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.     

基于SOA的分布并行SMP2仿真体系结构研究

为了提高SMP2模型在分布式环境下的互操作与可组合性,提出了基于模型驱动架构的分布并行SMP2仿真体系结构。针对分布式环境模型组合的特点,提出了基于代理的SMP2仿真模型分布式组合方法。针对在分布式环境下进行模型调度的两个问题,提出了基于时间管理器和消息管理器的仿真模型分布式并行调度方法。设计实现了原型系统,包括基于空消息的异步仿真协议时间管理器、基于WebService的消息管理器、仿真控制管理器和仿真应用客户端。最后并以导航系统DOP分析仿真为例,验证了方法的可行性,并讨论了下一步研究方向。

Abstract：

To enhance the interoperability and composability of the Simulation Model Portability Standard 2 （SMP2） in distributed environment, a simulation architecture based on Service-Oreinted Architecture （SOA） was promoted. To satisfy the composition and schedule requirment under destributed environment, a proxy-based model composition method and a model schedule method based on time manager and message manager were studied. A prototype system was designed and implemented, including CMB-based time manager, web-service-based message manager, simulation control manager and simulation client. Finally, an application of Navigation System DOP analysis simulation demonstrates the validity and feasibility of the method.     

基于HLA的潜艇作战仿真平台设计与实现

建立了集潜艇装备仿真、反潜CGF仿真、武器对抗仿真、海洋环境仿真为一体的潜艇作战模型体系,采用HLA仿真体系结构构建了完整的潜艇作战分布式仿真平台,系统提供有效的仿真数据收集、存储及分析功能,可以在＂虚拟战场环境＂中开展对抗条件下的潜艇作战效能评估、作战使用方法研究等工作,系统通过扩展接口可与其他非HLA仿真系统互连从而扩展了研究范围。

Abstract：

A comprehensive simulation model framework was established,which included equipment models,anti-submarine forces model,weapon counterwork model,ocean environment model. A HLA-based distributed simulation system for submarine warfare was built to form a virtual ocean combat space,in which research works could be carried out by the means of counterwork simulation. This system provides the functions of simulation data collect,access and analysis,also this system can interlink with other non HLA systems through extension interface.     

基于多节点多核的样本级并行仿真技术研究

针对蒙特卡罗仿真的特点,开展了基于多节点多核环境的样本级并行仿真技术研究,设计实现了基于客户端/服务器架构的系统原型,给出了并行仿真实验流程。案例简析表明,该技术能够很好的利用局域网环境下普通PC计算节点以及集群计算服务器各计算刀片上多核处理器的计算能力,大为减少多样本闭环仿真运行时间,提高装备论证效率。

Abstract：

For the characters of Monte Carlo simulation, the research on sample-level parallel simulation based upon multi-node multi-core environment was carried out. The C/S based system prototype was designed and implemented. The experimental process was also given. Case analysis shows that this technology can make use of the multi-core CPUs’ computing power of both normal PC nodes and blades of the cluster server and greatly reduce the simulation time, thus improve the efficiency of equipment demonstration.     

基于Agent的Web网信息传播仿真模型

web网上的信息传播是社会复杂网络与信息复杂网络相互作用的结果。分析了web网和网民社会关系的结构特征,定义了信息价值时变函数,将网民基本行为归纳为读、写、评、传四类。基于多Agent建模方法建立web网信息传播仿真模型,用BA算法生成虚拟信息环境,采用WS模型刻画虚拟社会关系;定义了网民Agent的属性和行为规则,以及网民和网站的交互规则。设计了相关算法,实现了仿真模型,仿真结果表明该模型能够较好地模拟常态下的网络信息传播规律。

Abstract：

Information diffusion on the worldwide web results from the interactions between social network and information network.The structural characteristic of Worldwide Web and users＇ social network was analyzed,the time-dependent function of information value was defined,and users＇ basic behavior was classified into read,write,review and propagate.An agent-based model of information diffusion on the web was built,the virtual information environment was generated by BA algorithm,and the virtual social network was depicted with WS algorithm.The property of agents,the behavior rules of users,and the interaction rules between user and web site were described.All the related algorithms were designed and the simulation model was implemented.The results show that some information diffusion rules in normal situation can be reproduced.     

基于作战单元的装备综合保障仿真评估研究

针对装备综合保障仿真评估中的三个方面的问题,提出了基于装备作战单元的建模方法,说明了针对装备作战单元建立综合保障仿真评估Petri网模型的方法,并给出了两个具体的仿真流程,说明了具体系统实现的方法。最后,以某装备作战单元为例,将获取的该装备的实际保障工作相关数据,按照所建立的仿真模型的输入要求输入仿真模型,根据模型输出数据,对仿真结果进行分析评估。

Abstract：

According to the three problems in simulation of ILS evaluation, the means of modeling, the method of building Petri net model of ILS simulation to the equipment basic combat unit, and the method of building the system were put forward. Taking an equipment as an example, input the actual support data to the simulation model constructed, and then the simulation result was analyzed. It proves that the model is correct and feasible.     

