干式DCT变速HEV换档过程鲁棒优化控制

发布时间：2018-03-18 23:28

本文选题：混合动力DCT　切入点：换档过程　出处：《机械工程学报》2016年18期 　论文类型：期刊论文

【摘要】：针对双离合器自动变速器(Dual clutch transmission,DCT)变速弱混合动力轿车,考虑到起动发电一体化电机(Integrated starter and generator,ISG)转矩响应特性较快、转速/转矩控制精度高等特点,对其介入到换档过程时不同动力源输出转矩和离合器传递转矩协调鲁棒控制问题进行研究。建立体现DCT换档切换过程阶段差异性的动力学模型;考虑转矩相的离合器执行机构的响应能力和惯性相的模型不确定性和外界干扰(转速量测噪声和发动机转矩响应滞后),优化决策了动力源合成转矩;在需求转矩切换阶段,切换发动机转矩至驾驶员需求水平并退出ISG电机;基于系统效率最优对动力源合成转矩进行分配。基于Simulink的仿真试验表明所提出的换档控制策略能有效协调控制动力源转矩,并对模型不确定性和干扰有较强的抑制能力。为进一步验证策略进行的动态台架试验表明,所设计的转矩协调控制策略有效地解决了DCT换档过程中ISG电机、发动机以及双离合器之间的实时转矩协调控制问题,使其具有较好的换档品质。
[Abstract]:In view of dual clutch transmission (dual clutch transmission) hybrid car with variable speed, considering the characteristics of fast torque response and high speed / torque control precision of integrated starter and generator ISG, etc. The problem of coordinated robust control of output torque and clutch transfer torque from different power sources in the shift process is studied. A dynamic model reflecting the difference of DCT shift process is established. Considering the response ability of clutch actuator with torque phase, the model uncertainty of inertia phase and external interference (speed measurement noise and engine torque response lag), the power source synthesis torque is optimized, and the torque switching stage is required. Switching the engine torque to the driver's requirement level and withdrawing from the ISG motor, the power source torque is allocated based on the optimal system efficiency. The simulation results based on Simulink show that the proposed shift control strategy can effectively coordinate and control the power source torque. The dynamic bench test to further verify the strategy shows that the designed torque coordination control strategy can effectively solve the ISG motor in the DCT shift process. The real-time torque coordination control problem between engine and double clutch makes it have better shift quality.
【作者单位】：同济大学新能源汽车工程中心;
【基金】：国家自然科学基金资助项目(51275355)
【分类号】：U463.212

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