浅谈产品方案设计阶段的“三化”设计

简析微机电惯性系统的特点及其在方案设计阶段开展"三化"工作的意义,通过介绍某微机电惯性系统方案设计中的"三化"工作实践,总结产品方案设计阶段的"三化"设计经验。     

惯性平台精密陀螺的生产试验鉴定

采用惯性平台的惯性制导系统(包括中、远程弹道导弹、运载火箭的制导系统),工作时间一般少于半小时,加速度为0～20g。在这些系统中,采用陀螺确定惯性基准,并在导弹飞行期间保持惯性平台的初始定位。     

平台回转情况下的火箭飞行状态计算及其在星光-惯性制导中的应用

本文给出了惯性平台制导系统工作过程中,平台的回转方程与火箭的飞行姿态方程。方程中考虑了惯性制导系统的各种工具误差,可在弹道计算与制导飞行的精确描述中使用。本文还给出了方程的简化形式。介绍了在惯性制导的不同领域内使用这种方程的方法,叙述了星光-惯性制导的弹道跟踪方案及其实现方法以及星光自动瞄准的设想。     

阿里安5故障调查结束

阿里安５故障调查结束阿里安５首次发射失败的故障调查工作已经结束。故障调查委员会７月公布的调查报告称导致这次发射失败的原因是惯性基准系统所用软件在设计和测试工作中有根本性的错误。一个本来没有必要使用的软件程序出现数值溢出，使两台惯性基准系统同时停止工作...     

微机械学发展概况及其在航天传感器中的应用

简要介绍微机械学发展概况及其在航天传感器中的应用，着重介绍微压力传感器、微加速度计和微机械惯性测量组合的工作原理，给出了结构简图，最后给出诺思罗普公司的微机械惯性测量组合中陀螺和加速度计的技术指标。     

铍与铍材惯性器件及其标准化

概述铍材惯性器件在国防领域的重要作用,简介铍材特性及其在惯性器件上的应用,分析铍材惯性器件标准情况.     

微型惯性测量装置的技术分析与发展建议

1.引 言 在惯性测量系统中,惯性敏感器件——陀螺仪和加速度计是其重要的组成部分,同时也是制约仪表小型化和微型化的瓶颈。长期以来人们一直在探寻使其小型化的途径和方法,基于微机电技术研究设计微型惯性测量系统一直是值得关注的领域。2.微型惯性测量装置的特征 2.1微惯性测量装置 微惯性测量装置包括微加速度计、微陀螺仪和微惯性测量组合。微惯性测量系统技术的基础     

单机产品质量问题快速归零模式研究

结合惯性器件产品的研制、生产、试验特点,对质量问题技术归零工作的组织管理流程和技术流程进行系统梳理和总结,从工作流程、知识积累和工具方法等方面明确了惯性器件产品质量问题快速归零要点,实现快速、准确、彻底地完成归零工作,形成了具有单机产品特点的质量问题快速归零工作流程和质量问题归零工作机制。     

江苏空管分局奥运气象保障项目顺利完成

为确保南京禄口机场作为奥运保障备用机场在奥运期间的气象保障安全可靠,江苏空管分局气象部门经多次协调和充分准备,于近日邀请江苏省气象局专家为分局安装了气象信息综合分析处理系统和多普勒雷达显示工作站软件系统,经调试两套系统均正常工作。     

战术导弹武器系统综合保障工作初探

根据战术导弹武器系统的发展以及现代化高技术条件下的局部战争样式对战术导弹武器系统提出的新要求，介绍了综合保障工作的定义以及开展综合保障工作的意义，系统分析了战术导弹武器系统综合保障工作的要求以及综合保障工作的管理。     

Monitoring of the space system

We have performed monitoring of the space system that includes the Earth, the Moon, the Sun, and the GPS satellite group. We have discovered semi-diurnal and diurnal periodicities in the number of satellites detected as well as in the altitude, latitude and longitude by a GPS receiver. We have revealed tidal deformations related to changes in the Earth?s orientation with respect to the Moon and the Sun.     

Optimal control of the Shuttle-Tethered-Subsatellite system

Alternate control laws based on an application of the linear regulator problem are developed for possible use in the operation of the Shuttle-Tethered-Subsatellite system. Control is assumed to be provided only by modulating the tension level in the tether as a function of the difference between actual and commanded tether line length, length rate, in (orbital) plane swing angle and swing angle rate. Necessary and sufficient conditions for stability of the (linear) system motion in the vicinity of its nominal local vertical orientation are developed. By proper selection of the state and control penalty matrices it is possible to obtain faster responses with no increase in maximum power levels for use in station keeping when compared with alternate control strategies. The weighting matrices are adjusted in a piecewise adaptive manner to provide control law gains in order to achieve a smooth deployment history. Successful retrievel is dependent mainly on the initial conditions and the rate at which the commanded length is reduced.     

