数码识别芯片在摩托车数码点火器上的应用

飞利浦公司研制的LPC900系列单片机采用6倍速80C51内核,具有低成本、低功耗、低电磁干扰(EMI)、高抗干扰性及内建电源Brownout侦测、模拟功能、UART、I2C和片内RC震荡器的新一代单片机.本文介绍LPC900系列单片机用于摩托车点火器数码识别功能的设计原理,使数码点火器轻松增加了防盗功能.     

数据库技术在神舟飞船数码显示仪表中的应用

简述了飞船数码显示仪表软件的特殊显示需求、软件设计中所遇到的难点、问题解决方法和采用措施的有效性等方面的内容，阐述了在单片机系统的软件设计中，数据库技术的用途、应用方法以及所产生的效果。     

利用传送指令实现PLC的多组数码显示

ＦＸ２可编程控制器利用传送及刷新指令实现四位八组数据的数码显示．     

基才单片机的CRC算法的C51实现

论文通过讨论CRC算法的原理，推导出适用于51单片机的CRC算法，并用C51语言实现基于单片机的CRC算法。此程序在51系列单片机中有较好的可移植性，具有实际应用价值。     

固体火箭发动机激光点火装置研究

介绍了激光点火器的工作原理、结构及试验结果。已研制成功的激光点火器输出能量不小于1.0J，结构质量不大于0.9kg，实现了双路点火，其安全性、可靠性比传统的电能点火器有了很大提高，该装置已具备了固体火简发动机点火的实际应用功能。     

数码彩色电视机

随着电脑技术深入到各个领域,内置电脑的彩电也已进入了彩色电视机世界.西德ITT半导体研究中心研制的数码彩色电视机就是其中一种.目前该研究中心已经制造出3476、3486型高保真数码彩色电视机和3496型多控制数码彩色电视机,其中以3496型的功能最全,它具有70cm(28英寸)方角显像管、内置单晶体片多语言电讯文字解码器、光线放大器、柔和音/视频转换的频道转换装置、立体声和双伴音装置、低音反射式扬声系统,并备有红外线遥控器、有线电视调谐器和最新欧洲式视听传真等输入、输出连接器.可以加插和凝定彩色画面,预造30个台、直接选择99个频道.     

基于单片机的CRC算法的C51实现

论文通过讨论 CRC 算法的原理,推导出适用于 51 单片机的 CRC 算法,并用 C51 语言实现基于单片机的 CRC 算法.此程序在 51 系列单片机中有较好的可移植性,具有实际应用价值.     

多路并联半导体桥点火器同步发火故障机理研究

半导体桥点火器在工程应用中通常为多个产品并联在同一供电回路中使用，以实现火工装置同步点火。在实际应用中有时会出现某个火工装置点火失败的现象。当前，研究主要集中在半导体桥点火器本身电阻变化对单路点火过程电流、电压的影响，对多路并联半导体桥电流响应特性的研究较少。半导体桥点火器在多路并联同步使用时，作用机理及故障原理不清限制了其在该场合中的应用。文章设计搭建了多路并联半导体桥点火器点火电路，通过试验发现点火器多路并联使用时，支路电流存在突然下降或上升速度缓慢的现象，均可能造成点火器半导体桥区烧蚀不完全或瞎火。结合半导体桥点火器的点火机理分析得出电路电流突然下降会导致相变过程中止、电流上升较慢会导致相变能量不足，均会造成半导体桥电爆能量无法正常释放，进而无法正常激发内部起爆药，这是半导体桥点火器用在多路并联电路情况时出现点火失败的重要原因。     

用于声纳设备中的分布式遥控遥测技术

给出了一种在声纳站中用ＰＣ型微处理机和ＭＣＳ－８０３１型单片机构成的分布式数据采集和遥控系统。该系统利用ＰＣ机具有良好的人机界面、丰富的软件资源及灵敏多样的显示功能，以及８０３１系列单片机的多机通讯功能相结合。对相距几十米甚至几百米距离上的下位机进行控制和数据采集，在ＰＣ机的ＣＲＴ上进行显示和处理。     

混合比影响爆震波点火器工作过程之实验研究

爆震波点火器用于工程，其设计存在一个最佳结合点，使得在合适的管路中，爆震波传播速度、转捩距离、爆震波能量等能够符合点火器目标需求。为了研制适用于工程的爆震波点火器，在氢氧爆震波点火器基本特性试验的基础上，对初始混合气体的混合比等与爆震波特性的关系进行了研究。对实验结果进行分析认为。混合比对爆燃爆震转捩（DDT）距离影响较大，混合比大于3时，其转捩距离小于500mm。混合比增加时，爆震波传播速度会减小，但稳定的爆震波相对于波的混气的马赫数并小减小，维持在4．8左右。在初始混气压力不变情况下，质量流量可以提高爆震波能量，增强爆震波的点火能力。研究结论时爆震波点火器在工程中实际应用及以后的研究方向具有指导性作出。     

线谱对(LSP)分析在G.729语音编码算法中的应用

本文介绍了线谱对(Linear Spectrum Pair,LSP)分析的基本原理及其在G.729中的应用,同时分析比较了LSP参数与常用的线性预测系数LPC的区别,仿真结果表明,LSP参数的抗干扰能力远比LPC系数的抗干扰能力强。     

基于ISP1160的嵌入式USB Host技术研究

文章研究的对象是基于ISP1160和ARM控制芯片LPC2214的嵌入式USBHost。简要介绍了USB通讯数据流结构中的主机模块,叙述了ISP1160和LPC2214之间硬件连接的设计和实现,重点分析了ISP1160软件驱动的结构和USB主机堆栈的开发设计过程。     

