摘要
针对激光陀螺动态特性中的带宽特性进行了研究。该文首先分析了激光陀螺的带宽特性指出,激光陀螺具有较高的理论带宽,并分析了影响实际带宽大小的因素,对激光陀螺的带宽进行了实际测试。将激光陀螺装在惯性测量装置(IMU)台体上,采用正弦激励法进行试验。按已设定的频率和幅值给角振动台施加正弦激励,分别采集激光陀螺信号和角振动台信号的输出,对每个频率点采集的数据进行傅里叶变换(FFT)处理并得出结论。为更好说明问题,先后在两台角振动台上进行试验,且IMU与试验工装分刚性连接和带减震器两种状态。测试数据说明,激光陀螺在IMU系统上测试的带宽大于120Hz,理论分析相符,完全满足现代导弹对激光陀螺的带宽要求。该试验可为激光陀螺信号的滤波、激光IMU系统设计等提供参考依据。
The bandwidth property of the dynamic characteristics of laser gyro has been researched in this work. The bandwidth characteristics of laser gyro were analyzed firstly and revealed that the laser gyro had a wide theoretical bandwidth. Then the factors affecting the actual bandwidth were analyzed and the bandwidth of the laser gyro was tested in practice. The laser gyro was installed in an IMLI body, using sine excitation method in the test. According to the predetermined frequency and amplitude, a sine excitation was applied to the angle vibration table and the signal outputs of the laser gyro and the angle vibration table were collected respectively. The obtained data from each frequency point were processed with FFT algorithm and the important conclusions were obtained. To deeply investigate the dynamic characteristics of laser gyro, two vibration tables were chosen through the tests, and two styles of rigid connection and connection with vibration isolator were used between IMU and the test tool. The test data indicates that the bandwidth of laser gyro is higher than 120 Hz, according with the theoretical analysis, and fully satisfies the bandwidth requirements of modern missiles for laser gyro. This test can be used as reference for laser gyro signal filtering and laser IMU system design.
出处
《压电与声光》
CSCD
北大核心
2012年第2期201-206,共6页
Piezoelectrics & Acoustooptics
