XC3S400AN在四频差动激光陀螺脉冲信号计数中的应用  

Application of XC3S400AN in Pulse Signal Counting for Differential Ring Lasers

作　　者：廖丹[1] 杨建强[1] 

机构地区：[1]国防科学技术大学,长沙410073

出　　处：《电光与控制》2009年第9期60-62,69,共4页Electronics Optics & Control

摘　　要：为了提高四频差动激光陀螺惯性导航系统的性能,需要应用快速高精度的陀螺脉冲信号计数技术。根据脉冲零头计数原理,应用高性能的FPGA芯片XC3S400AN,基于VHDL结构描述语言,对高精度高频率时钟信号进行时序控制及同步处理,设计出一种四频差动激光陀螺脉冲信号计数电路,并进行了实验测试。测试结果表明,电路能消除脉冲信号的±1计数误差,可长时间稳定工作,满足对陀螺脉冲信号计数实时性和精确性的要求,达到了预期目标。For improving the performance of differential ring laser inertial navigation system, fast and high accurate pulse signal counting technology is needed for gyroscope. According to pulse oddment counting principle, a pulse signal counting circuit for differential ring lasers is designed based on XC3S400AN, a kind of FPGA chip with high performance. The structure of the circuit is described in ~HDL language and realized through sequence control and synchronization process of high accuracy/frequency clock signal. Experimental tests were carried out for the circuit. The result shows that the circuit can eliminate the ＋ 1 counting error and work stably for long time, which can suit the demand of real time and accuracy for gyroscope pulse counting of the expected requirement.

关 键 词：激光陀螺 XC3S400AN 脉冲零头计数 VHDL 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]