Operation of the Spektr-R orientation system

Errors in pointing and sustaining Spektr-R are estimated based on the data of star sensors and an angular velocity vector meter, and the calculated values are compared with the observed values. It has been indicated that the achieved pointing accuracy is significantly better than the required accuracy and is independent of the number of star sensors used for this purpose; finally, the stabilization parameters correspond to the anticipated parameters. The original method for processing adjustment observations of the space radio telescope in the 1.35-cm range used to find a systematic deviation of 2.5′ of the telescope real electric axis from the nominal angular position has been described.     

Dynamics of the orbital cable system

The Orbital Cable System (OCS) consists of a vehicle with an engine, a long connecting cable (string) and a satellite probe for low altitude geophysical explorations. The vehicle orbits the Earth at an altitude of 200–250 km and tows a probe at an altitude of 100–150 km. The air drag is compensated by the vehicle engine thrust. In the OCS dynamics study the cable weight, elasticity and air drag are taken into account. The OCS stationary motions are found, and stability of these motions is investigated. The OCS periodical motions that are close to the stationary motions are found. Simple ways of the OCS deployment in orbit are described.     

GNSS导航信号体制兼容性分析

导航信号体制设计是卫星导航系统设计的重要方面。文中结合Compass、GPS和Galileo系统信号体制设计,分析了Compass系统拟采用的调制方式性能及与其他卫星导航系统的兼容性能,仿真了最坏接收情况下的Galileo系统的授权信号增强对Compass系统部分信号的性能影响。     

Communicating across the solar system

The technological advances of the Space Age have enabled us to project our senses through complex instruments to the edge of the Solar System and beyond. The link back to Earth by the communication channel has provided us with a wealth of information. The vast improvement in communication capability, by a factor of 10¹⁸, from the launching of the first earth satellites to the capacity of the Voyager telecommunications link across the Solar System, is symbolic of both our technical prowess and our cultural development. The combination of data rate and extreme distance at the Voyager 2 encounters with Uranus and Neptune in 1986 and 1989 will require the ground network to perform an engineering feat of unequalled magnitude. This paper describes the engineering challenge of communicating with spacecraft at the limits of the Solar System and the engineering responses to that challenge.     

The motion of a synchronous satellite in a system similar to the earth-moon system

The stationary motions of a synchronous axisymmetric satellite are studied in the field of attraction by the Earth and a third body whose parameters are close to those of the Moon. Equations of motion are written in canonical variables that take into account the resonance character of the problem. The plots characterizing the dependence of the rotation parameters of the satellite relative to the center of mass on the elements of satellite’s translational motion are presented. A picture is given that represents the initial configuration of the system for implementing stationary motions.     

伽利略卫星导航系统简介

概述全球卫星导航定位系统现状及伽利略系统建设背景与阶段工作,分析伽利略系统的特点及其发展趋势.     

敌我识别系统对抗技术研究

敌我识别系统在现代战争中具有重要地位。分析了敌我识别对抗系统的技术指标需求,通过仿真给出了侦察IFF信号的系统灵敏度。针对IFF系统存在的弱点,分析了敌我识别干扰的可行性,探讨了压制性干扰、欺骗性干扰和灵巧干扰的方法。最后对噪声压制干扰的干扰效果进行了理论计算。     

遥测网络系统发展与展望

遥测系统对于评定航空航天飞行器飞行试验结果、故障定位、健康监测和趋势预测等具有非常重要的意义。近二十年来,高码率遥测体制、双向通信及网络化遥测等需求不断增长,美国靶场司令委员会（RCC）下属机构靶场仪器组（IRIG）将遥测网络系统TmNS纳入到IRIG 106标准中,代表了下一代遥测系统的发展方向。在介绍TmNS发展历程的基础上,对TmNS的概念定义、典型架构、分层模型和网络数据消息、系统配置管理、时间同步、服务质量QoS、路由、源选择、安全等关键技术进行阐述和分析,结合我国遥测技术发展现状,总结其对我国遥测技术发展的启示,并对TmNS后续发展进行展望。