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.     

基于BOM的STSS系统仿真设计与实现

以空间跟踪与监视系统（Space Tracking and Surveillance System,STSS）为仿真对象,基于高层体系结构（High Level Architecture,HLA）分布式仿真技术设计、开发STSS仿真系统。分析了STSS技术特点及仿真需求,按照基本对象模型（Base Object Model,BOM）开发标准构建系统的层次化联邦架构,提高了系统开发效率和模型的可重用性。通过对不同场景的多次仿真,初步验证了STSS的性能指标,说明该系统具有良好的适应性。

Abstract：

Based on HLA distributed simulation technology, design and implementation of STSS simulation system, the technical traits of STSS system and demands of simulation were analyzed. According to BOM development standard, a framework in hierarchy of STSS simulation system was constructed, which has effectively improved the efficiency of system realization and the capability of model reuse. By simulating the different scenarios repeatedly, the performance parameter of the STSS simulation system was tentatively verified, and applicability of the simulation system was proved.     

卫星二次分离方案仿真研究

首先借助Adams软件对多星二次分离方案建立简化的分离系统模型,研究卫星质量,子星分布特性,分离参数等因素对小卫星二次分离的影响,并选择合理参数值对多星二次分离过程仿真。然后,为验证模型,对二次分离进行了动力学计算,得到子星分离速度和角速度值。对比两者结果一致,验证了ADAMS模型计算的正确性。仿真研究对小卫星设计具有重要实际意义,为我国新一代小卫星的多级分离技术的研究提供依据和参考。

Abstract：

Firstly,the simplified model of satellite separation system was built for secondary separation schemes,and the elements of affecting micro-satellite secondary separation were analyzed,such as micro-satellite mass,distributing character and separation parameters,and then ADAMS simulation was applied to the multi-satellites secondary separation based on the optimized parameters. After that,in order to verify model,the dynamic calculating was carried out and velocity and angle velocity of secondary separation were obtained. Finally,it could be concluded that the Adams model was correct comparing dynamics results. The results are a good reference to satellite design and step separate technology of new generation satellite.     

生物组织内置源的电磁波能量吸收模型及仿真试验

生物组织电磁能量吸收的研究多集中在外置辐射源的远场.利用比吸收率和电磁场之间的关系可以研究生物组织对内置源的电磁波能量的吸收情况.建立了内置电磁波能量吸收的数学模型,并根据模型进行了仿真试验.仿真试验的结果表明:生物组织对电磁能量的吸收随电磁波频率和组织材料电导率的增大而增大,当频率大于1GHz时,能量吸收急剧增大,而且能量吸收主要发生在辐射源的近场区域内.能量吸收也与组织厚度存在正比关系,但这种影响相比于频率的影响显得非常微弱.建模和仿真的结果可用于体内微系统的无线通信模块设计.     

铜基复合型四极轨道电磁特性仿真分析

四轨电磁发射器在工作过程中, 电流集中引起的热效应会影响发射精度和轨道寿命。为缓解大电流带来的轨道热损伤及机械磨损问题, 提出铜基复合型四轨电磁发射器模型并对其电磁特性进行了研究。采用有限元方法, 对复合型和普通型四轨电磁发射器的电流密度和磁场分布进行了仿真对比; 分析了复合层参数对电流密度、磁场强度和电枢受力三方面的影响。仿真结果表明，复合型四轨电磁发射器能够降低电枢和轨道接触面的电流密度, 改善接触面的电流分布状况; 复合型四轨电磁发射器在特定位置处具有更大的磁场屏蔽范围, 能为智能弹药提供良好的磁场环境; 电流密度、磁场强度和电枢推力均随着铜-钢厚度比的增加而增大。     

分布式交互仿真中的电波传播模型研究

针对分布式交互仿真中电波传播的建模与表现方法进行了研究.针对电波传播环境的复杂性,采用了一种将经验模型、半确定半经验模型和确定模型相结合的电波传播模型,并给出了复杂电波传播环境下相关环境信息数据的表达方法.在小区制非可视传播环境中,加速改进了基于SBR的射线跟踪算法,给出了相关的实验,并验证了其有效性.     

