PHEV电池电荷状态估计设计及仿真

电池管理系统(battery management system,BMS)是混合动力汽车(parallel hybrid electric vehicle,PHEV)能量管理系统中的核心组成部分,而其中电池电荷状态(state of charge,soc)则是PHEV控制策略中的重要参数.针对PHEV动力电池组SOC系统高度非线性和复杂性的特点,提出了一种基于改进的BP神经网络的HEV动力电池组的实时SOC估计,并对网络的收敛性进行了证明.利用大量PHEV动力电池组在行驶过程中充放电的数据样本,对神经网络进行网络训练并且进行仿真.结果表明,与传统离线SOC估计方法相比,能够有效地减小误差,提高电池SOC的精度.     

火箭悬浮深弹拦截尾流自导鱼雷研究

为了分析了水面舰艇发射火箭悬浮深弹拦截潜射尾流自导鱼雷的作战使用问题,首先,概括了潜射尾流自导鱼雷的攻击原理。其次,介绍了水面舰艇针对尾流自导鱼雷的弹道预测原理以及鱼雷提前角估算数学模型,在此基础上,进一步建立了火箭悬浮深弹拦截鱼雷的射击要素求解模型。最后,进行了仿真检验,归纳了火箭悬浮深弹射击提前角随相关参数变化的分布规律。研究结果对火箭悬浮深弹拦截潜射尾流自导鱼雷的作战使用具有指导意义。     

22 nm全耗尽型绝缘体上硅器件单粒子瞬态效应的敏感区域

基于3D-TCAD模拟,研究了22 nm全耗尽型绝缘体上硅(fully depleted silicon-on-insulator,FDSOI)器件单粒子瞬态(single-event transient,SET)效应的敏感性区域。对比了使用单管和使用反相器来研究器件SET敏感性区域的方法,从而分析实际电路中重离子轰击位置对22 nm FDSOI器件SET敏感性的影响,并从电荷收集机制的角度进行了解释。深入分析发现寄生双极放大效应对重粒子轰击位置敏感是造成器件不同区域SET敏感性不同的原因。而单管漏极接恒压源造成漏极敏感性增强是导致单管与反相器中器件SET敏感区域不同的原因。修正了FDSOI工艺下器件SET敏感性区域的研究方法,与单管相比,采用反相器进行仿真,结果更符合实际情况,这将为器件SET加固提供理论指导。     

Reaction characteristic of PTFE/Al/Cu/Pb composites and application in shaped charge liner

In this paper, the reaction characteristic and its application in shaped charge warhead of a novel reactive material, which introduced copper (Cu) and plumbum (Pb) into traditional polytetrafluoroethylene/aluminum (PTFE/Al), are studied. The thermal analysis and chemical reaction behavior of the PTFE/Al/Cu/Pb mixture are investigated by Differential Scanning Calorimetry (DSC),Thermo-gravimetry (TG), and X-ray Diffraction (XRD) techniques. Then, the shaped charge liners with PTFE/Al/Cu/Pb reactive materials are fabricated, and the X-ray experiments show that they could form reactive jets with excellent performance under the detonation effects of the shaped charge. Based on that, the penetration experiments of shaped charge with PTFE/Al/Cu/Pb reactive liner against steel plates are carried out, and the results demonstrate that the PTFE/Al/Cu/Pb reactive jets could produce a deeper penetration depth compared to the traditional PTFE/Al reactive jets. Meanwhile, the PTFE/Al/Cu/Pb reactive jets also show significant inner-blast effects, leading to dramatically cracking or fragmentation behavior of the penetrated steel plates. This new PTFE/Al/Cu/Pb reactive liner shaped charge presents enhanced penetration behavior for steel targets that incorporates the penetration capability of a high-density and ductility jet, and the chemical energy release of PTFE-matrix reactive materials.     

