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针对传统基于正弦波磁光调制的方位失调角测量系统存在测量精度不高的问题,提出了一种新的系统方位失调角测量模型以提高系统测量精度。通过分析传统的基于正弦波磁光调制的方位失调角测量原理发现,由于采用省略高阶项的贝塞尔函数展开式表示磁光调制后的信号,引入了信号截断误差和方法误差,影响了系统测量精度。在分析基础上推导建立了一种基于纯三角函数表示的无理论误差的方位失调角测量新模型并进行了仿真。仿真结果表明,利用推导建立的失调角测量新模型,系统测量精度明显高于传统方法,这对重新理解基于正弦波磁光调制的方位失调角测量系统原理、提高系统测量精度具有一定的参考意义。
Aiming at the problem of the traditional azimuth misalignment angle measurement system based on sinusoidal magneto-optic modulation, the new measurement system of azimuth angle misalignment is proposed to improve the system measurement precision. By analyzing the traditional measurement principle of azimuth misalignment based on sinusoidal magneto-optic modulation, it is found that the signal truncation error and the method error are introduced because the Bessel function which omits higher-order terms is used to represent the magneto-optic modulated signal. System measurement accuracy. Based on the analysis, a new model of azimuth misalignment measurement based on the pure trigonometric function is derived and simulated. The simulation results show that using the new model of misalignment angle measurement derived from the derivation, the measurement accuracy of the system is obviously higher than that of the traditional method, which is of reference significance for understanding the principle of azimuth misalignment angle measurement system based on sine wave magneto-optical modulation and improving the system measurement accuracy .