基于双加速度控制的ABS系统

The ABS Based on Two Kinds of Acceleration Control

汽车制动时的滑移率与车轮转速和车身速度有直接关系,但常见的汽车ABS(防抱死制动系统)往往只以车轮角加/减速度作为控制参量,这类ABS很难在不同情况下实现刹车距离最短的要求。文中介绍了一种基于车轮角加/减速度和车身减速度控制的ABS。阐述了其工作原理和硬件、软件设计方法,给出了完整的硬件组成、控制策略及程序流程图。该系统在保留角加/减速度控制的基础上进一步引进了车身减速度作为辅助控制量,能使整个刹车过程控制更为精细,刹车距离更短。

In automobile braking, the slipping rate is directly related to both the wheel rotational speed and the automobile body speed, but the common ABS （Anti-lock Breaking System） only uses the wheel rotational acceleration/deceleration as the control parameter. This kind of ABS can hardly help achieving the shortest stopping distance in different situations. This paper introduces one kind of ABS based on the wheel rotational acceleration/deceleration and the automobile body deceleration. It elaborates its working principle and the designing method on both hardware and software, presents the integrity hardware composition, the control strategy and the program flow diagram. The main characteristic of this system is that, on the basis of the wheel rotational acceleration/deceleration, it introduces the automobile body speed as a secondary control parameter, and thus makes control of the braking process more precise and the stopping distance shorter.