发挥鱼雷航程远,能够根据线导指令按指定搜索策略对位置散布目标实施机动搜索的特点,潜艇利用特殊海洋环境远距离发现目标.在目标方位不连续、不准确的情况下,建立对目标运动要素的概略解算,根据概略目标运动要素,进行鱼雷机动搜索策略规划,对目标距离进行粗判,定下攻击决心,发射并控制导引鱼雷在目标散布区域实施机动搜索.在目标运动要素更新后,可重新规划鱼雷搜索策略,通过导引线发送至鱼雷,鱼雷实施新的机动搜索,提高鱼雷发现目标概率.

T he optimal eluding strategy and the minimal avoidable alarm distance are important refe-rence factors for a surface ship in defense against acoustic homing torpedoes .First of all ,a model is established for the surface ship to predict acoustic homing torpedo trajectory .Then ,an analysis is made of the optimal strategy of the ship being able to get away from the self-guided searching range of torpedoes .On this basis ,a computing model of the minimal avoidable alarm distance is further estab-lished for the surface ship to elude acoustic homing torpedoes .Finally ,the quantitative analysis and simulation of the typical battlefield situation and equipment capability show that the results of research are of guiding value to the surface ship in defense against acoustic homing torpedoes .

When the moving information of target can′t be accurately gained, for the torpedo send platform, the target is distributing in a certain area. In order to promote the finding probability, the character of long sailing capacity of torpedo can be used to design an expanding spirality trajectory, this can render the torpedo to cover the target distributing area. Based on this assumption, the parameters to describe torpedo expanding spirality trajectory are brought forward, the trajectory is simulated and analyzed, its application conditions and its disadvantages are concluded.

The technology on synthetically defense against sub-launched torpedo is a front problem need to be mainly solved in surface ship's anti-torpedo research. According to the difference of guidance mode in sub-launched torpedo,the launching mode and the trajectory characteristics on straight-running torpedo,acoustic homing torpedo,wake homing torpedo and wire-guided torpedo are analyzed through simulation. Aiming at some familiar countermeasure equipments in the world including 3 sort of soft weapons,4 sort of hard weapons and surface ship's maneuver strategy,every sort of weapon's application method is analyzed qualitatively while defense against torpedo synthetically. Some rules on tactical application are analyzed and summarized. The result can provide theoretical and technological support for the action of surface ship synthetically defense against sub-launched torpedo.

When a submarine receives information about a surface object from spy platform,the location,speed and course of the object have certain error.Using thaler formula,the location calculating formula is simplified,combined with the probability theory,the probability density of object location is calculated.In allusion to a model tactical situation,probability density of object location in different time is calculated,the map of probability density is drawn and is compared with map made by computer simulation method.

The multi-target grouping provides force level situation information for submarine threat assessment. Starting with mathematical description of this problem,the article researches the realization of multi-target grouping with two processes,based on the quantity difference of information source which is available to submarine and the demand of information fusion. Firstly the clustering-matching grouping is studied based on improved ISODATA and template matching,and then the distributing-verifying grouping is studied based on two-dimensional distribution and space direction comparability. Finally the model of multi-target grouping is constructed. This model can meet the necessary of operational group identification by submarine on the sea battlefield with applicability to multi-source information and uncertainty information,and can use for reference for grouping under other background.

The space-group on the sea battlefield is the foundation of that distilling the force level situation information from the object level target information. Aiming at the deficiency of existing cluster algorithm and the characteristic of obtainable target information,this article researches the problem of space-group formation using the improved ISODATA. Firstly,character vector and cluster measure are selected,secondly ISODATA is improved from two aspects which include amending multi-density clustering and original cluster center preference,lastly the clustering result is identified by assistant information to accomplish the space-group formation modeling. Compared with existing method,the improved algorithm has evident advance on the clustering validity,applicability and operation efficiency by simulation analyzing. This model can satisfy the requirement of space-group formation,and use for reference for clustering under other background.

Aim at the existent question of developing the warship Computer Generated Forces decision-making system as lack of maintenance and flexibility,we brought forward a method for designing the system based on CBPN(Context based Petri Net).After analyzing the course of warship batter operation and compartmentalizing the behavior modal,we built the CBPN modal of warship battle decision-making,and constructed the knowledge-base of the force.Moreover,a decision-making system was completed and the result shows that the method can enhance the efficiency and deduce the complicity of maintenance of system.

When probability density of target is known,according to the searching means and moving search trajectory of acoustic homing torpedo,calculate the relative trajectory to the center of target distributing area,using the principle of calculus,calculate the integral range through simulation,the probability density function is integrated by numerical method,thus the find probability is gained.

