LRE试验台加注系统故障建模与仿真分析

在对液体火箭发动机试验台推进剂加注系统进行结构分析的基础上,对加注系统进行模块化分解,建立其工作过程模型,分析了动态系统中故障注入的方式,对加注系统的两种典型故障进行了故障建模与仿真分析,仿真结果很好地描述了故障状态下加注系统的工作性能,通过分析仿真结果能进一步丰富和完善试验台故障知识库。

Abstract：

Based on the structural analysis for LRE test-bed propellant filling system. The filling system was modularized and its working model was built. The method of injecting fault was analyzed. Two typical fault modes were injected into model and the simulation results were analyzed. The results described preferably filling system＇s working capability in fault condition. The simulation results and analysis can also be used to enrich and perfect the fault knowledge base of test-bed.     

系统效能的概念框架及度量

以抽象系统的行为过程为研究对象,提出了一个具有普适意义的系统效能定义及其概念框架,建立了一个将系统效能分解为效能指数和效能因子的系统效能度量方法,将系统效能的计算转化为静态的效能指数与动态的效能因子的乘积。其中,效能指数反映系统能力与系统目标之间的匹配程度,效能因子反映系统行为表现相对于系统能力的偏差。所提出的概念和方法可用于对各类系统的效能分析与评估。

Abstract：

Based on behavior and performance of abstract system,a general definition of system effectiveness was given. The measure method of system effectiveness was derived and a conceptual framework of system effectiveness was constructed,which indicates that the value of system effectiveness equals to the product of system effectiveness index and system effectiveness factor. The system effectiveness index implies the match degree of system capability and system objective,and the system effectiveness factor implies the deviation of system performance from its capability. The concept and measure method can be applied to the analysis and assessment of system effectiveness.     

微带分支电桥设计的鲍威尔法仿真与设计

环形微带分支电桥是微波集成电路中常用的电路结构,数值仿真能够有效地分析这种电路的性能。针对任意形状的环形微带分支电桥设计比较困难的问题,采用了平面电路概念进行分析并给出模型。运用考虑了边缘场效应与辐射效应的围道积分方法进行分析并给出电磁场的解析解,最后使用鲍威尔法对电桥进行优化仿真设计。在实际中制作了这种电桥并进行了测量,实测结果与模型仿真结果很好吻合,验证了本方法的有效性。

Abstract：

The hybrid ring has been widely used in the design of microwave integrated circuits. Numerical simulation can analyze the capability of this circuit effectively. To solve the difficult problem of designing an arbitrarily shaped hybrid ring,a synthesis of the circuit pattern of hybrid ring based upon the planar circuit concept was described. The contour-integral method by including the fringe fields and radiation was used for the circuit analysis and the analytical results were pointed out. Powell＇s method was used for the circuit analysis and the optimization. Practical hybrid circuits having optimized circuit patterns were constructed and their characteristics were measured. The results agree well with the theory,demonstrating the validity and effectiveness of the proposed synthesis method.     

基于SimMechanics的两轮机器人建模与仿真

介绍了基于SimMechanics的两轮机器人机电控制系统建模与仿真研究的方法,建立了仿真模型并进行了运动控制仿真分析。利用MATLAB/Simulink强大的运算功能和SimMechanics提供的模块集,可以省略建立运动机构数学模型的推导过程,具有系统建模直观和仿真功能强大的特点,为机电控制系统的建模仿真提供一个方便的工具。

Abstract：

A method of modeling and simulation of Two Wheel Robot based on SimMechanics was discussed. The method takes advantage of the powerful computing function of MATLAB/Simulink and SimMechanics modeling block, It is a convenient and visual modeling tool in mechanical control system analysis and simulation.     

