Online task planning method of anti-ship missile based on rolling optimization

Based on the wave attack task planning method in static complex environment and the rolling optimization framework, an online task planning method in dynamic complex environment based on rolling optimization is proposed. In the process of online task planning in dynamic complex environment,online task planning is based on event triggering including target information update event, new target addition event, target failure event, weapon failure event, etc., and the methods include defense area reanalysis, parameter space update, and mission re-planning. Simulation is conducted for different events and the result shows that the index value of the attack scenario after re-planning is better than that before re-planning and according to the probability distribution of statistical simulation method, the index value distribution after re-planning is obviously in the region of high index value, and the index value gap before and after re-planning is related to the degree of posture change.

Study on Anti-ship Missile Saturation Attack Model

Based on the analysis for the interception process of ship-to-air missile system to the anti-ship missile stream, the antagonism of ship-to-air missile and anti-ship missile stream was modeled by Monte Carlo method. This model containing the probability of acquiring anti-ship missile, threat estimation, firepower distribution, interception, effectiveness evaluation and firepower turning, can dynamically simulate the antagonism process of anti-ship missile attack stream and anti-air missile weapon system. The anti-ship missile's saturation attack stream for different ship-to-air missile systems can be calculated quantitatively. The simulated results reveal the relations among the anti-ship missile saturation attack and the attack intensity of anti-ship missile, interception mode and the main parameters of anti-air missile weapon system. It provides a theoretical basis for the effective operation of anti-ship missile.

Damage effectiveness assessment method for anti-ship missiles based on double hierarchy linguistic term sets and evidence theory

The research on the damage effectiveness assessment of anti-ship missiles involves system science and weapon science, and has essential strategic research significance. With comprehensive analysis of the specific process of the damage assessment process of anti-missile against ships, a synthetic damage effectiveness assessment process is proposed based on the double hierarchy linguistic term set and the evidence theory. In order to improve the accuracy of the expert ’s assessment information, double hierarchy linguistic terms are used to describe the assessment opinions of experts. In order to avoid the loss of experts ’ original information caused by information fusion rules, the evidence theory is used to fuse the assessment information of various experts on each case. Good stability of the assessment process can be reflected through sensitivity analysis, and the fluctuation of a certain parameter does not have an excessive influence on the assessment results. The assessment process is accurate enough to be reflected through comparative analysis and it has a good advantage in damage effectiveness assessment.

Research on terminal maneuver strategy of anti-ship missiles

To design the terminal maneuver strategy of an anti-ship missile,first,the analytical solution of miss distance when an anti-ship missile has planar weaving maneuver and three-dimension spiral maneuver is presented,in which not only the amplitude and frequency are considered but also the initial phase is taken into account.Next,based on the analytical solution of miss distance,the effects on the miss distance of the amplitude,frequency,initial phase of the anti-ship missile＇s maneuver acceleration and the order of flight control system of the air-ship missile are analyzed.Finally,the optimum weaving maneuver and spiral maneuver which make the miss distance be the largest under some conditions are designed,which is of important meaning for increasing the survival probability of the anti-ship missile.

Improvement of Intercept Probability Algorithm for Anti-ship Missile Based on Search Theory

Traditional intercept probability model has some drawbacks and can not meet the demands of command and control system. Aiming at this problem, a new calculation method based on search theory, terminal control area distribution function of anti-ship missile, target distribution function and missile's radar scan feature is proposed. Under the condition of common target distribution, an intercept probability model for present point attacking is determined. The simulation verifies its effectiveness and establishes the selecting model for aiming point when enemy ships evade in high speed.

