一种新的激光陀螺捷联惯导系统的误差参数标定方法

为了提高激光陀螺捷联惯性导航系统的导航精度，对惯性器件误差进行了原理上的分析和说明，并针对由国内某型激光陀螺构成的惯性测量器件进行了误差分析。在此基础上建立了精确的误差模型，并采用多位置标定法标定出了加速度计的误差系数，采用分立标定法标定出了陀螺的误差系数。     

基于AR模型的光纤陀螺建模方法研究

作为新一代的光学陀螺仪,光纤陀螺的性能决定着惯性参考系统的精度,为了提高光纤陀螺的精度,本文提出了利用时间序列分析法中的AR模型[1]对光纤陀螺零漂数据进行分析,采用最小二乘法对数据进行了处理和拟和,并在此基础上应用卡尔曼滤波算法对建模后光纤陀螺的漂移数据进行了滤波,有效地抑制了光纤陀螺中的随机误差,得到了陀螺信号的常项漂移趋势,提供了一种符合工程应用要求的光纤陀螺漂移模型。     

陀螺稳定平台的滑膜变结构控制实验研究

针对高精度陀螺稳定平台快速隔离扰动、稳定视轴的要求,设计了以挠性陀螺为惯性传感器的双轴陀螺稳定平台.介绍了该平台的结构,分析了影响平台稳定精度的因素,并针对速率陀螺反馈加传统PID控制不能实现稳定角度无静差的问题,尝试了一种滑膜变结构控制策略.试验结果表明,采用滑膜变结构控制方法后,陀螺稳定平台精度可提高50％以上.     

一种新的激光陀螺捷联惯导系统的误差参数标定方法

为了提高激光陀螺捷联惯性导航系统的导航精度,对惯性器件误差进行了原理上的分析和说明,并针对由国内某型激光陀螺构成的惯性测量器件进行了误差分析.在此基础上建立了精确的误差模型,并采用多位置标定法标定出了加速度计的误差系数,采用分立标定法标定出了陀螺的误差系数.     

多元回归分析法在光纤陀螺标定中的应用

全面系统地介绍了多元回归分析理论，给出了相应的计算公式，并将其成功应用在光纤陀螺标定中。以光纤陀螺标定为例，检验了拟合方程的正确性以及各个因素对量测的显著性，为提高惯性器件测量精度、组合导航精度打下基础。     

对无陀螺捷联惯性制导系统中的数值积分方法的讨论

介绍了无陀螺捷联惯性制导的原理和技术，并针对无陀螺捷联惯性制导系统中的数值积分问题进行分析和仿真，对各种积分方法进行了分析和比较，得到了一些有参考价值的结论。     

加速度计的动态特性对无陀螺微惯性测量组合性能影响的研究

本文以压阻式加速度计为例,探讨了其动态特性对无陀螺微惯性测量组合的影响.首先,建立了9个加速度计的无陀螺微惯性测量组合模型,并推导了该模型的导航方程,然后根据加速度计的动态特性改进了其导航方程,最后进行了仿真验证.从仿真结果可以看出,对于相同的加速度计,输入信号的动态特性越强,惯性组合的误差越大.因而选用动态特性好的加速度计有助于提高无陀螺微惯性测量组合的性能.本文为无陀螺微惯性测量组合走向实用化,提供了理论依据.     

半球谐振陀螺与光学陀螺的比较

近来在波音747飞机上成功的飞行试验证明,半球谐振陀螺可以与惯性级[0.01(°)/h]及环形激光陀螺相比拟。为了增加半球谐振陀螺产品的种类,Delco电子仪器公司正在开发两种小型半球谐振陀螺,这两种产品是专门为了低成本惯性测量装置和中成本惯性导航设备而设计的。介绍了小型半球谐振陀螺的惯性级和战术级传感器及其辅助电子线路的基本设计。为降低电子线路的成本并保持1ppm(10~(-6))的精度,重点介绍了数字控制和处理技术。由于低成本惯性测量装置的产品具有很强的竞争性,所以有必要将环形激光陀螺和光纤陀螺传感器与新型半球谐振陀螺传感器对照进行比较。     

捷联惯性测量单元配置方案及比较

在多加速度计测量运动体角运动信息原理的基础上,对无陀螺和单陀螺捷联惯性测量单元的配置方式进行了研究,给出了20多种配置方式;对几种典型配置方式进行了误差分析和比较,得出如下结论:①适当的9加速度计方案和单陀螺方案具有同一数量级精度;②载体转动角速度Ω=10 rad/s,加速度计安装点距载体质量中心距离ρ=20 cm,惯性测量单元连续工作30 s钟情况下,在无陀螺和单陀螺捷联方案中,要求加速度计综合精度约为1.2×10-6m/s2;最后,文章给出了一种新的测量高速三维转动体运动信息的6加速度计无陀螺方案。     

提高惯性仪表精度的途径

惯性仪表的精度是指惯性仪表允许误差的大小,允许误差小,就是精度高,允许误差大,就是精度低。本文主要介绍提高惯性仪表精度的重要性以及国外提高惯性仪表精度的主要途径。一、提高惯性仪表精度的重要性惯性仪表的精度对惯导系统的精度影响很大。单是陀螺的误差就占整个系统误差的16～     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.     

Stability of the Third Generation Intensifier under Illumination

The stability under illumination of transmission-mode GaAs photocathode sealed in the third generation intensifier is investigated by use of spectral response testing instruments. The variations of spectral response with the illumination times under weak and intense illumination are compared. The variations of photoemission performance parameters are also characterized. The results show that during initial several weak illuminations photocathode behaves no evident decay and a maximum sensitivity is achieved, while under intense illumination the sensitivity of photocathode begin to decrease largely at the first illumination. The calculated performance parameters show that the variation of surface escape probability with illumination times is a direct cause of instability of photocathode. It is also found that under intense illumination peak wavelength is moved towards short-wave and peak response is decreased, which shows that the ability of long-wave response of photocathode is decreased.     

An Experimental Study on Electro Chemical Machining of Microelectrode

Puts forward a new method in machining microelectrode by electro chemical machining （ECM） and plastic deformed theory. The procedure of this method is to machine the microelectrode according to the basic rule of ECM theory at first. Then, with the change of ECM machining parameters, one of the microelectrode ends is exerted by a load. As a result, the elastic and plastic deformation is produced at the machining section and the microelectrode diameter is reduced. It has been proved that the proposed method can determine the optimum machining parameters to machine the microelectrode of Cu.     

Unscented Kalman Filter for Autonomous Warship Attitude Determination

To address a problem of autonomous attitude determination algorithm using gravitational field and geomagnetic field observation, a new recursive optimization autonomous attitude estimation algorithm is proposed. The algorithm is based on unscented Kalman fiher(UKF), and can synchronously provide the attitude rate information. The simulated results show that the measurement precision of the method could be increased by 2 times compared to that of the common methods.     

Error Coefficient Estimation of Inertial Platformin Its Calibration

The error coefficient estimation of inertial platform in the course of its consecutive ground calibration is studiedA separate-bias algorithm is adopted to estimate the error parameters effectively. The ill-conditioning problem of the equation solution caused by the huge state dimension is also resolved. And the simulation result shows its validity.