In order to reduce steering energy consumption and improve steering feeling of heavy commercial vehicle, a novel electro-hydraulic compound steering system is proposed, which combines the function of electro-hydraulic power steering and electric power steering. The electro-hydraulic compound steering system dynamic model is established and the coordinated control strategy of dual actuators is proposed by analyzing the structure and dynamic characteristics of electro-hydraulic compound steering system. The genetic algorithm is used to optimize the steering assist torque distribution, and an Elman neural network predictive controller with fuzzy compensation is designed to solve the nonlinear problem of the electro-hydraulic compound system. Finally, the simulation is carried out by using Amesim/Simulink. The simulation results show that the coordinated control strategy designed in this paper enables the electro-hydraulic compound steering system significantly better than the traditional electro-hydraulic power steering system in steering feeling and energy consumption.

中文翻译：

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汽车电液复合转向系统协调控制策略

为了降低重型商用车的转向能耗，改善转向感，提出了一种新型的电液复合转向系统，它结合了电液助力转向和电动助力转向的功能。通过分析电液复合转向系统的结构和动态特性，建立了电液复合转向系统的动力学模型，提出了双执行器的协调控制策略。采用遗传算法优化转向助力扭矩分配，设计具有模糊补偿的Elman神经网络预测控制器解决电液复合系统的非线性问题。最后，使用 Amesim/Simulink 进行仿真。