發(fā)布時(shí)間：2018-03-22 06:24

  本文選題：隨機(jī)游走　切入點(diǎn)：羅經(jīng)　出處：《中國慣性技術(shù)學(xué)報(bào)》2017年01期 　論文類型：期刊論文

【摘要】：分析了隨機(jī)游走對羅經(jīng)方位對準(zhǔn)的影響,通過羅經(jīng)方位對準(zhǔn)的頻域誤差傳遞函數(shù),求出時(shí)域的單位脈沖響應(yīng)函數(shù),進(jìn)而推導(dǎo)出該系統(tǒng)在白噪聲驅(qū)動下的時(shí)域表達(dá)式,最后求出該表達(dá)式的統(tǒng)計(jì)特性,其標(biāo)準(zhǔn)差即為隨機(jī)游走對羅經(jīng)方位對準(zhǔn)的誤差公式。通過分析誤差公式可知,羅經(jīng)方位對準(zhǔn)的精度與隨機(jī)游走系數(shù)成正比,還與設(shè)置的半個(gè)二階阻尼振蕩周期的平方根成反比。當(dāng)陀螺隨機(jī)游走一定時(shí),單純的通過延長對準(zhǔn)時(shí)間并不能提高對準(zhǔn)精度,還需要延長二階阻尼振蕩周期,數(shù)值仿真驗(yàn)證了所提觀點(diǎn)的正確性。
[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.
【作者單位】： 北京計(jì)算機(jī)技術(shù)及應(yīng)用研究所;
【分類號】：TN96

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