摘要
半球谐振陀螺仪是一种新型长寿命、高可靠和高精度固体振动陀螺仪,其谐振频率会随环境温度的改变而变化,这种变化会对陀螺的控制精度产生不利影响。在介绍半球谐振陀螺基本控制原理的基础上,提出了一种基于Cordic算法的数字锁相环（DPLL）,并给出Cordic算法的原理及在现场可编程门阵列（FPGA）上的设计方法。通过Modelsim仿真软件给出了时序仿真结果,系统主时钟20 MHz,频率精度为0.004 6 Hz,相位精度为0.06°,7.2万门FPGA的资源利用率为65%。性能测试结果表明,在4.5~5kHz内,该低频数字锁相环实现了对半球陀螺频率、相位缓慢变化的精确跟踪功能。
HRG（Hemispherical Resonator Gyro） is a new kind of solid state vibratile gyro with high-precision, high-reliability and long-life. The resonant frequency＇s change with the temperature will have a disadvantageous effect on Gyro＇s control precision . The basic control principle of HRG is introduced in this paper, and a DPLL based on the Cordic algorithm is proposed. The Cordic algorithm principle and the design method on FPGA have been given. The simulation with Modelsim shows that the frequency precision is 0. 004 6 Hz and the phase precision is 0.06°,when the system main clock is 20 MHz. The efficiency of FPGA with 7.2 ten thousands gates is 65% . The results of performance test show that the slow frequency DPLL realize the function of accurate following the slow change of HRG＇s vibratile frequency and phase from 4.5 kHz to 5 kHz.
出处
《压电与声光》
CAS
CSCD
北大核心
2016年第6期934-937,共4页
Piezoelectrics & Acoustooptics
基金
重点预研基金资助项目(9140A09012015DZ36025)
作者简介
韩世川（1984-），男，重庆涪陵人，工程师，硕士，主要从事半球谐振陀螺技术研究。
