Optimized Coordinated Control Strategy for Dual-Motor Hybrid Powertrain With Actuator Response Hysteresis: Minimizing Effects of Network-Induced Delays

Network-induced delays can adversely affect mode transition quality in hybrid powertrains. Published literature has assumed that the transmission of signals is instantaneous, and solved the performance deterioration of mode transition process (MTP) caused by actuator dynamic response hysteresis. This paper develops this further by considering the coupling impact of actuator response hysteresis and network-induced delays on MTP of a dual motor hybrid powertrain, and designs a comprehensive coordinated control strategy to enhance mode transition quality. Firstly, the distribution characteristics of network delays within the system are analyzed through a consideration of the fundamental architecture of the mode-transition networked control system. Secondly, the influence of network-induced delays on the stability and dynamic performance of mode-transition closed-loop control systems with actuator response hysteresis is examined and a model for the MTP with actuator response hysteresis is created that considers asynchronous network-induced delays. A coordinated control strategy is then designed to improve the performance of MTP. HiL testing indicates that the proposed control strategy can reduce vehicle jerk by 58% in the presence of asynchronous random network-induced delays, while also reducing the relative torque fluctuation to 0.4.