以某航空相机为试验载体,以工程中常用的两种陀螺为比较试验对象,本文完成了陀螺三个关键参数:输出噪声、分辨力、相位响应的标定。根据数据手册两个陀螺的噪声功率比为784:1,采用一种适合于工程应用的陀螺噪声功率测试方法,由于系统噪声的影响实测功率比为74:1;其次给出了陀螺分辨力与模数转换器之间的对应关系;再次针对陀螺数据手册中没有相位响应数据这一事实,设计了一个简便新颖的测试平台,完成了陀螺0~16 Hz 频带内的相位标定,标定误差小于5%,最后结合以上试验数据,深入分析了陀螺三个参数对伺服控制系统的影响。实践表明陀螺关键参数在具体设备中的准确标定有助于提高系统的整体精度与增强系统的稳定性。

Gyro’s three key parameters, output noise, resolution and phase response are calibrated in an aerial camera by using two types of devices which are commonly used in engineering. First, according to datasheet, two gyros’ noise power ratio is 784:1. By adopting a new scheme suiting for practical application, calibrated noise power ratio is 74:1 owing to system noise. Second, relationship between gyro’s resolution and analog-to-digital converter is presented. Thirdly, since there is seldom discussion about phase response in gyro datasheet, a flexible and novel experiment platform is designed, and then phases response in 0~16Hz is calibrated with error less than 5%. Finally, effects of gyro parameters on servo control system are thoroughly analyzed based on above results. Experiments indicate that the gyro parameters calibrated precisely in actual equipment improves system performance and stabilization greatly.