Firepower distribution method of anti-ship missile based on coupled path planning

Anti-ship missile coordinated attack mission planning is a complex multi-objective optimization problem with multiple combinations of platforms, strong decision-making constraints,and tightly coupled links. To avoid the coupling disorder between path planning and firepower distribution and improve the efficiency of coordinated attack mission planning, a firepower distribution model under the conditions of path planning is established from the perspective of decoupling optimization and the algorithm is implemented. First, we establish reference coordinate system of firepower distribution to clarify the reference direction of firepower distribution and divide the area of firepower distribution;then, we construct an index table of membership of firepower distribution to obtain alternative firepower distribution plans;finally, the fitness function of firepower distribution is established based on damage income, missile loss,ratio of efficiency and cost of firepower distribution, and the mean square deviation of the number of missiles used, and the alternatives are sorted to obtain the optimal firepower distribution plan. According to two simulation experiments, the method in this paper can effectively solve the many-to-many firepower distribution problem of coupled path planning. Under the premise of ensuring that no path crossing occurs, the optimal global solution can be obtained, and the operability and timeliness are good.

Penetration Capability Comparison of the Same Anti-ship Missiles Between Millimeter and Centimeter Wave Seekers

This paper compares the penetration capabilities of the same type anti-ship missiles with millimeter wave(MMW)seeker and centimeter wave seeker,and constructs mathematical models of penetration probability and saturation attack number for all anti-ship missiles used in the countermeasure system,according to the rule which makes the ship-borne air defence system oppase as far as possible and equally,and combining the actual combat situation.It can be seen,from analysis of the countermeasure process between anti-ship missile and surface naval ship,that for the same type of anti-ship missile with different seekers,the main influence on the penetration capability is from electronic jamming system.Based on the built model,the penetration capabilities of the same type anti-ship missiles with MMW and centimeter wave seekers are simulated.The simulated results show that the penetration capability of MMW seeker is slightly better than that of the centimeter wave seeker and its saturation attack number is also influenced by the discovering probability greatly.Finally,some suggestions to get superior penetration effect are given for a commander to choose seeker type suitably.

基于目标概略航向的反舰导弹纯方位攻击法

为充分利用累积的目标历史方位测量信息,提高反舰导弹纯方位攻击时的目标捕获概率,在估计目标概略航向的基础上,采用几何分析和三角函数分解方法,建立了导弹纯方位攻击提前转向角与目标速度、导弹速度间的解析关系式,获得了导弹末制导雷达百分之百捕获目标区域半径计算模型和目标捕获概率的计算方法。仿真结果表明,通过设置提前转向角可显著提高反舰导弹末制导雷达目标捕获概率,增大百分之百捕获目标区域半径,有助于提升反舰导弹作战效能。

桥墩倾斜方向对自浮式防撞装置防护效果影响研究

随着航道上大跨度桥梁的建设愈加广泛,其桥墩在水面附近往往具有一定的倾斜角度。为研究桥墩倾斜方向对自浮式防撞装置防护效果的影响,文章基于装备自浮式防撞装置的2种倾斜方向的桥墩与6000DWT级散货船为研究对象进行非线性有限元仿真碰撞计算,分析桥墩倾斜方向对不同航速船舶撞击下桥墩撞击力、系统能量转换、船艏结构破坏的影响。结果表明:外倾式桥墩受到撞击力更小,其防撞装置通过变形吸收能量更多、防护效果更好。研究成果可为大跨度桥墩设计与防撞装置的开发提供重要的参考价值。

广域网环境中舰船通信网络信息安全传输方法

为满足舰船在广域网环境的安全通信需求,提出广域网环境中舰船通信网络信息安全传输方法。基于云计算技术构建具备信息调度的舰船通信网络信息安全传输模型,并针对舰船通信广域网环境存在的来自不同方向的通信干扰源、信号衰减和噪声干扰,结合噪声消除算法进行舰船通信网络信息传输抗干扰设计,降低外界干扰影响;针对舰船通信广域网环境中实时信息在传输过程中面临的攻击、窃听、截取等多种安全威胁,采用双混沌互反馈加密方法完成舰船通信网络传输信息加密,保障信息在广域网环境下安全传输。实验结果表明,该方法可显著提升舰船通信速率,在不同干扰类型下均表现出良好的抗干扰性能;加密后信息可成功掩盖原始数据分布特征,保障传输信息安全性。

