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为了改善声纳系统目标跟踪性能,提出并推导了一种带反馈的两声纳跟踪融合算法,利用声纳距离、方位测量,对由两同步声纳构成的声纳系统目标跟踪融合性能进行仿真研究,结果表明:该融合算法能有效改善由两声纳构成的声纳系统目标跟踪性能,对声纳系统数据融合处理技术研究具有较大参考价值. 相似文献
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多学科优化设计(MDO)是当前复杂系统工程设计中研究最活跃的领域。分析了传统多学科协同优化算法解决实际复杂MDO问题计算困难的原因,提出了一种符合工程实际的改进的协同优化算法(NCO)。NCO通过改变协同优化系统级表达形式解决传统协同优化计算成本大、收敛困难等缺陷。通过两个经典MDO测试算例与Alexandrov提出的改进松弛协同优化比较,优化结果表明,NCO能有效提高收敛速率,保证收敛结果的稳定性和可靠性,能更好地满足复杂系统工程优化需要。 相似文献
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对纯方位跟踪问题进行了描述,通过建立模型,设计求解算法,提出了一种解纯方位跟踪问题的非线性最小二乘方法,并将它与解纯方位跟踪问题的线性最小二乘方法进行了比较与仿真分析。仿真结果表明,非线性最小二乘方法具有较高的估计精度,是一种有效的算法,对潜艇实施隐蔽探测与跟踪具有重要意义。 相似文献
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舰载通信设备负载均衡研究 总被引:2,自引:2,他引:0
结合海军舰船通信系统语音通信的特点,从舰船通信综合控制管理系统研制的角度出发.抽象出一种数学模型.通过计算机仿真,对多种负载均衡算法的总体性能进行了分析,提出了一种适合海军舰船通信系统语音通信特点的,以最少使用时间为标准的最小负载调度算法. 相似文献
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Hee-Jung Kim Jung-Eun Choi Ho-Hwan Chun 《Journal of Marine Science and Technology》2016,21(1):129-144
The focus of this paper is on devising designer-friendly hull-form variations coupled with optimization algorithms. Hull-form variations are carried out through parametric modification functions. Two kinds of representative optimization algorithms are considered here. One is the well-known sequential quadratic programming which is the derivative based. The other is particle swarm optimization which is the derivative free. The results applying these two algorithms to typical hull-form optimization problems are discussed in the paper. The technique using the parametric modification functions has been developed for modifying the ship’s geometry according to the widely recognized naval architect’s design practice. An original geometry can be easily deformed through the change of the variables of the modification functions; and useful information about the effect of the parameters is immediately obtained. Moreover, the variables of the modification functions can be considered as the design variables in the formulation of the optimization problem. For the performance prediction of the hull form, WAVIS version 1.3 is used for the potential-flow and RANS solver. Computational results for both single- and multi-objective problems are presented. 相似文献
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一种求解结构可靠度的新型计算方法 总被引:1,自引:0,他引:1
提出了一种求解结构可靠度的软计算方法,该方法综合了人工神经网络的柔软性和遗传算法的全局性及并行快速性的优点.利用人工神经网络的柔软性,可以生成任意形状的函数,因而可以更加贴切地拟合功能函数;由于遗传算法具有并行处理能力,可以对多组样本同时进行处理,因此收敛速度加快.除此之外,文中的遗传算法还使用了小生境共享技术,有效地克服了陷入局部解的缺陷.并根据上述方法研制了结构可靠度分析的电算程序,算例计算表明,计算结果具有很高的精度,该算法为结构可靠度研究提供了一种新的思路和实现路径. 相似文献
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船舶航行性能优化是一个非常复杂的问题,它具有多个设计变量,多个约束和多个极点.传统的优化方法通常无法解决该问题.文中采用了一种传统的优化方法一复合形法(CA)和遗传算法(GA),模拟退火算法(SA)来计算船舶航行性能优化问题,比较了三种优化方法的输出结果并选取最好的那个解作为最终的优化结果.通过这种方法.可以以更高的概率获得真实的最优解.应该指出的是,这三种算法都作了某种程度上的改进.作者采用C++语言基于面向对象思想开发了计算软件-ShipPO.文中列出的所有船舶航行性能优化计算结果都是在ShipPO平台上计算出来的,结果表明采用三种优化方法计算一次船舶航行性能优化问题耗时并不太多.最终的结果表明ShipPO具有很强的寻找全局最优解的能力,它能够很好地满足工程需要. 相似文献
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基于线性预测方法的水声信道最小均方误差盲均衡 总被引:1,自引:0,他引:1
The problem of blind adaptive equalization of underwater single-input multiple-output (SIMO) acoustic channels was analyzed by using the linear prediction method.Minimum mean square error (MMSE) blind equalizers with arbitrary delay were described on a basis of channel identification.Two methods for calculating linear MMSE equalizers were proposed.One was based on full channel identification and realized using RLS adaptive algorithms,and the other was based on the zero-delay MMSE equalizer and realized using LMS and RLS adaptive algorithms,respectively.Performance of the three proposed algorithms and comparison with two existing zero-forcing (ZF) equalization algorithms were investigated by simulations utilizing two underwater acoustic channels.The results show that the proposed algorithms are robust enough to channel order mismatch.They have almost the same performance as the corresponding ZF algorithms under a high signal-to-noise (SNR) ratio and better performance under a low SNR. 相似文献