Effect of microstructure on short pulse duration shock initiation of TATB and initial response mechanism

Micro-TATB particles with different sizes and 3D nanoporous TATB architectures with different specific surface areas were prepared through recrystallization to study short pulse duration shock initiation properties by electric gun technology. For micro-TATB, the initiation threshold significantly decreases with TATB average size ranging from 79.7 μm to 0.5 μm. For 3D nanoporous TATB architecture, the initiation threshold decreases and then increases with specific surface areas increased from 9.6 m²/g to 36.2 m²/g. The lowest initiation thresholds are obtained for the micro-TATB with average sizes of 1.3 μm and 0.5 μm, and 3D nanoporous TATB architecture with specific surface area of 22.4 m²/g. The shock initiation thresholds of micro-TATB and 3D nanoporous TATB architectures show significantly decreases with the porosity increased. The decomposition reaction and thermal conductivity properties were further investigated to understand the initial response mechanism. High porosity provides more collapse sites to generate high temperature for formation of hot spots. The low thermal conductivity and decomposition temperature could enhance the formation and ignition of the hot spots, and initial decomposition reaction of TATB. The effect of the decomposition temperature is higher than that of the thermal conductivity on the shock initiation properties. The enhanced decomposition reaction could promote energy release and transfer process from the ignition to the combustion. This work offers a new insight to understand the effects of microstructure on the shock initiation properties and the initial response mechanism of TATB.     

武器装备试验计量保障有关问题的思考

计量保障是武器装备试验数据准确和试验质量可靠的重要保证,是考核与评价装备战术技术指标的关键环节,在武器装备的发展建设中发挥着不可替代的基础作用。本文结合目前武器装备试验计量保障工作的现状,从计量管理的法制化、试验计量保障能力建设、试验装备的强制检定和装备计量保障信息数据库等若干方面深入阐述了试验需求和法律法规要求,探讨了做好试验计量保障工作应采取的改进措施。     

“马赛克战”对装备体系试验鉴定的启示

自2017年8月DARPA公布“马赛克战”作战概念以来,世界各国都高度关注这一新型作战概念,学者们对“马赛克战”的研究也逐渐走向深入。本文首先从国际形势、美军装备特点、人工智能技术等方面分析了“马赛克战”的提出背景,回顾了其发展历程,剖析了其概念内涵,并从三个角度分析了其主要特点。接着着眼未来,从革新理念、鼓励创新、形成质变等视角探讨了“马赛克战”对装备体系试验鉴定领域未来发展方向的启示,重点论述了装备体系试验鉴定要向全智能作战体系试验鉴定方向发展的观点。最后聚焦当下,阐述了现阶段试验鉴定工作应重点关注动态互联互通性测试、互操作能力验证、新型仿真试验技术、系统自主能力等级评估及决策可解释性评估等五个方面的内容。     

Preservation of unimodality under shock models

A number of results pertaining to preservation of aging properties (IFR, IFRA etc.) under various shock models are available in the literature. Our aim in this paper is to examine in the same spirit, the preservation of unimodality under various shock models. For example, it is proved that in a non-homogeneous Poisson shock model if {p_k}_K≥0, the sequence of probabilities with which the device fails on the kth shock, is unimodal then under some suitable conditions on the mean value function Λ (t), the corresponding survival function is also unimodal. The other shock models under which the preservation of unimodality is considered in this paper are pure birth shock model and a more general shock model in which shocks occur according to a general counting process. © 1999 John Wiley & Sons, Inc. Naval Research Logistics 46: 952–957, 1999     

随机截尾场合下步进应力加速寿命试验的统计分析

给出了随机截几场合下步进应力加速寿命试验（步加试验）的统计方法,并讨论了其估计的方差问题．     

美军飞机易损性实弹测试现状及启示

飞机易损性分析与评估是指对飞机在战斗状态下遭受攻击后受损的难易程度的评价,是衡量飞机战斗性能的重要指标.研究飞机易损性对于飞机高生存力设计和飞机战伤预测评估具有重要意义.本文首先简要介绍了飞机易损性分析的一般方法与流程,收集并整理了美军飞机易损性实弹测试的历史沿革和条件建设现状,同时以F-35整机、F135发动机和C2...     

基于馈电信息的故障诊断技术研究

综合运用馈电信息基本理论,提出了一个基于馈电信息的故障诊断技术.该技术通过对馈电信息的比较、分析,从而实现对工作状态的监测和故障的检测;通过检测、分析馈电相关的频谱或相关的模式,实现状态分析和故障定位,完成对电子装备的故障诊断.     

舰载导弹火控系统精度试验仿真方法

通过对目前靶场舰载导弹火控系统精度试验中存在的问题及不足进行分析,提出运用仿真技术结合靶场精度试验进行火控系统精度和性能评定方法,根据精度试验的内容和目的建立了一系列相关仿真模型,并结合外场试验结果加以对比和验证,以提高试验鉴定的可信度。     

总线技术在武器装备测试系统中的应用及发展

总线技术在装备测试系统中占重要地位。VXI总线因具有优良性能而成为自动测试系统的优秀平台。介绍了总线技术的发展概况,分析了装备测试的重要性,着重论述了VXI技术的应用,用事实说明VXI总线技术必将随着装备自动化测试系统的发展而发展。     

分段试验的可行性

运用随机点过程方法,从理论上对可修系统能否进行分段试验进行了研究.论证了对于泊松过程模型分段试验的可行性,并研究了分段试验对参数估计的影响.