The invention discloses a redundant dynamic braking backup scheme for an electronic parking system, and relates to the technical field of electronic parking system dynamic braking. The scheme comprises the following steps of: entering an electronic parking dynamic braking system; acquiring wheel speed signals of four wheels; reading the wheel speed value of the rear wheel, and calculating the deceleration value of the rear wheel; judging the gradient signal of the current vehicle by combining the longitudinal deceleration signal of the inertia measurement unit and the rear wheel speed deceleration value signal, and converting the gradient signal into the longitudinal gravity component of the vehicle under the current gradient by combining the vehicle weight; performing controlling to output a target braking force; forming an actual target braking force; and calculating the current clamping force, and following the target clamping force response to respectively control calipers on the two sides, thereby realizing the dynamic braking of the electronic parking dynamic braking system. The redundant dynamic braking backup scheme has the advantages that the current actual wheel deceleration is calculated in real time through the wheel speed signals, compared with the current wheel deceleration target, clamping and releasing of the calipers during dynamic braking are controlled basedon deceleration closed-loop control, and the effect of vehicle dynamic braking control is achieved.
本发明公开了一种冗余的电子驻车系统动态制动备份方案,涉及电子驻车系统动态制动技术领域,包括如下步骤:进入电子驻车动态制动系统;获取四个车轮的轮速信号;读取后轮的轮速值,计算后轮减速度值;结合惯性测量单元的纵向减速度信号和后轮轮速减速度值信号判断当前车辆的坡度信号,并结合车重转换为当前坡度下车辆纵向的重力分力;控制输出目标制动力;形成实际目标制动力;计算出当前夹紧力,跟随目标夹紧力响应,以分别控制两侧卡钳,实现的电子驻车动态制动系统的动态制动。本发明具有通过轮速信号实时计算当前的实际轮减速度,与目前的轮减速度目标比较,基于减速度闭环控制动态制动时卡钳的夹紧和释放,实现车辆动态制动控制的效果。
Redundant dynamic braking backup scheme for electronic parking system
一种冗余的电子驻车系统动态制动备份方案
2020-04-24
Patent
Elektronische Ressource
Chinesisch
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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