极地航行船舶防覆冰涂层研究进展

两极地区是未来重要的能源和资源基地。然而,极地长年低温多冰,极大限制了我国对两极地区的科学考察、商业航运和能源开发进程。因此,发展长效稳定的防覆冰技术是推进极地发展战略的关键。系统阐明了船舶在极地航行过程中面临的结冰困境,分析了船舶积冰的类型,总结了目前解决船舶覆冰问题的多种防除冰技术及发展现状,包括主动防除冰技术(机械除冰、超声导波除冰、加热除冰、化学熔融除冰等)和被动防覆冰涂层技术(气体润滑防覆冰涂层、液体润滑防覆冰涂层、“类液体”润滑防覆冰涂层、界面可控断裂防覆冰涂层等),同时对各技术在极地船舶防冰应用中的优缺点和可行性进行了深入分析。展望了船舶装备对特种防冰涂层的关键需求,提出主、被动协同除冰技术是实现极地船舶防覆冰的重要策略。

反舰导弹大前置角下三维剩余飞行时间估计方法

为解决导弹开启末制导时初始前置角过大或前置角变化幅度较大的问题,设计适用于多种导弹制导律的前置角三维剩余飞行时间估计方法。将导弹速度和目标速度投影分解,在地面坐标系的Oxy面和Oxz面上建立弹目相对运动关系方程,以此为基础建立三维弹目相对运动模型。利用弹目相对运动关系方程和比例导引控制方程,建立1阶非线性微分方程,解析弹目距离与前置角的关系,并利用麦克劳林展开式求解方程。根据视线角速度变化选择合适的内框角,对前置角进行补偿,同时使用中位值平均滤波法降低前置角波动造成的误差。利用已建立的三维弹目相对运动模型进行仿真实验。仿真结果表明,在小角度假设不能成立时,尤其是因制导律进行角度控制而导致前置角变化较大时,前置角剩余飞行时间(Time-to-go,TGO)估计方法的估计值误差收敛时间和最大误差值要小于其他TGO估计方法,估计效果最佳。

一种反舰导弹打击下补给船目标的易损性分析方法

[目的]针对目前在舰船目标易损性分析方法研究方面的迫切需求,提出一种反舰导弹打击下补给船目标的易损性分析方法。[方法]以某典型补给船为攻击目标,选择反舰导弹作为攻击武器,分析目标的构效关系。通过数值模拟得到反舰导弹内爆载荷作用下补给船的动态响应,研究反舰导弹内爆载荷作用下关键部件的毁伤破坏及毁伤判据,得到补给船功能的毁伤程度。对补给船目标易损性进行分析,判断使其航行功能造成最大程度毁伤的攻击方法。[结果]形成了从目标构效关系分析、关键部件毁伤模式、毁伤准则与判据,到目标功能毁伤程度的易损性分析方法的流程。根据目标易损性分布信息,得出瞄准非冗余部件集中的位置进行打击可起到最强的攻击效果。[结论]可为舰船目标易损性的研究提供技术支撑,辅助决策火力筹划。

基于性能的通航桥梁抗船撞评估方法及应用研究

为合理有效地开展通航桥梁抗船撞性能评估,提出基于性能的桥梁抗船撞标准化评估方法。基于现行《公路桥梁抗撞设计规范》(JTG/T 3360-02-2020),从抗撞性能等级确定、设防代表船型确定、船撞力计算、船撞效应计算以及抗撞性能验算等方面,采用结构性能目标作为评估准则,建立桥梁抗撞性能评估各环节流程的标准化评估方法。以江苏扬中三桥为应用实例,运用该方法进行该桥20号墩抗撞性能评估,结果表明:20号墩桩基顺桥向抗弯性能不满足JX1级要求,其余验算结果满足要求,桥墩抗撞性能综合评估结果为不满足要求。参照评估结果该桥加装了浮动式防撞设施。桥梁抗撞性能评估标准化,可准确高效实现桥梁抗撞性能等级确定、船撞效应计算、抗撞性能验算等预期的评估功能要求。

