共查询到14条相似文献,搜索用时 46 毫秒
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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。 相似文献
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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 相似文献
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光纤陀螺姿态系统信号处理方案 总被引:1,自引:0,他引:1
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。 相似文献
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光纤陀螺闭环方案研究与实验 总被引:1,自引:0,他引:1
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。 相似文献
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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. 相似文献
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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.
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Translated from Izmeritel’naya Tekhnika, No. 10, pp. 22–26, October, 2006. 相似文献
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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. 相似文献
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Bittagopal Mondal Subhash C. Mishra 《International journal for numerical methods in engineering》2009,78(2):172-195
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. 相似文献