The invention relates to an intelligent automobile brake system wheel cylinder pressure control method and device, and belongs to the technical field of intelligent automobile brake-by-wire, and the method comprises the following steps that a linear electromagnetic valve is used as a pressure increasing and reducing valve of an intelligent automobile brake system, and the linear electromagnetic valve uses a PWM signal as an input control signal; constructing a dynamic model of the linear electromagnetic valve, wherein the dynamic model comprises an electromagnetic subsystem model, a mechanical subsystem model and a fluid subsystem model; based on a dynamic model of the linear electromagnetic valve, determining the pressure increasing rate and the pressure reducing rate of the electromagnetic valve under different duty ratios of PWM signals, and constructing a relation table of electromagnetic valve coil current and wheel cylinder pressure change; and feedforward control over the pressure of the wheel cylinder is determined based on the relation table, the actual current of the electromagnetic valve is controlled to approach the expected current through the sliding mode variable structure controller, and accurate dynamic pressure control over the brake wheel cylinder is achieved. Compared with the prior art, the system has the advantages that the dynamic pressure of the brake cylinder can be accurately controlled, and the like.
本发明涉及一种智能汽车制动系统轮缸压力控制方法及装置,属于智能汽车线控制动技术领域,其中方法包括以下步骤:以线性电磁阀作为智能汽车制动系统的增减压阀门,其中,线性电磁阀以PWM信号作为输入控制信号;构建线性电磁阀的动力学模型,动力学模型包括电磁子系统模型、机械子系统模型和流体子系统模型;基于线性电磁阀的动力学模型确定电磁阀在PWM信号不同占空比下的增压速率与减压速率,构建电磁阀线圈电流与轮缸压力变化的关系表;基于关系表确定轮缸压力的前馈控制,并通过滑模变结构控制器控制电磁阀的实际电流向期望电流逼近,实现制动轮缸的动态压力精准控制。与现有技术相比,本发明具有能够实现制动轮缸的动态压力精准控制等优点。
Intelligent automobile brake system wheel cylinder pressure control method and device
一种智能汽车制动系统轮缸压力控制方法及装置
15.09.2023
Patent
Elektronische Ressource
Chinesisch
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 / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF |
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