光纤光栅传感器在分布式测量系统中的应用

介绍了光纤光栅传感器在分布式测量系统中的应用，给出了光纤光栅测量节点的软硬件实现，并对实时性等影响分布式系统性能的因素做出了分析，最后，对于完善方案提出了构想。     

声速对河口区域回波测深的精度影响研究

回波测深是目前水深测量采用的主要原理,声速是回波测深精度的重要影响因素之一。文章分析了声速影响水深测量精度的基本理论,包括声速误差引起的垂直差、声线弯曲引起的测深差、回波位置偏移以及声速时空变化引起的测深差;同时以瓯江口水深测量项目为例进行了详细量化计算,归纳总结了河口区域水深测量期间声速对测深精度的影响,并就减少相应误差给出了参考建议。     

陀螺转子形状及变形分析和对陀螺性能的影响

介绍了新型陀螺仪转子的一些结构特性和材料组成。分析了会引起转子表面形变的几种因素,利用小波有限元方法根据工作环境对陀螺转子进行了离心变形、温度变形、压力变形以及这三种载荷下的耦合变形进行了仿真分析,分别给出了转子的形变分布矢量图。提出由于光子压力而产生的变形但没有定量分析,最后分析了由于转子的变形的而使转子表面不规则对陀螺性能产生的负影响,可以用这些参数来预测陀螺漂移性能,也可以通过数学方法来补偿由于转子表面形变而带来的干扰力矩,也为转子的设计和进一步优化提供了重要的参考依据。     

三维空间入水弹道测量的新方法

本文给出了只用加速度计不用陀螺或其它角运动敏感的传感器测量空间弹道参数的新方法。由于鱼雷导弹样武器模型在实验的发射阶段和入水阶段受到巨大的加速度和减速,同时又由于它们系长细比相当大的细长体,只用加速度计就比用陀螺有很大优越性,因为加速度计耐冲击、质量和体积都小。文中指出,为了测量六个弹道参数,至少要用六个加速度计,但为了提高试验准确度,本文也提出了用七个加速度计,九个加速度计和十个加速度计的测量方案,并提出相关的数据处理方程的解法。本文还就细长体实验模型对布置加速度计位置的限制,进行了分析,提出降低数据处理方程的条件数,避免出现病态方程和优化加速度计位置的方法。文章还给出了能得到高精度的试验数据处理方法。     

MEMS惯性导航传感器

对大多数导航应用而言,精度并不是最重要的因素,在满足精度的前提下,尽可能降低成本、缩小体积才最重要。MEMS(Micro Electro Mechanical System)惯性传感器在民用市场已得到广泛应用,在战术级的导航中也开始逐渐应用,这主要受益于利用科里奥利效应制造的各种类型的MEMS陀螺。目前还没有达到战术级应用的环形激光陀螺和光纤陀螺的精度水平,但MEMS惯性传感器深具潜力。本文介绍当前MEMS陀螺和加速度计制造技术的发展,重点讨论MEMS传感器的设计及性能,并展望MEMS惯性传感器的发展前景。     

磁悬浮陀螺转子转动惯量数学模型的分析

这种磁悬浮陀螺仪是建立在经典理论基础上,将惯性刚体转子与超导电子学相结合而发展起来的陀螺仪,它的随机漂移率减少到空前的高度.本文通过对新型陀螺转子的结构分析,建立了该陀螺转子的转动惯量的数学模型,并且分析了转子转动惯量的一些特性,给出了转子的惯量椭球与惯性主轴,建立了转子的惯性张量;通过分析转子的本体极迹(极点在惯量椭球上所画出来的轨迹)发现Z轴上是一对孤立的点,其余部分全是环绕Z轴的同心圆.在Z轴的附近区域来说,属于封闭型本体极迹,但在赤道面上对于过原点的一切轴线,它们的本体极迹是被赤道极迹连接起来的,所以属于分离型本体极迹.最后完成了对转子的随机漂移率和转子稳定性的分析.     

考虑陀螺效应的某燃机高压转子横向振动分析

考虑转子的陀螺效应,利用有限单元法推导了某燃气轮机高压压气机转子的传递矩阵,并建立了该转子-轴承系统的传递矩阵模型.采用多体系统传递矩阵法计算了转子-轴承系统的固有频率,研究了陀螺效应对其振动特性的影响.     

航向动态性能标校检测系统

提出了航向动态精度标校检测方法,给出了具体实施方案。该方案能解决陀螺导航装备出厂前或维修后的动态性能测试问题,对保证装备质量有着重要意义。     

永磁无刷直流电机霍尔位置传感器的安装

永磁无刷直流电机在各行各业的应用越来越广泛。在永磁无刷直流电机中,霍尔位置传感器经常用来测量电机的转子位置和转速。转子位置传感器的安装精度直接关系到永磁无刷直流电机的运行,因此如何安装传感器是非常重要的。本文结合作者多年从事无刷直流电机开发的经验,提出了简便易行的霍尔位置传感器安装方法。     

惯导辅助的GPS船舶测姿系统关键技术研究

针对现有的多种周跳检测与修复、整周模糊度求解算法以及单纯GPS测姿和单纯惯导测姿的优缺点,提出了一种适合船舶姿态测定的方案。该方案结合平差原理和多普勒信息处理周跳,并对LAMBDA算法进行了改进和优化,采用多种约束信息来剔除不正确模糊度组合,最后采用基于Kalman模型进行陀螺与GPS航向角数据融合。实验结果表明,在0.497m基线条件下,航向角精度优于0.3°,俯仰角(横滚角)测量精度优于0.5°。     

