Distribution of gyroscope accuracy parameters for E-O stabilization platform
Huhai Jiang, Hongguang Jia, Qun Wei, Xin Zhang · 2011
E-O stabilization platform performance is partly decided by gyroscope precision, so it is important to choose a gyroscope with proper accuracy for an E-O stabilization platform. Based on the method of using a gyroscope in practice, gyroscope error model is established. With the gyroscope error model gyroscope accuracy parameters, that is bias repeatability, bias stability, scale factor, scale factor nonlinearity, output noise and bandwidth, are separately analyzed. According to the concretely required performance indices for an E-O platform, means of distribution of gyroscope accuracy parameters is proposed. A MEMS gyroscope is tested to get the parameters. Bias stability of the gyroscope is 0.08°/s while the bandwidth is 60 Hz. Output noise both at zero input and at nonzero input is analyzed by means of PSD to get the result that nonzero output noise is higher than zero output noise. Frequency response result of the gyroscope is dealt by means of correlation analysis. With all the tested result and the method of distribution of gyroscope accuracy parameters, it is clear that how the gyroscope errors works in an E-O servo system. The principle of distribution of gyroscope accuracy parameters is helpful for choosing appropriate gyroscope for an E-O platform.