基于P89C51X2BA单片机实现智能程控数字相位变换器设计

数字相位变换器在电子系统中的应用比较广泛,普通的数字相位变换器均由硬件电路搭接而成,系统复杂,故障率高。本文介绍了一种基于单片机控制的智能数字相位变换器的构建,弥补了普通的数字相位变换器的不足。以P89C51X2BA和逻辑门电路为基础,阐释了实现的原理和方法,给出了系统结构和软硬件构成。     

直流电动机驱动及控制的PROTEUS的仿真

本设计主要完成以AT89C51单片机为核心的PWM直流电动机的调速系统。并运用PROTEUS进行了基本部分的仿真,该系统包括速度给定、速度显示、速度测量。转速检测显示电路采用LED数码管,速度采用以AT89C2051为核心的小键盘进行输入,并把输入的速度值传给AT89C51。论文主要介绍了基于单片机用PWM实现直流电机调速的基本方法,PROTEUS的相关知识,及PWM脉宽调制的基本原理和实现方法。这在教学实验中能起到很大的作用,使学生在没有硬件的情况下能用软件虚拟出实验电路。使学生能更好的了解直流电动机驱动及控制。     

RADAR “SAIL” satellite concept

The Radar SAIL concept is based on the use of a rectangular antenna lying in the dawn-dusk orbital plane with the length (along speed vector) smaller than the height. Such geometry makes it possible to place the solar cells on the back of the antenna, to use gravity gradient stabilisation, and to implement multipath-free GPS interferometric measurement of the antenna deformation thus allowing structural relaxation. Less obviously, the geometry favours the RADAR design too, by allowing grating lobes and therefore a lower density of built-in electronic in the active antenna. The antenna can be thin and packed for launch inside a cylinder-shaped bus having pyrotechnic doors for the antenna deployement and bearing the rest of the payload and the service equipment. With respect to a standard design of performant missions, cost savings come from the bus, whose functions (AOCS, power supply) are simplified, from the launch since the mass budget and the stowing configuration become compatible with medium size rockets (LLV2/3, DELTA-LITE, LM-4.), and from the active antenna built-in electronics.

The RADAR SAIL concept is all the more cost effective when the mission requires a large, high and short antenna, i.e. high resolution (<5m), low frequency band (L or S or even P), high revisiting, multiple frequencies. Mission implementation and funding can be favored by the new capability to share the satellite between autonomous regional operators. Combined with ground DBF (digital beam forming) technique, the concept allows extremely simple and low cost missions providing a fixed wide swath (10 to 15 m resolution within 500km to 1000 km swath) for systematic surveillance or monitoring.     

Development of reliability-corrected cost model for Small Earth Observation satellites

In this study, a novel reliability-corrected cost model for estimating the development cost of highly agile small EO (Earth Observation) satellites is presented. In order to develop the cost model of highly agile small EO satellites, a database has been constructed consisting of 49 satellites carrying electro-optical payloads and having a launch mass between 100 kg and 1,000 kg that have either been developed or being developed within a time frame from 1991 to 2011. The cost model of top-down type was developed by analyzing the database statistically. The reliability-corrected CER (Cost Estimating Relationships) developed in this study implement multiple parameters-based complexity indexes. In addition, the Cost Correction Factor (CCF) and Low Cost Small Satellite (LCSS) adjustment factor were newly introduced as additional parameters for cost estimation. The reliability-corrected CERs for 26 EO satellites were used for verification of the cost model developed in this study. It was observed that there are approximately 7% of absolute average errors in the reliability-corrected CER. It is concluded that this cost model can provide cost estimates with a higher accuracy, as compared to conventional cost models such as USCM and SSCM. Finally, this paper also describes the results of cost estimation obtained by applying the developed cost model to highly agile small electro-optical satellites having specific performance requirements.     

The transcost-model for launch vehicle cost estimation and its application to future systems analysis

The first part of the paper describes the structure of the analytical cost estimation model (1982 edition) for launch vehicle development, fabrication and launch operations cost. Especially the new approach for a cost assessment of operations cost including refurbishment (in case of reusable vehicles), direct and indirect operations is presented for discussion and subsequent improvements by introduction of more reference values. The model uses the Man-Year (MY) as cost unit which is independent from inflation and currency exchange rate changes.

The second part of the paper deals with its application to future systems analysis and cost comparison with the example of a potential future European launcher (Post-Ariane-4) with 15 tons LEO payload capability: ten different two-stage launch vehicle concepts (expendable, semi-reusable and fully reusable) with storable and cryogenic propellants are analysed with respect to development cost and cost per launch.

The key problem for a future European launch vehicle is the optimum solution between the (limited) development effort and the desired minimum launch cost. More advanced (partially) reusable systems could provide an essential reduction in cost per launch, require, however, a higher development effort.

In such a case an analytical cost model based on realistic reference data can provide important data for the vehicle concept selection process.     

试论全面质量成本管理

质量成本管理在工业企业经营活动中起着举足轻重的作用,质量成本分析是财务管理的重要组成部分,加强质量成本分析有利于企业进行成本控制,有利于企业选择最优的质量成本模型,使企业以最小的投入获得最大的经济效益。     

卫星成本预测的一种动态建模结构

首先从卫星成本预测的决策对象分析入手，研究了卫星工程和卫星成本的结构，同时进一步分析阐述了卫星成本预测的发展状况，在此基础之上，把在其它领域应用较为广泛而且成熟的动态建模的思想及技术引入到了卫星成本预测模型之中，并结合卫星自身特点，对适合于卫星领域成本预测的动态模结构进行了研究与分析，获得了一种动态建模结构。