矢量调制法的测量精度研究

以使用光纤陀螺进行地速测量为例，介绍矢量调制法原理，研究矢量调制法测量机理。理论分析和实验结果表明，使用适当的数据算法和增益可以提高测量系统的绝对精度，并且测量系统的相对精度高于绝对精度。矢量调制法经过调制一解调，使用频域方法去除了偏置、漂移等测量误差，可提高测量精度。矢量调制法的理论分析与实验分析结果一致，正确地进行了高精度测量。     

再入式光纤陀螺及其信号处理系统

光纤陀螺目前已经进入工程实用化阶段,其发展向高精度、低成本和小型化方向发展.再入式光纤陀螺是一种符合光纤陀螺发展趋势的,具有光明前景的新型光纤陀螺之一.本文介绍了再入式光纤陀螺的工作原理及其信号处理系统.给出了再入式光纤陀螺仪的信号处理系统试验结果.     

布里渊光纤环形激光器与布里渊光纤陀螺

布里渊光纤环形激光器具有增益方向性敏感、超窄线宽等极为鲜明的特点,在高精度传感、激光测量等领域具有很大的应用潜力。基于同腔布里渊光纤环形激光器的布里渊光纤陀螺（BFOG）以其灵敏度高、可靠性好等显著优势已成为下一代光纤陀螺的重要发展方向。介绍布里渊光纤环形激光器的工作原理并对BFOG的研究进展作以综述,指出其应用研究中急需突破的技术问题。     

再入式光纤陀螺实用化技术研究

再入式光纤陀螺（Re—FOG）使相互干涉的两路光循环进入光纤环,通过缩短光纤长度克服温度和应力引起的误差。本文研究了再入武光纤陀螺实用化的相关技术;提出了一种采用脉冲相位调制的信号检测方法;设计了专门的数据通讯模块。实验结果表明：所提出的信号检测方法可分离出所需循环次数的信号并解算出陀螺转速;所设计的通讯模块能保证实现陀螺与导航计算机之间的快速、稳定、准确的数据传送。再入式光纤陀螺可成为实用化的新型光纤陀螺。     

光纤陀螺与精确制导

阐述了光纤陀螺和惯性导航系统的发展历史及现状 ,详细分析了光纤陀螺产品在惯性导航系统中的地位 .同时对惯性导航系统的两大支撑技术——加速度计和全球定位系统 ( GPS)及其应用前景进行了简要的介绍 ,并且给出了最新 HARM精确制导系统的应用实例     

光纤陀螺姿态系统信号处理方案

光纤陀螺输出信号中存在较大的高频噪声，这降低了光纤陀螺姿态系统的解算精度。为此对信号进行多重积分，求取一个计算周期内载体姿态变化的旋转矢量表达式，从而得到一种新的信号处理方法，并讨论了其工程实现方案。仿真表明，与传统四元数算法比较，该方法在解算系统姿态的同时，能够较好地平滑噪声的影响。     

布里渊光纤陀螺光纤环形腔研究

提出了一种用于布里渊光纤陀螺的光纤环形腔设计方法。在分析了布里渊光纤陀螺原理的基础上,利用琼斯矩阵光学的理论以及光纤中的受激布里渊散射理论,详细研究了布里渊光纤环形腔的特性。通过对腔内外光强的细致分析,得出布里渊光纤陀螺环形腔对于腔的耦合系数及输入光强的要求。实验结果表明,该方法用于设置布里渊光纤陀螺工作点,能够保证斯托克斯光的最大传输效率,并有效抑制光路中的散粒噪声。     

光纤陀螺闭环方案研究与实验

在全光纤开环去偏光纤陀螺方案基础上,提出信号处理方法提高开环系统的动态范围和光学闭环的方案,对两个方案进行了原理和实验研究。测试结果表明,两种方案各能满足一定条件下的实用要求。     

光纤陀螺技术的军事应用及前景

介绍了光纤陀螺的原理及种类,通过将光纤陀螺与其它陀螺进行比较,总结出了光纤陀螺的优点.最后,综述了光纤陀螺在武器装备上的应用,并对光纤陀螺的应用前景作了预测.     

全数字开环光纤陀螺工作点实时控制

工作点控制是实用型开环光纤陀螺必须解决的技术问题,为此提出了全数字开环光纤陀螺工作点控制方案。在不增加硬件的情况下,通过提取陀螺信号中的二、四次谐波幅值获得陀螺工作点信号,并作为控制输入量,调整调制信号的幅度,实现对陀螺工作点的实时控制。实验表明,该方案在宽温度范围内使陀螺工作点稳定性达到1.16×10-3,偏差为3.1×10-4,在-40℃到60℃范围内的启动时间小于10s。     

矢量法在计算空间目标地面照度中的应用

从基本辐射理论出发，推导了空间漫反射目标地面照度的计算公式，详细讲解了采用矢量法对该公式中的积分进行计算的过程，矢量法可应用于任何外形能写出函数关系的目标。以球为例，实际计算了其星等值，并将结果与其他方法计算的结果进行了比较，它们完全一致。     

Use of the maximum probability method for increasing the accuracy of measuring distance by a range finder with frequency modulation of the sounding signal

Analysis of the error for a range finder using the maximum probability method for estimating the range is provided. The effect of noise interference, nonlinearity of the modulation characteristic of the range finder transmitter, parasitic amplitude and phase modulations are evaluated by means of computer simulation. Comparative analysis is given for algorithms of frequency measurement whose use makes it possible to exclude anomalous errors in using the maximum probability method. __________ Translated from Izmeritel’naya Tekhnika, No. 10, pp. 22–26, October, 2006.     

The bi-potential method applied to the modeling of dynamic problems with friction

The bi-potential method has been successfully applied to the modeling of frictional contact problems in static cases. This paper presents an extension of this method for dynamic analysis of impact problems with deformable bodies. A first order algorithm is applied to the numerical integration of the time-discretized equation of motion. Using the Object-Oriented Programming (OOP) techniques in C++ and OpenGL graphical support, a finite element code including pre/postprocessor FER/Impact is developed. The numerical results show that, at the present stage of development, this approach is robust and efficient in terms of numerical stability and precision compared with the penalty method.     

The lattice Boltzmann method and the finite volume method applied to conduction–radiation problems with heat flux boundary conditions

This article deals with the implementation of the lattice Boltzmann method (LBM) in conjunction with the finite volume method (FVM) for the solution of conduction–radiation problems with heat flux and temperature boundary conditions. Problems in 1‐D planar and 2‐D rectangular geometries have been considered. The radiating–conducting participating medium is absorbing, emitting and scattering. In the 1‐D planar geometry, the south boundary is subjected to constant heat flux, while in the 2‐D geometry the south and/or the north boundary is at constant heat flux condition. The remaining boundaries are at prescribed temperatures. The energy equation is solved using the LBM and the radiative information for the same is computed using the FVM. In the direct method, by prescribing temperatures at the boundaries, the temperature profile and heat flux are calculated. The computed heat flux values are imposed at the boundaries to establish the correctness of the numerical code in the inverse method. Effects of various parameters such as the extinction coefficient, the scattering albedo, the conduction–radiation parameter, the boundary emissivity and the total heat flux and boundary temperatures are studied on the distributions of temperature, radiative and conductive heat fluxes. The results of the LBM in conjunction with the FVM have been found to compare very well with those available in the literature. Copyright © 2008 John Wiley & Sons, Ltd.