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采用汽车转向系模型和汽车操纵稳定性模型来获得汽车转向时所需的总转向力矩和汽车的前轮侧向力,对不同载重、不同车速时的前轮侧向力与操舵力矩之间的比率进行了设定,按此设定的比率和转向时的汽车前轮侧向力确定操舵力矩和助动力矩;应用T-S模型进行模糊推理对不同工况下的比率进行了整合,得到能很好适应汽车速度、载重的变化的助力特性。通过算例可以得出,所确立的助力特性能很好提高轻便性和保证路感,助力跟踪性能良好,助力特性曲线具有新的特点。
The vehicle steering system model and the vehicle handling stability model are used to obtain the total steering torque and the front wheel lateral force required for the steering of the vehicle. For the front wheel lateral force and the steering torque at different loads and different speeds Ratio is set, according to the set ratio and steering wheel front wheel lateral force to determine the steering torque and moped torque; TS model fuzzy reasoning for different operating conditions were the ratio of integration, can get very Good adaptation to the car speed, load changes in the assistive features. Through an example, it can be concluded that the established assist characteristic can well enhance the portability and the road feel, assists the tracking performance well, and assists the characteristic curve with new characteristics.