装甲装备月份维修计划优化制订方法研究

分析装甲装备月份维修计划的制订目前存在的问题,通过研究任务与装甲装备月份维修计划之间的相关关系,提出了根据任务的强度确定维修时机为优化目标的维修计划优化模型,统筹考虑维修资源、规章制度等因素。经LINGO软件仿真验证,结果显示该模型能够极大化装备的使用效益,实现科学化、精确化的送修,以及对装备的集约化管理。

Abstract：

The problems were analyzed that lay in the formulation of the armored equipment month maintenance plan. Based on researches about the relationship between the mission and the month maintenance plan, a maintenance plan optimization formulation model was brought forward. The model took factors such as maintenance resources, rules and regulations into overall consideration, and selected maintenance opportunity based on the strength of the mission as optimization goal. The model was validated by LINGO simulation. The result shows that the model can not only maximize the use efficiency, but also realize the scientific and precise delivery and the intensive management of the equipment which needs preventive maintenance.     

Health management based on fusion prognostics for avionics systems

Health management permits the reliability of a system and plays a increasingly important role for achieving efficient system-level maintenance.It has been used for remaining useful life(RUL) prognostics of electronics-rich system including avionics.Prognostics and health management(PHM) have become highly desirable to provide avionics with system level health management.This paper presents a health management and fusion prognostic model for avionics system,combining three baseline prognostic approaches that are model-based,data-driven and knowledge-based approaches,and integrates merits as well as eliminates some limitations of each single approach to achieve fusion prognostics and improved prognostic performance of RUL estimation.A fusion model built upon an optimal linear combination forecast model is then utilized to fuse single prognostic algorithm representing the three baseline approaches correspondingly,and the presented case study shows that the fusion prognostics can provide RUL estimation more accurate and more robust than either algorithm alone.     

新型压电式气动PWM数字比例阀建模及仿真研究

针对采用电磁铁为电-机械转换器的传统气动PWM比例阀存在着响应时间慢,稳态精度差等缺点,提出了一种以压电叠堆为电-机械转换器的新型压电式气动PWM数字比例阀,建立了其数学模型,并利用Matlab/Simulink建立其仿真模型;通过仿真及试验结果的对比,证明了所建数学模型是准确的。仿真研究了先导阀芯输出位移、PWM载波频率及PID控制等对阀性能的影响,为今后进一步优化结构参数及控制参数的选择提供了依据。

Abstract：

The traditional electro-pneumatic PWM proportional valve driven by electro-mechanical converter of electromagnet has the disadvantages of slow response and poor control precision etc.To solve this problem,a novel piezoelectric type pneumatic PWM digital proportional valve driven by the electro-mechanical converter of piezoelectric stack was proposed.The mathematics model of PWM proportional valve was set up and its simulation model was built by means of Matlab/Simulink.By the comparison of simulation and experiment results,the built mathematical model was proved to be accurate.Moreover,the effect of pilot valve core displacement,PWM carrier frequency and PID control to the PWM valve performance was researched by simulation,which will provide theoretical steering to further optimize the valve structure parameters and the choice of control parameters.     

舰载相控阵雷达仿真系统研究与实现

对于舰载相控阵雷达这类复杂系统的仿真,软件系统的设计起着至关重要的作用。为了更有效的进行舰载相控阵雷达的仿真研究,在模块化的基础上,引入了分层设计的思想,建立了分层模块化、易于扩展的仿真软件体系结构,给出了总仿真流程,并着重分析研究了其核心模块的功能、原理和实现流程,构建了仿真软件系统。仿真结果充分验证了模型和方法的可行性和有效性。

Abstract：

The design of software system is very important to the simulation of complex system such as shipborne phased array radar. To make the research of shipborne phased array radar simulation more efficiency, the idea of layered design was imported based on modularization, a hierarchy modularized and easy expansible simulation software architecture was established, and the whole simulation flow was suggested, the function and the theory and the realization flow of the core model was mainly researched, and the simulation software system was developed. The result of the simulation has validated the model and the method.     

