基于DSP的列车制动防滑系统的速度测量

Speed Measurement of Train Brake Anti-skid System Based on DSP

针对列车制动防滑系统的速度测量在测量精度和实时性两方面的要求,介绍了一种可变测速时区的速度测量方法。与传统测速方法相比,消除了测速齿轮加工偏差带来的测量误差,提高了测量精度,而且能将高、低速的测量统一于同一个计算公式,编程简单可靠;采用数字信号处理器(DSP)实现该测速功能,提高了速度和减速度的运算速度,满足了防滑控制的实时性要求。

This paper introduced a method of speed measurement based on a variable speed measurement time zone in order to meet requirements of measurement accuracy and real-time performance in the train brake anti-skid system.Compared with traditional method,the measurement accuracy was raised by reducing measurement error resulted from measuring speed gear cutting deviation,and programming task was simplified by using an identical speed computing formula on both high speed and low speed.Computation time of speed and deceleration is shortened by using a digital signal processor（DSP）,so it meets the real-time requirement in the anti-skid control system.