光电跟踪系统作为外场中重要的目标观测与实时定位设备，有着不可忽视的作用。然而，随着目标机动性能的增加，对目标的实时响应就成了制约跟踪系统性能的关键。因此，采用更高性能的处理器和并行处理等手段来提高系统带宽、获得更好的实时性不失为一种好的方法。文章以PCIE总线为架构，以FPGA为协处理器实现数据的共享和分流，用两片DSP作为主要运算单元，搭建一个双路并行伺服控制系统，分别用来控制光电跟踪系统垂直轴和水平轴的两台伺服电机，替代以往的PCI总线架构和单片DSP同时控制垂直轴和水平轴电机的控制系统。采用上述结构不但大大提升了系统总线带宽，提高系统响应，还能克服单片DSP资源不足问题，更好地协调垂直轴和水平轴之间的相互配合。

Photoelectronic tracking systems play an important role in target observation and real-time positioning. However, along with the improvement of target maneuver performance, the problem of real-time response to target has become the key restricting the performance of tracking system. So the processor with higher performance and parallel processing is regarded as a good method for getting better system bandwidth and real-time performance. In this paper, based on CPCIE structure, using FPGA as the coprocessor to deal with data sharing and shunting and two DSPs as the main data processing unit, a dual-way parallel servo control platform is built to control the photoelectric theodolites at the vertical and horizontal axis separately. The proposed structure can not only greatly improve the bus bandwidth and the system response, but also the shortage problem of monolithic DSP resources can be overcome.