%以上,保证了功率分流混合动力系统模式切换性能测试的准确性。Due to the difference between the dynamic characteristics of the power split hybrid system per‐formance test bench and the actual vehicle,it is difficult for the test bench to accurately emulate the driving load characteristics of the actual vehicle,so the accuracy of the mode transition performance test of the power split hy‐brid system is poor.Therefore,a test method based on load dynamic compensation is proposed for mode transition performance of power split hybrid system in this paper.Firstly,a bench system dynamics model is established,con‐sidering the actual vehicle road load,emulation engine,power split dedicated hybrid transmission,and bench driveline system.Secondly,the dynamic response of power source and the loading characteristics of bench system model are compared and analyzed for the mode transition process from pure electric to power split hybrid.Then,a speed feedforward correction compensator based on speed closed-loop tracking is designed to improve the anti-inter‐ference ability of the load emulation speed control,and combined with the torque feedforward correction compensa‐tor to reduce the dynamic error of the load torque.Finally,the off-line simulation and hardware-in-the-loop tests are carried out.The results show that the load dynamic compensation algorithm based on the bench system model can improve the load accuracy by more than 32.67%,which ensures the precision of the power split hybrid system mode transition performance test.

关 键 词：测试台架模型 功率分流混合动力系统 模式切换 负载补偿 

分 类 号：U469.7[机械工程—车辆工程]