系统的闭环带宽严重影响光纤陀螺在振动、急转弯等环境条件下的测试精度，闭环光纤陀螺的实际带宽高达几kHz，无法采用一般的角振动台进行全频带频率特性测试，因此，频率特性的分析与测试成为了闭环光纤陀螺研究的一项重要内容。针对这种需求，根据系统的结构框图及工作原理，建立了数字闭环光纤陀螺的动态模型，推导出了系统的传递函数；在此基础上对数字闭环光纤陀螺的频率特性进行了分析，指出了改善系统
动态特性的方法.(The closed loop bandwidth of the system seriously affect the accuracy of fiber optic gyro vibration, in turn under the condition of the actual bandwidth of the closed-loop FOG up to several kHz, not by the angular vibration table of general full band frequency characteristic test, therefore, the analysis of frequency characteristics of the test and become an important content in the research of closed loop fiber optic gyro. According to this requirement, according to the structure and working principle of the system, establish a dynamic model of digital closed-loop fiber optic gyroscope, deduced the transfer function of the system; the frequency characteristics of digital closed-loop fiber optic gyroscope based on the analysis, pointed out the method to improve the dynamic characteristics of the system.)