Abstract: A method system for automotive electronic braking using planetary roller screws as actuators are proposed and established in this paper. The core of this method is to achieve greater load- bearing capacity and equivalent reduction ratio by reducing the actual lead of the planetary roller screw, thereby eliminating the reduction mechanism and achieving the goal of simplifying the structure, reducing volume, and reducing weight. This paper expounds the method of realizing the integrated actuator by directly driving the nuts of the planetary roller lead screw by the motor rotor, and analyzes the basic relationship between the movement to ensure smooth braking and the dynamic calculation. The design example of a certain model of automotive electronic brake shows that compared with existing hydraulic brakes, the radial size of the electronic brake caliper is slightly smaller, the lead is less than 0.54, and the achievable reduction ratio is greater than 5, which can replace the existing hydraulic brakes.

Key words: Automotive brake; Electronic brake; Planetary roller screw; Integrated actuator

摘要： 文章提出和建立了一套以行星滚柱丝杠作为执行机构的汽车电子制动的方法体系。该 方法的核心是通过减小行星滚柱丝杠的实际导程，从而实现较大承载能力和等效减速比，进 而取消减速机构，达到简化结构、缩小体积、减轻重量的目的。阐述了电机转子直接驱动行 星滚柱丝杠的螺母从而实现一体化执行器的方法，分析了保证制动顺畅的运动和动力计算的 基本关系。某型号汽车电子制动器设计实例表明，汽车电子制动器与现有液压制动器比较， 电子制动钳径向尺寸略小，导程小于 0.54，可实现的减速比大于 5，可替代现有的液压制动 器。

关键词: 汽车制动；电子制动器；行星滚柱丝杠；一体化执行器