基于有限元法的开关变换电路的近场特性分析

为进一步明确电力电子开关变换电路工作时的近场特性，尝试采用基于有限元方法的ANSYS软件以BUCK电路为例进街。了分析，首先采用场路锅合的方法得到与已有结果相符的电感线圈电流波形，在此基础上对采用不同布局的BUCK电路实体原型建立了有限元模型，并对其进行了3D电磁场分析，得到了清晰的电磁场分布及其变化规律。通过分析为电力电子电路的电磁兼容设计提供了依据和新的思路。     

体外电磁驱动的膀胱动力泵的建模与仿真

针对神经源性膀胱的辅助排尿问题,基于膀胱的结构和储排尿机制,提出了一种体外电磁驱动的膀胱动力泵。为了研究其排尿动力特性,运用电磁学理论,建立了该泵的电磁驱动单元数学模型,并进行了合理简化。在此基础上,建立了描述膀胱压和尿流率与电磁铁电流、气隙宽度及永磁体体积和数量等影响因素之间关系的数学模型。仿真和试验分析结果表明,膀胱压和尿流率与电磁铁电流成近似线性关系,调节电磁铁电流可调控膀胱压和尿流率。所建立的数学模型简单有效、使用方便,可为膀胱动力泵的特性分析和结构设计提供理论依据。

Abstract：

To solve the problem of assisting a neurogenic bladder micturating,a bladder power pump driven by an external electromagnet was proposed,according to the structure and micturating mechanism of human bladder.To investigate the micturition performance of the pump,the mathematic model of the electromagnetic drive in the pump was built using the theory of electromagnetics,and simplified reasonably.Based on the simplified model,the mathematic models that express the relations between the intravesical pressure and urine flow rate and the influence factors such as electromagnet current,air gap,permanent magnet volume and number,were also established.The simulation and experimental results show that the intravesical pressure and the urine flow rate are approximately proportional to the electromagnet current respectively and can be regulated by adjusting the electromagnet current.The established mathematic models are simple and practicable,which provide the theoretical basis for the performance analysis and structure design of the pump.     

新型驱护舰作战系统仿真设计与实现

仿真训练对于促进新装备战斗力的快速形成具有重要作用。针对新型驱护舰作战模拟训练的迫切需求,通过对仿真系统进行需求分析和概念建模,采用"通用加专用"的设计思想,解决了多型舰作战系统仿真兼容的问题,并设计了新型驱护舰作战系统仿真体系结构。分析了仿真系统的组成和功能,重点阐述了复杂电磁环境仿真、故障模拟等关键技术。系统实现了多型驱护舰的单舰和编队作战模拟训练,已在部队安装,训练效果良好。     

卫星通信链路连通性仿真模型设计

通信卫星在信息传输尤其是军事信息的传输中的作用日益突出。卫星通信链路的连通性分析与仿真是空间信息系统仿真中的主要内容之一，它包括物理可见性和电磁波的传输特性的分析与仿真。论文分析了航天器的空间位置计算模型，建立了通信卫星与航天器之间的物理可见性模型．通信卫星与地面节点之间的物理可见性模型以及空间电磁波的基本传输模型，并在计算机上进行了仿真实现，将仿真结果与STK计算的数据进行了对比，结果表明了模型具有较高的置信度。模型具有可移植性、扩展性、精确度高和简洁易用的特点。     

瞬态电磁波对多层电缆耦合的数值分析

为了更好的解决电磁兼容的问题,根据电磁场理论对以往提出的瞬态电磁波对电缆耦合效应的模型进行了改进。将一种多层阻抗计算模型应用到单层电缆的计算方法中,对空中和地下的不同层数屏蔽电缆的表皮感应电流、内部感应电压和电流分别进行了分析和计算,并对两种不同结构电缆的内部感应电压进行了比较。仿真结果表明:采用多层电缆可以减少电磁波对电缆内部的耦合,为电磁兼容的预测和设计提供了一种较好的方法。     

军用电站雷电过电压电磁暂态仿真研究

针对军用电站雷电过电压电磁暂态模型复杂度高和计算误差大的问题,以典型军用电站为研究对象,提出了军用电站电力电子设备离散-连续分离建模方法,建立了电缆、控制箱等雷电防护关键部件的电磁暂态模型,并采用插值算法对开关的暂态等值电路模型进行修正,提高了开关动作时刻仿真模型的准确性。基于PSCAD/EMTDC软件构建了军用电站雷电过电压电磁暂态仿真系统,通过大量的仿真试验,获取了接地电阻、浪涌保护器等对军用电站耐雷水平的影响规律,基于此开发的模块化军用电站雷电过电压防护装置可阻塞沿不同电能制式、电压强度的电源/数据/信号线引入的雷电过电压,进一步验证了仿真模型的正确性。     

三维空间中凸多刚体实时运动仿真

将计算机科学与理论力学相结合,介绍了多刚体运动仿真的步骤和方法。首先论述了单个及多个刚体的运动仿真步骤以及应用叠加原理计算合力及合力矩的方法。然后,针对刚体运动中的不同碰撞响应类型:碰撞接触与临时接触,分别建立不同的碰撞响应力学模型,前者运用恢复系数理论和动量、动量矩定理建立响应模型,后者通过分析刚体的受力和运动状态建立相应的动力学模型。最后,讨论了该方法的局限性以及适用的范围。