The invention relates to a PI creeping control method of an electric automobile based on target acceleration. The method comprises the following steps: acquiring a driving gear, an automobile speed value and a pedal opening degree; determining a crawling target vehicle speed and an actual vehicle speed; determining a creeping target acceleration, and looking up a table according to the speed difference between the creeping target maximum vehicle speed obtained by synthesizing the pedal opening and the current vehicle speed to obtain the target acceleration; determining the actual acceleration, and enabling PI crawling control. According to the PI creeping control of the electric vehicle based on the target acceleration, the torque can be smoother through PI creeping based on the target acceleration, and the driving feeling is improved; the abrupt change frequency of acceleration caused by pedal change is optimized; the current vehicle speed can better fit the target vehicle speed, and the problem of overshoot of the vehicle speed does not exist.
本发明涉及一种电动汽车基于目标加速度的PI蠕行控制方法,采集行驶档位,车速数值和踏板开度;确定蠕行目标车速,确定实际车速;确定蠕行目标加速度,依据合成踏板开度获取的蠕行目标最高车速与当前车速的速差查表获取目标加速度;确定实际加速度,PI蠕行控制使能。本发明电动汽车基于目标加速度的PI蠕行控制,基于目标加速度PI蠕行可使扭矩更加平顺,改善了驾驶感受;优化了因踏板变化造成的加速度的突变频率;可使当前车速较好的贴合目标车速,无车速超调问题。
PI creeping control of electric vehicle based on target acceleration
电动汽车基于目标加速度的PI蠕行控制
2021-08-13
Patent
Electronic Resource
Chinese
IPC: | B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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