摘要
在研究环形激光陀螺的漂移时,通常文献的分析方法存在诸多矛盾。针对这种研究方法的不合理性,提出用阻尼振荡的方法来研究陀螺的漂移,属原创性革新。用阻尼振荡的频域表达式,加上采样量化噪声的频域表达式,作为噪声的功率谱密度,计算得到噪声的经典方差和Allan方差。此方差包含了所有可能的阻尼振荡效应的方差,用严格的公式计算是复杂的,实际计算时可根据具体情形作可行的近似,从而得到简单可用的激光陀螺的噪声的时域表达式。假设激光陀螺中存在的噪声由各种阻尼振荡组成,符合自然界的普遍规律,更主要的是,该假设得到了实验的验证,逻辑自洽,彻底地解决了通常文献的分析方法存在的矛盾。因此,用阻尼振荡的方法来研究激光陀螺漂移是合理的。
The usual method used to analyze the gyro drift in many articles is usually unreasonable. But how to analyze the gyro drift is really a problem. To solve this problem, we have created a new idea called the method of damped oscillation. This method is based on damped oscillations, which exist generally in nature, so we suppose the noise are composed by all kinds of them. Based on it, we can calculate the PSD of noises in ring laser gyro, and obtain traditional variance and Allan variance. This error model can be simplified in actual calculation, and by using it we can study the gyro drift reliably and conveniently. The method of damped oscillation is not only reasonable in logic, but also is proved by experimental results.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2009年第3期350-355,共6页
Journal of Chinese Inertial Technology
基金
总装重点项目(9140A09010807KG0191)
关键词
激光陀螺
漂移
经典方差
ALLAN方差
阻尼振荡
ring laser gyros （RLG）
drift
traditional variance
Allan variance
damped oscillation