基于多粒度模型的导弹MDO方法研究

根据MDO环境的建模/仿真需求,针对某导弹多学科设计优化问题,分析了多粒度模型建模/仿真的必要性,以气动学科为例探讨了导弹MDO环境中多粒度模型的建模/仿真方法,研究了有限元分析软件FLUENT及其前处理软件GAMBIT的集成方法,并利用响应面分析、工程估算、数值计算三种方法对某导弹的气动学科进行多粒度的建模与解算,将输出的主要气动参数与风洞试验数据进行了比较与分析。研究结果表明多粒度模型的建模/仿真对提高导弹MDO效率具有重要意义。

Abstract：

According to the requirement of modeling and simulation in MDO environment, with consideration of missile’s Multidisciplinary Design Optimization problem, the necessity of modeling and simulation on multi-granularity model was analyzed. Taking pneumatic domain as an example, method of modeling and simulation on multi-granularity in missile’s MDO environment was discussed. The integration methods of finite element software FLUENT and its pre-processing software GAMBIT were studied. Through abundant experiments, data results of computing multi-granularity model were given using three methods, namely Response Surface Analysis, engineering prediction method and numerical computation method. Finally, comparison of the data got from above and from wind tunnel test was analyzed. The study results show that modeling and simulation on multi-granularity model are significant to improve MDO efficiency.     

某舰炮非线性动力学分析

基于非线性动力学理论,研究了某舰炮发射过程中的动力学响应问题。建立了某舰炮含身管和摇架导轨之间大位移滑动接触的有限元模型,运用隐式时间积分方法模拟该炮发射的后坐复进过程,获得了炮口的后坐复进位移和速度响应以及关键部位的动态应力。计算结果可为舰炮的设计和优化提供一定的理论依据。

Abstract：

Based on nonlinear dynamics,muzzle＇s responses during the whole firing course of a naval gun were investigated. The finite element model of the naval gun was established,including large sliding contact between barrel and cradle guide of the gun. The recoil and recuperation process of the gun was simulated by implicit time integration dynamics method,and the responses of displacement and velocity on muzzle and key part dynamic stress were obtained. The calculation results provide the academic basis for the design and optimization of naval gun.     

Efficient analysis of dielectric radomes using multilevel fast multipole algorithm with CRWG basis

A full-wave analysis of the electromagnetic problem of a three-dimensional （3-D） antenna radiating through a 3-D dielectric radome is preserued. The problem is formulated using the Poggio-Miller-Chang-Harrington- Wu（PMCHW） approach for homogeneous dielectric objects and the electric field integral equation for conducting objects. The integral equations are discretized by the method of moment （MoM）, in which the conducting and dielectric surface/interfaces are represented by curvilinear triangular patches and the unknown equivalent electric and magnetic currents are expanded using curvilinear RWG basis functions. The resultant matrix equation is then solved by the multilevel fast multipole algorithm （MLFMA） and fast far-field approximation （FAFFA） is used to further accelerate the computation. The radiation patterns of dipole arrays in the presence of radomes are presented. The numerical results demonstrate the accuracy and versatility of this method.     

卫星导航系统精度试验分析的设计与实现

导航系统精度（NSP,Navigation System Precision）分析是卫星导航系统定位、测速和授时性能仿真分析与评估的重要组成部分,NSP的可用性和连续性是导航系统服务能力的重要标志之一。研究了NSP的相关概念,分析了NSP的可用性和连续性算法,在此基础上提出了面向卫星导航系统的NSP仿真模型框架,并基于此框架设计和实现了支持NSP分析的插件工具,最后针对格网分辨率为5°×5°的区域格网进行了NSP的仿真试验分析,验证了提出的仿真模型框架和设计的插件工具的正确性。

Abstract：

Navigation System Precision Analysis is a part of the simulation analysis and evaluation of the Navigation System＇s performance on positioning,velocity-measuring and time-telling,and the availability and continuity of NSP is an important symbol of service capability of the navigation system. The NSP concept was introduced firstly,and then algorithms of the availability and continuity of NSP were researched,based on these,model architecture of the NSP was proposed and the NSP simulation analysis system was designed and implemented,finally,the simulated experiment of the grid with 10 resolution was implemented and the system architecture and the plug-in facility were testified.     

