随机游走对罗经方位对准的精度影响分析

发布时间：2018-03-22 06:24

本文选题：随机游走　切入点：罗经　出处：《中国惯性技术学报》2017年01期 　论文类型：期刊论文

【摘要】：分析了随机游走对罗经方位对准的影响,通过罗经方位对准的频域误差传递函数,求出时域的单位脉冲响应函数,进而推导出该系统在白噪声驱动下的时域表达式,最后求出该表达式的统计特性,其标准差即为随机游走对罗经方位对准的误差公式。通过分析误差公式可知,罗经方位对准的精度与随机游走系数成正比,还与设置的半个二阶阻尼振荡周期的平方根成反比。当陀螺随机游走一定时,单纯的通过延长对准时间并不能提高对准精度,还需要延长二阶阻尼振荡周期,数值仿真验证了所提观点的正确性。
[Abstract]:The influence of random walk on compass azimuth alignment is analyzed. Through the frequency domain error transfer function of compass azimuth alignment, the unit pulse response function in time domain is obtained, and the time domain expression of the system driven by white noise is deduced. Finally, the statistical characteristics of the expression are obtained, and its standard deviation is the error formula of the azimuth alignment of the compass. By analyzing the error formula, it can be seen that the accuracy of the compass azimuth alignment is proportional to the random walk coefficient. It is also inversely proportional to the square root of half of the second order damping oscillation period. When the gyroscope walks randomly, the alignment accuracy can not be improved simply by prolonging the alignment time, and the second order damping oscillation period should be extended. Numerical simulation verifies the correctness of the proposed idea.
【作者单位】：北京计算机技术及应用研究所;
【分类号】：TN96

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