船闸深孔反弧门实时在线监测技术应用研究

针对船闸输水系统工作反弧门长期在深孔动水条件下频繁启闭,给船闸安全运行造成安全隐患,提出一种深孔反弧门实时在线监测技术方案。为掌握深孔反弧门运行情况,将已密封好的应变及倾角等传感器布置在闸门上,再利用钢丝网架胶管将采集信号输送至在线监测系统。监测系统实时进行反弧门在线监测与数据显示,并实时分析结构应力、运行姿态及启闭力,根据分析结果,给出不同等级报警信息及相应的处置建议,提示运行操作人员对反弧门采取对应措施。对广西大藤峡水利枢纽船闸反弧门实施实时在线监测,测试数据表明实施的反弧门实时在线监测系统是可靠稳定的,证明将实时在线监测技术应用于深孔且动水频繁启闭的闸门是可行的。

基于飞行时间差的异构反舰导弹任务分配研究

在异构反舰导弹集群的任务分配这一研究背景下,针对导弹集群打击敌方水面舰艇的任务分配这一问题,提出了一种基于时间协同的任务分配策略。根据导弹基本作战原则以及导弹作战态势信息,提出了时间协同优势函数,并改进距离与速度优势函数,形成综合优势函数。在反舰作战对抗环境下,建立了一种反舰导弹动态任务分配模型,并提出了在线分配算法求解任务分配模型,最后通过仿真案例验证模型的有效性。

船闸闸门新型重力消能式防撞装置设计及应用

随着船舶进出闸速度的提高,碰撞闸门风险增大。为保障船闸与船舶的安全性,基于重力消能原理提出一种船闸闸门新型重力消能式防撞装置,具有满足水位变幅大、机构简易、易于维护等特点。同时根据长洲四线船闸工程设计了主要由双卷筒卷扬机、消能配重组件、浮筒机架、拦阻链索4个主要部分组成的防撞装置。现场撞击试验表明:当3000吨级满载散货船分别以0.3 m/s和0.6 m/s的速度撞击拦阻链索时,配重与浮筒的高度被提升,拦阻链索最大拉力为8.6 t,船舶的制动最大距离为12.8 m,均在设计允许的范围内。该防撞装置能有效抵挡船舶的撞击,保护船闸闸门,提高船闸的通航安全性和通航效率,具有良好的推广应用价值。

某舰炮破片弹丸对反舰导弹毁伤的数值模拟

为研究舰炮破片弹丸对空中运动反舰导弹的毁伤规律,采用有限元软件建立破片弹丸毁伤反舰导弹的数值模型,在动态爆轰过程分析弹丸速度对破片生成规律的影响,在毁伤过程探讨破片群冲击反舰导弹的特征。结果表明,与静态爆轰相比,动态爆轰破片呈喷射状散布;随着弹丸速度的衰减,生成破片的速度明显下降,但破片群受炸药驱动的速度增量却逐渐增大;同时,不同速度弹丸的破片速度曲线均呈快速上升至波动上升至趋于稳定的趋势,但快速上升段受弹丸速度的影响不同;破片群的毁伤形式主要有贯穿、侵彻随行、切割跳飞以及未相遇4种情况,在1/4弹丸中,贯穿破片占比5.5%,有效破片占比38%。

美国NMESIS导弹武器系统反舰作战能力评估分析

海军/海军陆战队远征反舰系统(NMESIS)是美国海军陆战队参与分布式海上作战,封锁关键航道的重要组成部分。通过分析影响该新型导弹系统反舰作战能力因素,构建导弹系统反舰作战能力指标体系,运用熵值法计算指标权重,改进的模糊综合评判法进行评估,评估结果表明,该型导弹武器系统的反舰作战能力处于“良好”水平,结合评估结果分析影响该型导弹武器系统作战能力强弱的原因,提出对策建议。

国外主战舰载电子战装备发展特点及启示

第四次中东战争,埃及、叙利亚导弹艇攻击以色列舰艇的“冥河”导弹受干扰无一命中目标,反舰导弹与电子战的博弈正式走上舞台。随着反舰导弹制导技术的发展进步,水面舰艇面临的威胁日益凸显。为提升应对能力,主要军事强国不断完善舰载电子战装备体系、提升反导对抗能力。通过分析外军装备情况及主要特点,为我军装备建设发展提供借鉴和参考。