基于问题框架的武器装备体系需求建模研究

简要分析了国内外武器装备体系需求研究的现状,总结了武器装备体系需求特点,采用问题框架的需求工程方法,建立了武器装备体系需求的问题框架模型,给出了武器装备体系的需求建模方法,为构建我军一体化联合作战的武器装备体系做出了探索性的研究。     

一般系统方法论研究

在分析Ｃｈｅｃｋｌａｎｄ软系统方法论的局限性的基础上，本文提出了一般系统方法论（ＧＳＭ）．ＧＳＭ包括了软系统方法论与Ｈａｌｌ硬系统方法论的全部内容，井扩展到问题的发现与形成阶段，揭示出这三部分之间的逻辑联系，从而完善了系统问题从感知到解决的全部可能的逻辑思维过程．     

研究制造系统是提高制造业水平的关键

从分析企业亏损、效益不高开始, 提出研究制造系统课题, 同时分析了国有企业弊端和改革方向, 并进一步讨论了新学科的研究目的、内容和方法。     

系统生物学:面向系统的生物学研究

论文介绍了什么是系统生物学、系统生物学的简史、系统生物学的结构、内容、研究方法以及药物开发应用的前景.生物学研究正从分子生物学走向系统生物学,由精细的分解研究转向系统的整体研究.系统生物学研究整合各种生物信息的实验数据、建立数学模型,并通过实验验证、完善模型,最终预测生物的系统的行为.     

武器装备体系能力需求论证及探索性仿真分析实验

信息化战争条件下对武器装备体系的研究需要系统理论的指导,需要工程化实验手段的支持.针对信息化战争条件下一体化联合作战的新需求,研究了武器装备体系能力需求论证的问题,提出了一种新型的探索性仿真分析方法,并讨论了武器装备体系分析仿真实验的有关问题.     

Occupational Health and Safety Systems,Corporate Governance and Viable Systems Diagnosis: An Action Research Approach

This paper establishes a theoretical basis for the implementation of governance systems in Occupational Health and Safety (OHS). This arose when a complex government organization reviewed the usage of its OHS computer system. This review precipitated several cycles of Action Research (AR). The AR allowed the recognition that the organization needed to define its OHS strategy, clarify its commitment to OHS, and examine its OHS systems in order to provide an effective OHS management and corporate governance system. As part of the review, a Viable Systems Diagnosis was done on the OHS function. It was recognized that Stafford Beer provided valuable insights into the information needs and communication flows of OHS information throughout this complex organization. Action research appears to be a particularly useful method for examining and implementing OHS management systems.     

Soft Systems Methodology and Systems Maintenance

Business systems maintenance represents a large proportion of the work of IT staff in most organizations. Many methodologies relevant to IT concentrate on systems development and give little attention to systems maintenance. In this paper we discuss the relevance and benefits of the Soft Systems Methodology (SSM) to systems maintenance. Payroll administration is then used to provide an outline illustration of the use of SSM for systems maintenance projects. Aspects of the use of SSM for systems maintenance projects are also discussed.     

系统生物学:系统科学与生物体系统

对近年涌现出来的生物体系统研究新思路———系统生物学进行了概述,简要叙述了系统生物学出现的背景、研究内容和研究方法,以及与生物体系统其他研究方法之间的联系与区别,并提出了对系统生物学进一步研究的意见.     

Systems Language for e-Democracy: Personal Resource Systems Management (PRSM), a Model and Action Research

In ancient Athens, the Agora was a place for collective decision making about personal and community issues. New Agoras, most recently Internet-enabled ones, now propose to enliven participatory democracy and establish systems by which our institutions can serve us and we can govern ourselves (B. H. Banathy, Guided Evolution of Society: A Systems View, Kluwer Academic/Plenum Press, New York, 2000). Effective participation in such activity will require a language and consciousness not currently in evidence, and learning beyond current parameters. In this article, high school students from Stephanie Williams' Child Development classes at McDowell High School, Millcreek Township School District, demonstrate use of a new paradigm. This model of Personal Resource Systems Management provides systems language for Agora discourse enabling effective participatory democracy.     

支持武器装备体系论证的探索性分析框架研究

武器装备体系论证评估属于宏观层次的决策分析问题,需要考虑复杂多变的环境和大量不确定因素的影响.探索性分析方法是一种将多种知识和方法结合起来的敏捷分析方法,针对武器装备宏观论证中面临的大量不确定性问题,提出了探索性分析框架.该框架从各种知识获取开始,包括探索性分析建模（以基于扩展影响图的分析建模和主动元建模为关键技术）,不确定性处理方法和实验分析方法,最终支持鲁棒决策,并且该框架在空军战役探索性分析中得到了初步应用.