多Agent仿真的装备维修保障效能评估系统设计与实现

采用基于多Agent仿真的方法,对战时装备维修保障效能评估系统结构、功能和流程进行了设计,并在此基础上,以Swarm为平台,建立了战时装备维修保障效能评估原型系统,初步实现了装备维修保障仿真评估。实践证明,采用基于多Agent的方法进行战时装备维修保障效能评估研究是一种可行、有效的方法。     

军用软件需求分析研究

需求分析是军用软件开发中重要的环节,也是项目成功的基础。在深入探讨军用软件需求分析现状和存在问题的基础上,详细阐述了做好军用软件需求分析的一些基本思路和方法。     

A robust queueing network analyzer based on indices of dispersion

We develop a robust queueing network analyzer algorithm to approximate the steady-state performance of a single-class open queueing network of single-server queues with Markovian routing. The algorithm allows nonrenewal external arrival processes, general service-time distributions and customer feedback. The algorithm is based on a decomposition approximation, where each flow is partially characterized by its rate and a continuous function that measures the stochastic variability over time. This function is a scaled version of the variance-time curve, called the index of dispersion for counts (IDC). The required IDC functions for the external arrival processes can be calculated from the model primitives or estimated from data. Approximations for the IDC functions of the internal flows are calculated by solving a set of linear equations. The theoretical basis is provided by heavy-traffic limits for the flows established in our previous papers. A robust queueing technique is used to generate approximations of the mean steady-state performance at each queue from the IDC of the total arrival flow and the service specification at that queue. The algorithm's effectiveness is supported by extensive simulation studies.     

零彗差自由点条件下的失调光学系统波像差特性分析

基于矢量像差理论,对反射式光学系统的一类特殊失调状态——满足零彗差自由点条件展开研究,分析了该特殊失调下三阶彗差和三阶像散的全视场波像差特性,建立了三阶像散双节点位置的解析计算公式,研究发现该类失调不会引入三阶彗差,并且会导致三阶像散的一个节点位于中心视场附近,揭示了当前传统装调方法中仅采用轴上彗差为零作为系统完善装调的弊端,并基于像差特性分析提出了一种仅根据轴上视场引入定量失调误差前后的像差变化来评估系统完善装调的方法。利用CODE V(Version 10.2)对两反式光学系统进行了仿真分析,结果表明文中建立的模型和方法可定量分析三阶像散双节点的位置及该类失调对系统波像差的影响规律,并验证了所提出系统完善装调方法的有效性。     

Dual-steering mode based on direct yaw moment control for multi-wheel hub motor driven vehicles:Theoretical design and experimental assessment

One of the main challenges for multi-wheel hub motor driven vehicles is the coordination of individual drivetrains to improve mobility and stability in the steering process.This paper proposes a dual-steering mode based on direct yaw moment control for enhancing vehicle steering ability in complex environ-ments.The control system is designed as a hierarchical structure,with a yaw moment decision layer and a driving force distribution layer.In the higher-level layer,the objective optimization function is con-structed to obtain the slip steering ratio,which represents the degree of vehicle slip steering in the dual-steering mode.A yaw moment controller using active disturbance rejection control theory is designed for continuous yaw rate control.When the actual yaw rate of the vehicle deviates from the reference yaw rate obtained by the vehicle reference model and the slip steering ratio,the yaw moment controller is actuated to determine the yaw moment demand for vehicle steering.In the lower-level layer,there is a torque distribution controller based on distribution rules,which meets the requirement of yaw moment demand without affecting the total longitudinal driving force of the vehicle.For verifying the validity and feasibility of the dual-steering mode,simulations were conducted on the hardware-in-loop real-time simulation platform.Additionally,corresponding real vehicle tests were carried out on an eight-wheel prototype vehicle.Test results were generally consistent with the simulation results,thereby demon-strating that the proposed dual-steering mode reduces steering radius and enhances the steering per-formance of the vehicle.     

基于波束域MUSIC方法的高分辨方位估计

现代声纳系统普遍采用水听器基阵和一定的信号处理来提高对目标的检测和定位能力,而基阵的波束形成则在其中起着核心作用。文中研究了窄带波束域高分辨方位估计技术,分析了波束域MUSIC方位估计的构造过程和具体实现方法。仿真计算表明,基于波束域MUSIC的方位估计算法是一种分辨空间小角域内多个目标的有效方法。     

盲信道均衡的动量恒模算法

介绍了盲信道均衡恒模算法(CMA)的基本原理,对恒模算法的缺点进行了分析,通过修正恒模算法的迭代公式提出一种动量恒模算法(MCMA)。利用QPSK信号,采用计算机仿真的方法对动量恒模算法与恒模算法进行盲均衡性能比较,模拟结果显示,MCMA算法比CMA算法在收敛速率、降低稳态均方误差和符号间干扰具有明显的优势,有效地改进了信道均衡性能。     

武器装备战斗损伤研究

以“通用武器雷达装备战损规律研究”成果为基础,系统阐述了开展武器装备战斗损伤研究的方法体系,介绍了战斗损伤建模与仿真、装备战斗损伤机理研究、装备战斗损伤分析、战斗损伤试验的相关技术和方法。     

高机动性能导弹大迎角测量方法研究

简要介绍了嵌入式大气数据传感系统的概念及技术。针对高速高机动性能导弹大迎角高马赫飞行的特点,提出应用嵌入式大气数据传感技术解决导弹大迎角测量问题,并结合导弹自身特点,给出了迎角测量原理和方法,这对于新型导弹的设计具有一定的借鉴意义。     

合成孔径雷达的主要发展方向

首先简要介绍了合成孔径雷达(SAR)产生和发展的历程,其次对当前合成孔径雷达研究的一些主要的热点和发展方向:多参数SAR、干涉SAR、超宽带SAR、激光SAR,尤其是小型化SAR进行了适当的归纳和分析,并且相应地给出了部分具有代表性的SAR系统主要的参数,对合成孔径雷达的研究工作具有一定的理论参考价值。