中文摘要：

针对激光陀螺动态特性中的相频特性，分析了相位延迟对导弹控制系统实时性和机动性的影响，并指出隔振器不会引入相位延迟，而有限冲击响应（FIR）滤波是造成激光陀螺相位延迟的主要因素．基于角振动台和惯性测量装置（IMU）台体，设计了4个试验状态，采用正弦激励法对激光陀螺的相频特性进行了实际测试．测试结果表明，隔振器的延迟时间最大不超过0．051ms，延迟时间主要来自FIR滤波，符合理论分析结果．

英文摘要：

According to the laser gyro＇s phase frequency characteristics this paper analyzed the influence of phase delay on real-time and mobility of missile control system, then studied the factors that cause phase delay of laser gyro, and pointed out that the vibration isolator does not bring phase delay, and FIR filter is the main factor for phase delay of laser gyro. Based on the angle vibration table and inertial measurement u- nit（IMU） body, four test states were designed and a practical test with phase frequency characteristics of laser gyro was conducted using sine excitation method. The test results show that the vibration isolator＇s delay time is no more than 0. 051 ms and the delay time mainly comes from FIR filter, which is in accord with the theoretical analysis results.