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舰载雷达伺服系统线性二次型性能指标的确定 总被引:1,自引:0,他引:1
在舰载雷达伺服系统中应用最优控制设计时,如何确定二次型性能指标是一个重要问题,正确也否直接关系到系统性能的好坏。本文阐述如何根据经典理论中常用的系统闭环主导极点来推出舰载雷达伺服系统的线性二次型性能指标,并给出了计算实例。 相似文献
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雷达抗海杂波性能是涉海雷达重要性能指标,直接影响雷达完成作战任务的能力,雷达海杂波模拟技术是通过理论分析与设计,产生与实际环境的相似的雷达回波信号。通过分析海杂波特性与雷达海杂波模拟技术,设计实现一套能够用于海上测量雷达应用的雷达模拟器。 相似文献
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本文通过深入研究有源静态标定、无源动态标定与二次雷达标定等舰载雷达标定方法,基于实际工程作业中标定设备真值精度需求,进一步明确舰载雷达标定技术方案设计原则,初步完成舰艇雷达标定系统方案设计,在满足雷达精度的前提下,极大的缩短舰载雷达的标定试验周期,提高工作效率,减少探测误差,保障舰艇雷达的性能指标,对舰载雷达的建造调试具有一定指导意义。 相似文献
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舰艇隐身包括雷达波隐身、声隐声、红外隐身、光隐身等,隐身技术已成为现代战斗舰艇重要的性能指标。介绍雷达波隐身的基本概念,探讨在水面舰艇设计中,如何采取措施,控制舰艇的雷达动向截面(RCS),提高水面舰艇的雷达波隐身能力。 相似文献
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通用雷达射频信号模拟器可以模拟产生多种体制的雷达信号,用于电子战指战员的日常训练及电子战设备性能测试、评估等。该模拟器通过设置和加载不同体制的雷达参数,采用灵活的数字波形产生方式形成数字信号,控制DDS产生多种体制的雷达信号。该模拟器通过实践使用证明性能指标达到设计要求。文章介绍了雷达射频模拟器的用途和功能,描述了它的系统组成及关键技术。 相似文献
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Y.H. Venus Lun Michael BrowneKee-hung Lai Christina W.Y. WongT.C.E. Cheng 《Research in Transportation Economics》2011,32(1):64-70
Container shipping and its related service sectors help accelerate globalization of the world economy. This industry has been experiencing rapid growth, prompting container terminal operators to increase their handling capacity in response. Providing container terminal services requires substantial capital investment in physical assets such as cargo handling facilities and information systems. On the other hand, operating container terminals is a long-term investment that typically spans several business cycles. Hence prudent asset management using appropriate tools is critical for container terminal operators to sustain their businesses. Generally, due to risk-adverseness, investors are unwilling to take more risk in their investment unless they can reap a higher return. Contrary to this argument, this study finds no direct influence of better firm performance as a proxy of higher return on business risk-taking by container terminal operators. Instead, scale of operations is positively associated with business risk-taking, suggesting that container terminal operators with a larger scale of operations are willing to take more business risk. 相似文献
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激光对潜通信技术在现代战争中发挥着越来越重要的作用.文章介绍了国外激光对潜通信技术的发展历程以及装备的研制、改进情况,指出了在现代战争中发展激光对潜通信技术的优势和重要性,重点探讨了几种激光对潜通信技术的性能及其特点,最后论述了激光对潜通信技术的发展动向与分析. 相似文献
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采用ABAQUS软件,建立深水钻井隔水管的有限元模型,对隔水管的力学性能进行了研究。在此基础上,对隔水管参数敏感性进行了分析,研究深水钻井隔水管力学性能在不同工况下的变化规律,得到一些有用的结论可供工程应用参考。 相似文献
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Zhuo Chen 《Maritime Policy and Management》2017,44(5):537-550
This study identified a set of applicable and practical green performance evaluation indices for Chinese ports using the Delphi technique. The research was conducted by targeting three representative Chinese ports in Eastern China: the Shanghai Port, Ningbo Port, and Qingdao Port. An effective expert panel was structured with direct stakeholders related to green performance, which was based on a sufficient consideration of the unique and the special decision-making system for Chinese ports. Twenty-one green performance indices in six dimensions (i.e. liquid pollution management, air pollution management, noise control, low carbon regulations and energy savings, marine biology preservation, and organization and management) were eventually identified through three rounds of iterations. The identified green performance indices for Chinese ports are highly consistent with the Chinese Government’s environmental policies. Compared with European ports, the green port performance indicators in China are not as comprehensive. The indicators that are strictly consistent with national macro policies and the factors that are more easily seen, heard, and felt were perceived to be more important. From an academic perspective, this study offers a new approach for system establishment and green practice criteria exploration and thus provides a significant basis for further green port studies. 相似文献
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自组网路由协议可依驱动方式分为表驱动和按需驱动,这两种驱动方式的路由协议各有其优缺点.对这两类路由协议的路由发现延迟、路由开销、网络吞吐量等性能进行了对比分析,并结合短波自组网在网络中心战体系中所处的层次和主要应用对性能的需求,分析了适应于短波自组网的路由驱动方式. 相似文献
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