谐振式集成光学陀螺解调特性分析

基于激光器频率谱检测技术,沿着光的传输方向分析了光波在谐振式集成光学陀螺系统中的传播,结合输入信号特征,建立频域内的数学模型,通过数值仿真和实验得到了调频检测系统下的解调曲线。按照光的传输方向:激光器、声光晶体移频器、光波导环形谐振器、探测器,利用贝塞尔函数展开和光场耦合模理论分析了谐振式集成光学陀螺解调特性,及其调频调制检测系统解调输出信号与谐振频率偏差之间的关系。通过数值计算,分析了解调曲线的变化规律,得到了施加在激光器压电陶瓷驱动器上调制波形的最佳调制系数。在实验上搭建了激光器频率调制解调技术系统,得到了解调曲线。数值仿真和实验结果表明,当调制系数M=2时,线性工作区间斜率最大,解调曲线最好。实测形状与理论分析结果相符,从解调信号得到±2×103rad/s的陀螺动态范围。

船载USB角误差解调特性海上标校技术研究

对船载USB的海上标校方法进行了研讨,首先分析了USB角误差解调特性变化原因、标校需求及原有标校方法优缺点,然后介绍了已经应用的新标校方法--同步卫星辅助法,最后提出了无外在目标配合标校新方法,并进行了可行性分析及应用讨论.

A case study of Chinese double-character vocabularies in modem China--Taking the completive pattern of ＂Exploitation of the Works of Nature＂ as an example

This paper focuses on the research on the vocabularies in the modem Chinese monograph with the division of history into periods and the special classes of the ancient codes and records. ＂Exploitation of the Works of Nature＂ is China＇s first encyclopedia on the production technologies of the agricultural and handicraft industries, published in 1637, with the contents covering many fields of the social production. It can fully reflect the terminologies of various industries in the late Ming Dynasty and the early Qing Dynasty and the real situation of the language at that time, which has a very high value of the linguistic research. The article extracts 5573 double-character compound words from the whole book, and uses the method of the quantitative analysis and the qualitative analysis to study the vocabularies of the whole book. Limited by the length of the text, the article carries out the investigation and analysis with the supplementary double-character words as the examples.