分布式库存系统策略探讨与仿真

如何解决供需不平衡,实现供应链中成本与服务水平的协调控制是研究的一个重要问题,分布式库存系统的实施关键在于决策持有多少库存以及需求到达时库存缺乏如何处理。以具有自主决策权的几个零售商为对象,研究其库存转移状况,以及成本与服务水平,通过建立库存调拨模型,提出了三种调拨策略,包括自私型调拨策略,合作型调拨策略,混合型调拨策略,并根据这三种策略运用Anylogic软件进行仿真,分析比较三种策略的有效性,以得到最优结果。

Abstract：

The key point of the study is how to solve the imbalance of supply and demand, and how to coordinate the cost and service level in the supply chain. To solve the key problems in implementing the multi-location inventory system which lie in deciding how many items to hold at each retailer and how to deal with if there is a demand for an item at a retailer that has none of them in stock. A few independent decision-making retailers are the main research objects. It was targeted to study the transfer of their inventory status, as well as the costs and service levels, and through the establishment of inventory transshipment model, three transshipment strategies, including self-based strategy, cooperation-based strategy, hybrid strategy, were suggested. Then the software of Anylogic was adopted to simulate, analyze and compare the effectiveness of the three strategies in order to obtain optimal results.     

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.     

基于Dymola的液压系统热力学模块化建模与仿真

以模块化建模方法为指导,提出了液压系统的热力学模块化建模方法。将液压元件工作机理分为容积型和阻尼型,建立容积型模块和阻尼型模块模型,由容积型模块和阻尼型模块单独或组合建立液压元件的模块化模型。采用Dymola对所建立的各元件模型进行仿真实现,建立了温度仿真模块库-ThermalHydraulic,可以实现面向液压原理图的可视化温度仿真。对模块库进行测试,验证了建模和仿真实现的可行性。

Abstract：

According to the modular modeling method,a thermal-hydraulic modular modeling method of hydraulic system was presented. Basic operating principles of all hydraulic components were divided into two types：volume and resistance. Volume model and resistance model were developed to represent the volume and resistance characteristic of hydraulic component. Component＇s modular model was established by signal or both of volume model and resistance model. Then,the hydraulic system temperature simulation modular library-Thermal Hydraulic was established by Dymola software,and the library could establish system model conveniently by visual modeling style based on hydraulic principle figure. At the last,the system test was made to evaluate the feasibility of modeling and simulation.     

虚拟维修中的虚拟人移动仿真

虚拟维修是近年来提出的一个新概念,并在维修性分析、维修训练等领域得到广泛的应用。为了解决维修过程仿真中的维修人员仿真问题,提出了一个分阶段的虚拟人移动仿真方法,采用随机运动规划方法生成虚拟人躯干及头部的无碰撞路径,利用运动捕获数据和运动变形来实现对四肢运动的仿真。在运动规划中引入了姿态转移图的概念,实现了虚拟人移动过程中多种姿势之间的自然转化。采用基于运动变形的方法消除了虚拟人上肢和环境中其他物体的碰撞现象,提高了仿真真实性。

Abstract：

Virtual maintenance is a new concept introduced in the last few years,and has been broadly used in maintainability analysis and maintenance training.In order to solve the virtual human simulation in maintenance process simulation,a multi-stage virtual human locomotion simulation method was proposed.The free collision path of virtual human torso and head was planned by a probabilistic motion planner.And the motion of arms and legs was simulated using motion captured data and motion warping.A new concept of pose transition graph was introduced in order to implement natural pose transition in locomotion simulation.In motion optimization,a method based on motion warping was proposed to avoid the possible collision between virtual human arms and other objects in the environment.     

基于改进的灰色预测的模糊神经网络控制

采用等维新信息和提高原始数据列光滑度的方法对灰色预测模型进行改进,具有预测更准确的效果,结合采用模糊神经网络控制的精确稳定性特点,提出一种改进的灰色预测的孵化模糊神经网络控制算法,将其应用在具有大滞后、强干扰的孵化过程中。仿真和实际结果表明,提出的控制策略能够有效克服时滞过程的超调问题,具有较强的鲁棒性和自适应性。

Abstract：

Grey Predictive model was improved by using ＂moving window＂ and increasing the smoothness of original data,which can predict accurately,by combining grey predictive model with fuzzy neural network control algorithm which is accurate and stable.A fuzzy neural network control algorithm based on improved grey predictive model was proposed to be applied in incubation process which is lag largely and strongly disturbed.Simulation and running results show that the proposed control strategy can effectively overcome the overshoot caused by delay and has better flexibility and robustness.     

