舰用锅炉过热器使用寿命的论证

鉴于某型舰用锅炉过热器破损的主因在于其内部腐蚀,而破损的主要方式是由管头的溃烂开始直至整个管头烂掉为止,导致管子的胀接松动而漏泄。因此,过热器的使用年限全取决于管头的腐蚀速度。通过确定过热器内管头的腐蚀率、锅炉年内运行时间以及保养时间等要素来估算过热器的使用寿命。     

论舰炮反导火控系统采用的目标运动观测向量

本文论述了近程舰炮反导火控系统附加独立信息测量的必要性,并根据观测向量（ｒ,ｒ,ε,β,δｂ,δｅ,ωε,ωｒ,ωβ）,导出了运动目标的位置和速度观测方程。据此,可以确切理解速率火控系统的解算原理。     

8031单片机在氩气自动焊接过程中的应用

在焊接流水线过程中,应用单片机进行控制,目前国内尚不多见。本文介绍了使用单片机控制氩气焊枪的方法,实现了焊接过程自动化,提高了产品质量和工作效率。本文对于单片机在工业上的实际应用具有一定的参考价值。     

舰炮平衡机分析

舰炮平衡机是一种迥然不同于传统平衡机的新型平衡装置,它具有多种功能,为提高固定式火炮的总体性能开辟了一条新途径。本文分析了某舰炮平衡机的结构原理和功能特点,并计算了作用在舰炮高低机齿弧上的不平衡力矩。     

鱼雷寿命周期费用研究技术

随着技术的发展,寿命周期费用的研究正日益受到关注。评述了国内外寿命周期费用方面的研究现状,介绍了鱼雷寿命周期费用研究方法的内容及用途,探讨了费用估算的一般方法,在鱼雷寿命周期费用分解原则的基础上给出了鱼雷寿命周期费用分解结构,讨论了寿命周期费用研究方法急需解决的主要问题,并对其今后的发展方向做了展望。     

Design of accelerated life testing plans under multiple stresses

Accelerated life testing (ALT) using multiple stresses is commonly used in practice to resemble the operating stresses at normal operating conditions and obtain failure observations in a much shorter time. However, to date, there is little research into the theory of planning ALT for reliability estimation with multiple stresses. ALT with multiple stresses can result in a large number of stress‐level combinations which presents a challenge for implementation. In this article, we propose an approach for the design of ALT plans with multiple stresses and formulate multistress test plans based on different objectives and practical constraints. We develop a simulated annealing algorithm to efficiently determine the testing plan parameters. We demonstrate the proposed method with examples based on an actual test conducted using three stress types. The obtained optimal test plans are compared with those based on fractional factorial design. © 2013 Wiley Periodicals, Inc. Naval Research Logistics 60: 468–478, 2013     

The defence firm of the future

This paper offers the personal view of a senior executive in the Defence Procurement Agency about the future requirements of the defence industry’s principal UK customer. The focus here is on trying to identify the type of corporate behaviour and range of skill sets that the UK Government will need from defence suppliers, both primes and supply chain companies in the future. The concluding message from this ‘Customer View’ is that there is likely to be a continuing market for the company that specializes in delivering defence capability. It will be a company that will be looking for a long‐term relationship, with a specialist knowledge of its various national customers and a willingness to work openly and closely with them. It will be agile in its ability to bring together diverse technologies, to package them as a system and to deliver them either as hardware or as a service. Such suppliers will also need to innovate and to adapt at least as rapidly as the threats that they seek to counter.     

某型炮射导弹工况射击时目标丢失现象分析

某型炮射导弹在定型试验期间出现瞄准线跳动、工作指示灯反复熄灭、目标丢失的现象,致使炮射导弹无法正常工作.造成制导火控系统工况转换的原因较多,为了快速查明该故障原因,利用模糊综合评判方法,较为准确地实现故障定位,通过后续试验数据结果证明,该方法有效可靠,对炮射导弹定型试验期间故障诊断具有积极的参考价值.     

自行高炮光电火控半实物仿真系统技术实现途径分析

介绍了自行高炮光电火控系统半实物仿真试验的基本原理和技术实现途径,提出了光电火控系统仿真试验的技术实现途径主要取决于目标模拟方式的观点.描述了图像注入式、屏幕反射式和准直投射式等3种目标模拟方式的功能、组成和工作原理.针对光电火控系统性能指标鉴定试验的特点,深入分析了3种方式的优缺点,认为屏幕反射式和准直投射式适用于鉴定试验,根据目前的技术发展水平,可优先发展准直投射式.     

坦克炮控伺服系统未知摩擦的自适应补偿控制

摩擦的存在导致坦克炮控系统出现低速爬行等现象,使系统性能变差。针对该系统,提出未知摩擦的自适应补偿控制。更具一般性的未知摩擦及系统的参数不确定性使得对摩擦的自适应补偿变的非常困难。在控制器设计中,通过精确估计摩擦及系统中的未知参数、观测摩擦内动态对其进行补偿,从而避免了由于简单地把摩擦看成外界扰动进行补偿所造成的系统性能的损失。同时全面考虑了系统的不确定性和外界扰动,使得控制器有较强的抗干扰性。