基于1553B总线星时精确产生硬件秒脉冲的方法

本设计在整星不能提供硬件秒脉冲的情况下,利用单片机对1553B总线协议芯片进行配置,使其只对星时数据产生中断.该中断触发外围电路自主产生硬件秒脉冲信号,进而实现校时.由于该方法为纯硬件的触发控制环节,在不考虑卫星平台发送星时数据随机误差的情况下,其误差仅取决于硬件的延时误差,通过标定可达到与整星提供秒脉冲相同的校时精度,而大大优于不采用校时的情况.此外,该成果通过对触发电路外围进行配置,可以实现任意脉宽及方向的秒脉冲信号输出,可满足不同型号对不同类型秒脉冲信号的需求,具有很大的灵活性及广泛的适用性.

The Method to Precisely Produce Hardware Pulse Per Second Based on the Satellite Time of 1553B Data Bus

The major point of this method is to apply the process of satellite time, and use hardware pulse per second produced by 1553B peripheral circuit which is controlled by single chip micyoco to achieve synchronization in case the satellite platform cannot provide hardware pulse per second. Since this method only involves hardware trigger and control, errors are all about delays caused by hardware, without considering accidental errors of satellite time transmitted by satellite platform. Through calibration, this method achieves synchronization as precise as that of the pulse per second provided by satellite platform, which is much better than the method that cannot realize synchronization. In addition, this method achieved outputting pulse per second in any width and any direction by arranging peripheral trigger circuit, and can also meet the needs of different models for different types of pulse per second, which is flexible and has wide application