基于虚拟集成技术的ESP硬件在环仿真

针对汽车电子稳定性控制系统的开发,提出了集成ADAMS/Car的整车虚拟样机、MATLAB/Simulink的虚拟控制器和LabVIEW的测控平台的汽车电子稳定性控制的硬件在环仿真方法（VCHIL）,阐述了该方法的实现原理,讨论了基于虚拟集成技术的硬件在环仿真系统的组成及其相互关系,并以此为向导,研制了汽车电子稳定程序（ESP）的硬件在环仿真实验平台,并进行了实验验证。

Abstract：

Aiming at the development of ESP system,hardware-in-loop simulation method based on virtual cross technology （VCHIL）,which combined virtual modal by ADAMS/CAR,virtual controller by MATLAB/Simulink and LabVIEW platform,was addressed.The realization principle of the method was introduced.The structure and relation between parts of hardware-in-loop simulation system based on virtual cross technology were discussed,and according to these,the hardware-in-loop simulation testing platform was developed.Test on this platform was performed and the results were analyzed and compared.     

机电设备维修备件的柔性采购机制与柔性价值

针对传统机电设备刚性备件采购合同存在的一些难以解决的问题, 如备件需求的不确定性高、缺货损失大的问题, 在备件分类管理的基础上, 提出了基于实物期权的柔性采购方法, 以需求符合几何布朗运动为基本假设, 建立了设备备件采购模型, 并运用二叉树模型法确定了采购机制的柔性价值.应用实例探讨了模型中需求变化、备件价格增长率、附加成本、单位储存成本的敏感性, 验证了此采购机制可有效降低采购商的采购成本, 获得较大的柔性价值.     

一种备件多级库存系统的仿真优化模型

针对备件多级库存问题，分析了备件需求的特点，建立了多级库存问题模型．在模型的基础上对备件订购量、安全库存量，订购策略，率存模式等进行了研究．研究发现：库存模式、订购策略和相关参数都会影响库存策略和最小总费用；一般情况下，较优订购策略为“库存量降到安全库存水平以下时订购，订购使得备件总量达到某一常数”．因此，备件采用多级库存模式还是单极库存模式应根据具体参数和订购策略确定．由于备件库存问题的特殊性，论文提出了一种求解该问题的仿真优化方法．实验结果表明：是一种有效的求解备件库存优化问题的方法。     

K:N系统可修复备件两级供应保障优化研究

备件供应保障优化是提高武器装备的战备完好性和降低寿命周期费用的重要途径。通过分析复杂装备可修复备件两级供应保障系统,研究了备件保障与装备战备完好性的关系,建立了以备件购置费用为约束、系统供应可用度最大为目标的冗余度系统可修复备件供应保障优化模型,并运用边际效能法进行求解。实例应用证明,模型可以优化备件库存以及评估备件库存量、两级维修能力、系统自身可靠性等因素对系统保障效能的影响。     

装备视情维修与备件库存联合优化决策

研究周期检测条件下装备视情维修与备件库存的联合优化问题。针对相同多部件系统,根据系统的退化状态和备件库存状态确定维修需求,建立了以系统检测周期、预防维修阈值和备件安全库存阈值为决策变量,以平均费用率最低为目标的联合维修决策模型。在模型求解过程中,利用退化状态空间划分法分析各决策点的维修需求,在系统的联合概率密度求解的基础上,确定维修组合概率和备件库存状态概率。最后,通过末制导雷达某部件系统的实例计算,验证了优化方法的有效性,另外还通过灵敏度分析,探讨了相关参数对模型的影响。     

地空导弹武器系统抢修备件配置建模与仿真

分别就地空导弹武器系统非战斗损伤和战斗损伤引起的战时抢修备件消耗进行分析, 建立基于可用度的非战斗损伤抢修备件需求量模型, 进而建立战时抢修备件的需求量模型,并 对模型加以验证.利用Monte-Carlo算法对模型进行仿真分析和计算, 得到地空导弹武器系统的抢修备件清单. 模型和仿真结果具有一定的理论意义与实际价值.     

