潜艇垂直面运动自适应神经网络模糊控制仿真

神经网络控制和模糊控制技术的广泛应用为潜艇自动舵控制器的设计提供了新的思路.而模糊规则的提取和隶属函数的学习是模糊推理系统设计中重要而困难的问题,自适应神经网络模糊推理系统(ANFIS)结合模糊控制和神经网络控制的优点,基于sugeno模糊模型采用反向传播法和最小二乘法调整模糊推理系统的参数,并自动产生模糊规则.利用方法对潜艇乖直面运动自动舵控制器进行了设计和仿真.从仿真结果来看,自适应神经网络模糊控制器能较好的实现对潜艇垂直面运动的操纵控制,是一种很好的控制方法.     

潜艇操纵运动的舵效仿真研究

针对潜艇空间操纵运动数学模型的复杂性,运动方程中水动力系数难以全部取得以及方程解算难度大等问题,在不影响潜艇空间运动主要特性的前提下,通过理论分析和实操经验以及计算机仿真需要,从潜艇对称性和潜艇运动特性人手,对现有潜艇空间操纵运动模型进行了合理地简化和求解,并进行了计算机仿真验证.根据计算机仿真结果对潜艇舵效进行了研究分析,为通过控制潜艇方向舵角和首、尾升降舵角来联合操纵潜艇运动提供了良好的参考和依据.     

潜艇水平面操纵运动模型误差仿真分析

潜艇水平面运动模型是对潜艇水平面操纵运动进行仿真模拟的基础,运动模型选择的合适与否将直接影响潜艇操纵运动仿真的精确性和实时性。为此,以某型潜艇为研究对象,编制潜艇水平面线性与非线性操纵运动仿真程序,通过仿真并与实艇试验数据比较,分析了两种操纵运动模型的仿真误差,结果表明潜艇水平面操纵运动非线性模型误差远小于线性模型误差,与线性模型相比较,水平面非线性操纵运动模型具有更高的使用价值。     

潜艇垂直面操纵运动模型误差仿真分析

研究潜艇操纵运动性能优化问题,潜艇垂直面运动模型是潜艇垂直面操纵运动稳定性的基础,运动模型建立的精确与否将直接影响潜艇操纵运动精确性和实时性。为此,以某型潜艇为研究对象,编制潜艇垂直面线性与非线性操纵运动仿真程序,通过仿真并与实艇试验数据比较,分析了两种操纵运动模型的仿真误差,结果表明潜艇垂直面操纵运动模型中的非线性项的影响非常小,由于解算线性模型的速度要比非线性模型快得多,证明垂直面线性操纵运动精确性对垂直面内的自动操纵有很大提高,说明垂直面线性操纵运动模型很有使用价值。     

水下机器人的电化学防护研究

研究了我国水下机器人用材ＰＯＤ９１９与ＬＤ３１铝合金２在３．５％ＮａＣｌ溶液中的腐蚀性能,测定了铝合金的阴极保护参数及不同系列的牺牲阳极的电化学性能,并选择了合适的牺牲阳极。针对机器人内部构件的紧凑性与复杂性,研究了隙缝尺寸对实施阴极选择的影响,提出了对不同构件采用的电化学保护措施。     

某海底铜硫矿石可选性试验研究

某海底铜硫矿石含铜9.80%、含硫44.24%,为确定该类型矿石铜硫回收的适宜工艺条件及药剂制度开展了选矿试验研究。最终闭路试验获得的铜精矿含铜21.42%、铜回收率为8842%,硫精矿含硫51.41%、含铜0.718%、硫回收率为56.67%。该工艺流程及药剂制度合理,选矿指标稳定,为该矿石资源的铜硫综合回收提供了依据。     

Quantifying the accuracy of numerical collapse predictions for the design of submarine pressure hulls

An overview of current design practices for submarine pressure hulls is presented, along with the results of a survey of the literature that was conducted to determine standard nonlinear numerical modelling practices for those structures. The accuracies of the conventional submarine design formulae (SDF) and nonlinear numerical analyses for predicting pressure hull collapse are estimated by comparing predicted and experimental collapse loads from the literature. The conventional SDF are found to be accurate within approximately 20%, with 95% confidence, for intact pressure hulls. The accuracy of a wide range of nonlinear numerical methods, including axisymmetric finite difference and general shell finite element (FE) models, is found to be within approximately 16% with 95% confidence. The accuracy is found to be within 9% when only higher fidelity general shell FE models are considered. It is shown how the observations taken from the survey could serve as a starting point for establishing modelling guidelines, quantifying the accuracy of nonlinear FE analysis in pressure hull collapse calculations, and introducing this method into a design procedure by way of a partial safety factor.     

反潜直升机多段往返检查搜潜建模与仿真技术研究

潜艇因其隐身性,在水下很难被发现.本文根据反潜直升机利用吊放声呐搜潜的战术应用,对可疑区域进行快速有效地检查搜索.建立了应用于单机检查搜潜的多段往返搜潜模型.并结合水下潜艇的航行,对搜索过程进行仿真,分析了吊放声呐探测点间隔系数对模型搜潜概率的影响,为区域检查搜潜战术制定提供了参考.     

The role of patents in establishing global telecommunications

In the 21st century we have access to virtually instantaneous communications: for instance, our interaction with the Internet has given us unlimited opportunities unknown to our forefathers. It all began with telegraphy, an innovative application of new discoveries in electricity and electromagnetism in the early 19th century. From around 1840 electrical communication systems became highly commercialised and eventually very profitable, attracting entrepreneurs and inventors such as Wheatstone, Thomson, Bell, Edison and Marconi who, between them, revolutionised communication systems in the late 19th century and led to global telecommunications by the early 20th century. This paper explores the role of patents in driving this telecommunications revolution.     

潜艇装备应用研究系统HLA FEDEP的研究

潜艇艇载武器装备的作战性能是决定潜艇作战效能高低的物质基础，是潜艇战斗生命力的关键所在，潜艇装备应用研究系统(EARS)为潜艇武器装备论证、定型和发展提供了依据。该文基于高层体系结构(HLA)机制，重点研究了潜艇EARS的联邦开发与执行过程(Federation Development and Execution Process, FEDEP)。