悬浮式深弹反鱼雷武器系统作战效能试验评估方法

针对悬浮式深弹反鱼雷武器系统的组成及使用特点,提出了对该系统作战效能进行试验评估的基本思路,并依据WSEIAC方法基本原理,构建了定量评估该系统作战效能的基本模型,又通过分析模型中各参数的物理含义及其与系统战术技术指标和使用性能指标间的关系,得出了利用试验鉴定中获取的数据评估系统作战效能的工程化模型。以此为对该武器系统的作战效能进行试验评估探索一种便捷方法。     

双层反应装甲干扰射流影响因素分析

通过对双层反应装甲与射流作用过程进行分析和数值模拟,得到双层反应装甲飞板飞散及与射流作用物理过程,通过模拟结果与物理实验比较可知,数值模拟过程基本正确.同时,利用ANSYS-DYNA针对双层反应装甲不同结构参数与射流作用过程进行数值模拟,分析双层反应装甲两组件距离、与主靶板距离及两组件的夹角对干扰射流的影响,从而为双层反应装甲结构改进及设计优化提供理论参考.     

火箭自导深弹空中段关键指标研究

文中依据火箭自导深弹的组成及攻潜过程,建立了相关仿真模型,在典型条件下,分别采用对目标当前点和对目标提前点两种射击策略,利用蒙特卡罗法仿真分析了弹箭分离高度、入水速度、溅落点散布误差和助飞段平均飞行速度等空中段主要指标对发现概率的影响。仿真结果表明：溅落点散布误差和助飞段平均飞行速度对发现概率影响显著,为火箭自导深弹空中段关键指标;溅落点散布误差控制在200m以内,助飞段平均飞行速度高于250m/s时,具有较高的发现概率。     

Selling to strategic and loss‐averse consumers: Stocking,procurement, and product design policies

Motivated by the presence of loss‐averse decision making behavior in practice, this article considers a supply chain consisting of a firm and strategic consumers who possess an S‐shaped loss‐averse utility function. In the model, consumers decide the purchase timing and the firm chooses the inventory level. We find that the loss‐averse consumers' strategic purchasing behavior is determined by their perceived gain and loss from strategic purchase delay, and the given rationing risk. Thus, the firm that is cognizant of this property tailors its inventory stocking policy based on the consumers' loss‐averse behavior such as their perceived values of gain and loss, and their sensitivity to them. We also demonstrate that the firm's equilibrium inventory stocking policy reflects both the economic logic of the traditional newsvendor inventory model, and the loss‐averse behavior of consumers. The equilibrium order quantity is significantly different from those derived from models that assume that the consumers are risk neutral and homogeneous in their valuations. We show that the firm that ignores strategic consumer's loss‐aversion behavior tends to keep an unnecessarily high inventory level that leads to excessive leftovers. Our numerical experiments further reveal that in some extreme cases the firm that ignores strategic consumer's loss‐aversion behavior generates almost 92% more leftovers than the firm that possesses consumers’ loss‐aversion information and takes it into account when making managerial decisions. To mitigate the consumer's forward‐looking behavior, we propose the adoption of the practice of agile supply chain management, which possesses the following attributes: (i) procuring inventory after observing real‐time demand information, (ii) enhanced design (which maintains the current production mix but improves the product performance to a higher level), and (iii) customized design (which maintains the current performance level but increases the variety of the current production line to meet consumers’ specific demands). We show that such a practice can induce the consumer to make early purchases by increasing their rationing risk, increasing the product value, or diversifying the product line. © 2015 Wiley Periodicals, Inc. Naval Research Logistics 62: 435–453, 2015     

Bounding the optimal burn‐in time for a system with two types of failure

Burn‐in is a widely used method to improve the quality of products or systems after they have been produced. In this paper, we consider the problem of determining bounds to the optimal burn‐in time and optimal replacement policy maximizing the steady state availability of a repairable system. It is assumed that two types of system failures may occur: One is Type I failure (minor failure), which can be removed by a minimal repair, and the other is Type II failure (catastrophic failure), which can be removed only by a complete repair. Assuming that the underlying lifetime distribution of the system has a bathtub‐shaped failure rate function, upper and lower bounds for the optimal burn‐in time are provided. Furthermore, some other applications of optimal burn‐in are also considered. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004     

鱼雷最大航向估计在反鱼雷中的应用

在悬浮式深弹反鱼雷时,若只能根据声纳兵的经验估计鱼雷距离,如何正确估计鱼雷航向角范围就成为正确布放悬浮式深弹的关键.从直航雷的相遇三角形和尾流鱼雷命中目标条件出发,推导出鱼雷相对舰艇的正常提前角,从而确定鱼雷在被发现点的最大航向角范围,为正确投放悬浮式深弹提供了理论依据.