串联系统备件满足率分配及配置优化

备件作为装备维修保障的重要物质资源,装备研制单位需要将使用方提出的备件满足率要求进行合理分配,为合理制定备件配置方案提供输入,已成为目前装备研制阶段急需解决的重要问题之一.针对备件满足率只有统计定义的问题,论文研究了单备件满足率和串联系统备件满足率的概率性质,给出了其概率模型,揭示了备件满足率的内涵和工程意义.在此基础之上,以串联系统备件满足率的概率模型为基础,研究了系统备件满足率的两种分配方法,即线性代数分配模型和以备件总重量最小为目标的备件配置优化模型,为合理制定串联系统备件保障方案提供了理论依据.     

民用飞机多地域航材支援网络模型研究

航材支援保障对于民用飞机安全可靠营运至关重要, 民用飞机运营在不同地区, 以客户需求为牵引的航材支援同时受到地域环境和运输方式的影响。为了实现民用飞机航材敏捷支持, 本文综合考虑多因素的影响, 提出了航材支援网络节点权衡的嵌套层次分析法(nested analytic hierarchy process, NAHP), 以及基于遗传算法(genetic algorithm, GA)的民用飞机多地域航材支援网络模型。结合民用飞机多地域运营特点, 对航材支援网络影响因素进行研究, 并运用NAHP对航材支援网络节点进行权衡分析, 对备选节点的重要性进行排序以得到航材支援网络目标节点, 从而构建以时效性为优化目标的多地域航材支援网络节点类型定位与多式联运路径优化模型, 并进行GA适用性设计以对模型求解。最后, 通过与人工规划航材支援方案对比, 对所提方法和模型的有效性进行验证。结果表明,所提方法能够合理确定航材支援网络节点的类型和辐射范围, 同时以最短时间完成航材支援任务, 可为民用飞机在多地域运营的航材支援网络搭建提供可行的方法和思路。     

空间和费用约束条件下的随船备件配置优化方法

通过分析舰艇海上器材保障模式,依据装备的层次分解结构、舰艇的备件更换修理能力,在根据备件的故障率确定备件需求的基础上,以系统的备件不短缺概率为优化目标,考虑备件总经费和仓库空间的约束,建立了基于边际分析法的备件配置优化模型。实例优化结果显示,携带舰艇车间可更换单元,在相同的备件存储空间和体积约束下,可以显著提高舰艇装备的战备完好性。     

考虑关键性的多约束下辐射干扰对消装备随舰备件配置优化方法

可用度是评估备件对装备完好性影响的重要指标,针对备件关键性对装备可用性造成影响而又难以将其考虑在内建立可用度模型的问题,以舰载通信电台辐射干扰对消装备为对象,采用对备件关键性实行专家打分的方法,将备件关键性作为备件配置优化的约束之一,建立以备件费用、备件体积、备件关键性为约束的备件配置优化模型。在备件费用、体积及关键性归一化的基础上,采用权重因子方法将多约束转化为单一约束,并给出了权重因子更新方法。列举案例,分别计算了费用约束、体积约束、关键性约束和多约束下的备件方案,并对比了装备改进前后的备件配置方案,将装备使用过程中的备件保障延伸至装备可靠性设计阶段。案例分析结果表明:备件配置方法在考虑了体积、费用等限制约束下,能同时兼顾备件关键性对装备完好性的影响;装备可靠性设计时,提高装备可靠性低的现场可更换单元(line replaceable unit, LRU)等薄弱点,能有效减少装备维修保障资源。     

可修排队系统备件灰色生灭预测模型

可修部件的失效率和修复率在服役周期内呈现不确定性,基于确定型失效率和修复率建模的生灭过程在解决可修部件备件预测问题时存在一定局限.传统可修备件需求预测模型忽视了排队维修情况下的讨论,这与工程实际不符.以服从一般分布的区间灰数表征可修部件的失效率与修复率,构建了灰色状态转移矩阵,建立了一类排队维修系统的可修部件备件灰色生灭预测模型,研究了该过程的无记忆性和稳态解的存在条件,讨论了失效修复比、修理能力、备件数量与保障率的性质.一定程度上揭示了修理能力受限、失效修复比不确定背景下的可修系统备件需求规律.实际案例验证了模型的有效性和实用性.