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371.
黄考利 《军械工程学院学报》2002,14(2):39-42
针对反坦克导弹系统动态过程仿真的输出具有短时序、低信噪比的特点 ,研究了应用ARMA谱估计验证导弹系统仿真模型有效性的方法 ,并结合某型号滚转稳定的反坦克导弹系统复杂模型的仿真数据和简化模型的仿真数据给出ARMA谱估计的应用结果。 相似文献
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Within a reasonable life‐testing time, how to improve the reliability of highly reliable products is one of the great challenges to today's manufacturers. By using a resolution III experiment together with degradation test, Tseng, Hamada, and Chiao (1995) presented an interesting case study of improving the reliability of fluorescent lamps. However, in conducting such an experiment, they did not address the problem of how to choose the optimal settings of variables, such as sample size, inspection frequency, and termination time for each run, which are influential to the correct identification of significant factors and the experimental cost. Assuming that the product's degradation paths satisfy Wiener processes, this paper proposes a systematic approach to the aforementioned problem. First, an intuitively appealing identification rule is proposed. Next, under the constraints of a minimum probability of correct decision and a maximum probability of incorrect decision of the proposed identification rule, the optimum test plan (including the determinations of inspection frequency, sample size, and termination time for each run) can be obtained by minimizing the total experimental cost. An example is provided to illustrate the proposed method. © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 514–526, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10024 相似文献
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A system reliability is often evaluated by individual tests of components that constitute the system. These component test plans have advantages over complete system based tests in terms of time and cost. In this paper, we consider the series system with n components, where the lifetime of the i‐th component follows exponential distribution with parameter λi. Assuming test costs for the components are different, we develop an efficient algorithm to design a two‐stage component test plan that satisfies the usual probability requirements on the system reliability and in addition minimizes the maximum expected cost. For the case of prior information in the form of upper bounds on λi's, we use the genetic algorithm to solve the associated optimization problems which are otherwise difficult to solve using mathematical programming techniques. The two‐stage component test plans are cost effective compared to single‐stage plans developed by Rajgopal and Mazumdar. We demonstrate through several numerical examples that our approach has the potential to reduce the overall testing costs significantly. © 2002 John Wiley & Sons, Inc. Naval Research Logistics, 49: 95–116, 2002; DOI 10.1002/nav.1051 相似文献
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针对工程应用中雷达视频数据量大、难于实时传输的问题,分析了雷达视频数据的信息冗余和信号相关等特点,提出了一种基于小波变换的雷达视频数据压缩算法,并用该算法对实际采集的某型雷达视频数据进行压缩、解压缩处理。结果表明:该算法具有较高的压缩比和较好的信号恢复质量,具有一定的实用价值。 相似文献
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数据链系统处理雷达数据信息时,要求一个跟踪算法能够更有效地滤除杂波,消除虚警。在单传感器环境下,若落人相关波门内的回波多于一个,那么这些候选回波中可能都是来自目标,也可能由杂波产生。概率数据互联算法(PDA)能充分利用跟踪门内的回波,具有较小的误跟、丢失目标的概率和计算量较小的优点。通过实现 PDA 算法,证明了它在杂波环境下可以取得好的跟踪效果。 相似文献
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