The invention relates to a transmission ratio calculation method for a steer-by-wire system, which comprises the following steps of: fixing the value of steady-state yaw velocity gain under the input of a steering wheel, and establishing a transmission ratio-vehicle speed change model; speed limiting conditions are added for the transmission ratio-vehicle speed change model; smooth operation is carried out on the transmission ratio-vehicle speed change model after the speed limiting condition is added; adding a steering wheel angle correction variable in the transmission ratio-vehicle speed change model after smooth operation; and obtaining the vehicle speed and the steering wheel angle, and obtaining a transmission ratio value by using the transmission ratio-vehicle speed change model after the steering wheel angle correction variable is added. Compared with the prior art, the variable-angle transmission algorithm related to the vehicle speed and the steering wheel turning angle is designed based on the fixed yaw velocity gain value, the vehicle yaw velocity can be effectively reduced, and the safety and comfort during vehicle driving are improved.
本发明涉及一种用于线控转向系统的传动比计算方法,包括以下步骤:固定方向盘输入下的稳态横摆角速度增益的值,建立传动比‑车速变化模型;为传动比‑车速变化模型增加限速条件;对增加限速条件后的传动比‑车速变化模型进行平滑操作;在平滑操作后的传动比‑车速变化模型中,增加方向盘转角修正变量;获取车速和方向盘转角,使用增加方向盘转角修正变量后的传动比‑车速变化模型得到传动比取值。与现有技术相比,本发明基于固定的横摆角速度增益值,设计与车速和方向盘转角相关的变角传动算法,能有效降低车辆横摆角速度,提高车辆驾驶时的安全性与舒适性。
Transmission ratio calculation method, application and system for steer-by-wire system
一种用于线控转向系统的传动比计算方法、应用及系统
2023-08-18
Patent
Elektronische Ressource
Chinesisch
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