空间目标轨道信息软件平台的建设

空间目标轨道信息是空间态势感知的重要要素,是空间碰撞预警、空间碎片环境模型和许多空间应用的基础。因而,空间目标轨道确定成为空间态势感知的主要任务之一。文章介绍武汉大学测绘学院正在开发建设的空间目标轨道信息服务软件平台,该平台拥有的主要功能有:利用多源数据的卫星/空间碎片轨道确定(包括初轨确定)与预报、大气质量密度模型精化、空间碰撞预警和半解析法快速精密轨道传播等。文章还针对软件平台功能的研究进展进行了综述,介绍了软件平台发展规划。     

一种星载软件在轨编程功能的设计和实现技术

对卫星姿轨控计算机软件在轨编程功能的设计和工程实现技术进行了研究，给出了在轨编程的原理、实现方法、可靠性设计、资源分配、接口要求和在轨编程的操作步骤。试验结果证明，提出的星载软件在轨编程原理和实现方法合理可行。     

航天测控软件测试过程新模型的应用研究

对几种传统的软件测试过程模型进行分析和比较,结合航天测控软件的特点,提出蝴蝶模型的软件测试新模型,对基于蝴蝶模型的航天测控软件测试过程进行探索和研究,旨在提高软件开发的质量和软件测试的效率.     

车辆监控系统中心通信软件的设计和实现

介绍车辆监控系统中心通信软件的设计与实现方法。为实现数据共享的集中控制 ,通信软件采用客户 /服务器的模式。使用多线程的编程技术 ,满足了对通信软件实时性的要求。     

六轴联动缠绕机数控系统应用软件的开发

纤维缠绕复合材料由于具有优良的性能而在许多领域广泛应用。数控系统作为其成型工艺装备的重要部分，如果采用标准数控系统，会使它的扩充和修改极为有限，并难以将自己的专用技术、工艺经验集成到控制系统中去，且成本较高。针对这些情况，文中提出以IPc和多轴运动控制器为基础构成开放式的六轴缠绕机数控系统，阐述了该数控系统的硬件构成，并重点介绍了系统应用软件的结构、系统软件的模块化设计以及如何在win—dows环境下进行用户化开发。该数控系统的实际工程应用，验证了系统的实用性和开放性。     

基于单片机的数字温度表设计

在介绍某型机电式温度表组成及工作原理的基础上,论述了基于MCS-51单片机的数字温度表的设计方法,给出了硬件电路设计、模拟电源与放大器电路设计及软件设计,用AEDK51仿真器完成了硬软件调试.该设计克服了机电式温度表摩擦、温度变化等因素引起的指示误差大的弊端,提高了温度表的指示精度.     

Development of a PC-based Open Architecture Software-CNC System

As a key technology in the field of advanced manufacturing, an open architecture controller is studied. In order to develop an open architecture software-CNC system on personal computer (PC) according to open modular architecture controllers (OMAC). First, the software and hardware platform is chosen and software realization methodology for the CNC system is determined. Second, static mod- eling methods of an open architecture controller inclusive of object-oriented (OO) programming technology, dynamic link library (DLL) technology and system modules partition are investigated. Third, the dynamical behavioral modeling and the data flow representation of open architecture controller are discussed, which are both described in hierarchy finite state machine (FSM) model. Fourth, a reusable software module model is established to develop software function module library. Finally, a 3-axis milling machine tool test-bed, named for HIT-CNC, is successfully designed by means of the constructed software function module library and the system configuring method. The experimental results show that, besides increasing the degree of reusability and openness, application of above-mentioned method- ology leads to significant decrease of development time as well as maintenance cost.     

FEM Analysis of Spring-backs in Age Forming of Aluminum Alloy Plates

The age forming technology, characterized by huge spring-backs, has been developed to manufacture large integral wing-skin panel parts, which necessitates devising a method of predicting spring-backs. A 7B04-T7451 aluminum alloy creep test in tension is accomplished at 155 ℃, and the creep curves are obtained. The material constants of the mechanism-based creep constitutive equations are determined through experiments. The age forming process and the spring-backs of 7B04 aluminum alloy plates are analyzed using the commercial finite element software ABAQUS. The effects of plate thickness and forming time on spring-backs are researched. The spring-backs decrease with the increase of plate thickness and forming time. The test results verify the reliability of the finite element method （FEM） analysis.     

Numerical design optimization of compressor blade based on ADOP

An aerodynamic design optimization platform(ADOP) has been developed.The numerical optimization method is based on genetic algorithm(GA),Pareto ranking and fitness sharing technique.The platform was used for design optimization of the stator of an advanced transonic stage to seek high adiabatic efficiency.The compressor stage efficiency is increased by 0.502% at optimal point and the stall margin is enlarged by nearly 1.0% at design rotating speed.The flow fields of the transonic stage were simulated with FINE/Turbo software package.The optimization result indicates that the optimization platform is effective in3Dnumerical design optimization problems.      

SAE AS4893《通用开放式结构(GOA)框架》评析

介绍和分析了SAE AS4893《通用开放式结构(GOA)框架》的编制背景、主要内容和应用原则;并与目前流行的开放式结构ASAAC、ISO OSI及POSIX进行了比较;最后分析了我国制定相应标准的必要性和可行性,并提出了相关标准化工作的建议。