Analysis of deformation of rotor and influence on the performance of gyro based on B-spline wavelet FEM

Some construct characteristics and composing material of the new Gyro＇ s rotor are introduced. Some factors resulting in deformation of the rotor surface are analyzed. Under different loads such as the fo,＇ce of deflecting center, the change of temperature, the fo,ce of pressure and couple factors, the deformation of rotor is analyzed with the wavelet finite element simulation software. The vector distributing map of rotor reformation is given. The deformation resulting from the pressure force of photon is studied. Finally, the influence on Gyro＇ s performance because of anomalous surface of rotor due to deformation of rotor is researched and the result is useful to forecast the performance of the drift of gyroscope. The disturbing moment resulting from the deformation of rotor can be compensated using the mathematic method, and provides an important reference for both design and optimization of the rotor.     

The research on signal-obtaining pattern for a new type of gyroscope

In this paper, a photoelectric signal obtained scheme via equator triangle pattern engraved on rotor is discussed and the mathematic model is deduced in the case which is deflexion between rotor axis and the coordinate frame of case. The deflexion error and coupling error under the situation are analyzed. Finally, three methods of engraving based on the spherical triangle pattern are presented. The error models of various methods are built up and the simulation curves are provided respectively. We have done the primary experiments on the surface of rotor using this method. It can be seen from the enlarged figures that the rim of the pattern is smooth and the demand of sensor resolution is satisfied by and large. The results of study supply reference for signal obtaining.     

电容法在多相流参数测量领域的应用研究

目前,多相流技术已经渗透到工作生产的各个领域,多相流参数的测量受到普遍关注。多相流参数的测量方法种类繁多,其中电容法的研究倍受青睐。本文对电容法在多相流参数测量领域的研究进展进行了较为详细的介绍,对其发展中遇到的问题进行了阐述,并对电容法的发展前景进行了展望。     

靶场测控多传感器的布站优化综述

雷达、光电设备、卫星、声纳、以及无源探测传感器等构成了靶场测控设备的立体传感器网络,对其合理的布站及优化管理不仅能有效地节约资源,还能提高对被试装备预警探测性能试验的有效性和可靠性。针对靶场电子装备试验面临的恶劣的环境,对靶场各种测控传感器的布站及优化进行了分析和探讨。     

Study of the helicopter blade running elevation measurement system

Helicopter blade running elevation measurement is an important measure target in helicopter blade dynamic balance experimentation. The elevation influences the helicopter＇ s security and other performance capabilities. In testing, however, it has been difficult to measure the elevation when the rotor reaches high speeds. To get a simple, fast and highly accurate measurement system, photo electricity technology was applied to measuring the blade running elevation. Discussed is the measurement principle of blade running elevation, tire design of the measurement system and analysis of the measurement precision.     

二阶波浪力数值计算与试验方法研究

目前准确测量波浪中船舶与海洋结构物二阶波浪力是一个难点,本文提出采用半约束法和弹簧系统约束法两种试验方法测量二阶波浪力.首先介绍了半约束法和弹簧系统约束法两种试验方法,然后针对某散货船采用这两种方法开展了二阶平均波浪力试验测量研究,最后将试验结果与理论计算结果进行了对比,并对两种试验方法的优缺点进行了分析.研究结果表明:两种试验方法均能准确测量二阶平均波浪力.     

加筋圆柱壳结构振动与辐射噪声关系分析

采用传递函数法和声传递矢量(ATV)得到了加筋圆柱壳从结构测点加速度到声场测点声压的声辐射传递函数,以及结构测点加速度到辐射声功率之间的传递函数。通过对两个加筋圆柱壳结构的振动与辐射噪声关系的数值分析,讨论了结构测点加速度与辐射噪声之间的相互关系,结果表明结构测点加速度与辐射声功率和辐射声压之间并非单调关系。     

基于灰色层次分析法的舰船总体设计方案评估研究

舰船设计方案涉及因素众多,有些因素易于量化,有些因素难以量化,往往给方案优选工作带来诸多困难。针对舰船研制特点,在建立方案评估指标体系基本框架的基础上,引进灰色层次分析法对舰船设计方案进行研究,以期降低决策的主观随意性,使决策更加科学合理。     

A dual measurement method of strain and temperature

With the rapid development of China's foreign trade, the coastal and inland waterway transport has been increased rapidly. The potential market for marine engines is more and more obvious. The measurement of the engine temperature and strain becomes very important. The fluorescence fiber sensors are broadly used to measure temperature, concentration, and pH value, etc. The fluorescence sensing systems are based on different principles, namely fluorescence intensity, fluorescence intensity ratio, and fluorescence lifetime. The fluorescence lifetime is an effective parameter for sensing purpose, because it is independent of the intensity of the pumping source and does not need expensive narrow-band filters. An experiment system has been established, in which some samples were produced to measure the fluorescence lifetime and temperature characteristics and the relationship of the strain and temperature versus the fluorescence lifetime was achieved at the same time. The experiment result was fitted and analyzed. The test results show that the fluorescence lifetime decreases with the increasing of temperature. The change of fluorescence lifetime with the strain is inconspicuous comparing to that with the temperature.