As it is difficult to assess quality of information of fleet operation by traditional methods, a new method was given to solve the problem and a model of information quality assessment was built based on information entropy. Then, a thought of fleet operation information quality assessment database is given to offer a way to acquire the quality of information （QoI） in time indexed by the operation situa- tion and operation time in the database. The method gives a beneficial way to evaluate the fleet operation efficiency and offers an aid for fleet operation decision.

Compared with lower level data fusion,the development effect of threat assessment's systematic solution is not obvious.Aiming at this actuality,we firstly clarified the difficulties of threat assessment,then constructed the framework of threat assessment system based on the thought of hypothesis generation,hypothesis evaluation and Abstraction,proposed the three elements for threat situation hypothesis and reasoning approach,and developed the model of intentional threat.To facilitate computer realization,we gave a formal representation to the related concept,reasoning and belief propagation using set theory and predicate calculus.This research supplies a new solution for threat assessmen,and lays the foundation for the further development of threat assessment theory and application.

The method of many bearings and one initial distance is commonly used to calculate objcet moving element,and the accuracy of the provided initial distance has adirectimpaton the reliability of calculating directly.In order to estimate the accuracy of the initial distance in time,the concept of bearing delta is introduced,which acts as the main base of modifying the estimated initial distance for submarine commander.Bearing delta is deduced from real object bearing observed and reckoned object bearing which is calculated from objcet moving element calculating results based on partial object bearings.The rules of bearing delta and the difference between estimated initial distance and real initial distance can be used to quickly and efficiently modify the estimated inital distance and render the calculating process to ideal results.

The surface ship formation cooperative antisubmarine pattern has put forward a new research subject to the submarine threat evaluation in the operation integrated decision.Based on the ship formation antisubmarine characteristics,the research introduces coefficient on attack intention,coefficient on effectiveness for a given period of time,coefficient on attack fulfilling into the index of threat judge,and constructs the model of submarine's threat judge aiming at fleet from three aspects,that is,fleet's attack intention,effectiveness for a given period of time of attack and possibility of attack fulfilling.This model extends the threat evaluation's using scope to multi-object and formation domain,makes it possible to depict the threat of battlefield entirely,and puts forward an idea about further development of submarine's threat judge module.

Multi-target tracking is a focus of study in target tracking area at present,in which the passive tracking is complicated and very useful in actual combat.In order to improve the accuracy and stability of multi-target tracking algorithm and to reduce computation cost,the particle filtering was used together with Gibbs sampling method.The particle filter can resolve the problem of nonlinearity of state evaluation in target tracking,and extend it to the domain of multiple targets tracking.The Gibbs sampler was used for data association to reduce the computation cost and increase the accuracy of association.Simulation results demonstrated the availability of the studied tracking algorithm.

The aim of this paper is research on the model for the threat evaluation of the fleet air defense operation.Firstly,the intuitionistic fuzzy set and intuitionistic fuzzy hybrid prioritized ordered weighted averaging(IFHPOWA)operator are introduced.Then based on the demand of the fleet air defense operation,the IFHPOWA operator based threat evaluation model for the aerial targets is developed.Finnally,the model proposed in this paper is illustrated with a practical example also.

In order to meet the needs of the intelligence of the platform and the reuse of the simulation resource for the ASW military domain,considering the characteristics of ASW and the new need of the simulation system,we give a analyze of the function of warship platform,and make the module and the Agent model of it from the aspect of the macroscopical and microcosmic point,and make the design of HLA federates with the XML and the information communications which satisfy the need of simulation granularity and enhance the reuse, flexibility,and extensibility of the model resource.

系统仿真科学与技术作为科学研究的第三种方法,在作战研究中已得到越来越广泛的运用。作战仿真系统、合理的实验方法、仿真数据的记录和挖掘分析是作战仿真实验的三个基本要素。作战仿真实验关键技术包括实验数据挖掘分析、作战计划的形式化表述与计算机生成兵力等。

The target situation estimation of the submarine battlefield is the important factor in submarine operation systems,and is the important premise for the decision making of submarines.Based on the modified initial condition and background value GM(1,1) of the segmentation model,using Grey System to forecast azimuth sequence can overcome the non-linear and non-stability of the azimuth sequence,and get better forecasting result in case of little information.The three factors of the target situation are divided to combine the different grey kinds,and the azimuth set is obtained through simulation.Using the grey trend relational grade,considering the approaching and comparability,the target situation is acquired.An example is given to show that the model can get the target situation quickly,and provide the profitably information for submarine.

In order to deal with single warship anti-submarine search,setting up the definition of active-use of mobile acoustic decoy,and via the description of fundamental problems and establishment of concerned math-model,the paper introduces simulation results of several typical states and validate and analyze the feasibility of breaking through search for submarine using mobile acoustic decoy forwardly.There is a certain significance to submarine acoustic countermeasure

In order to quantize attack intention aiming at submarine,firstly distill checkout value of attack intention from the information that the submarine can attain;next cluster all the objectives that the submarine can detect out using the identification of fleet based on objectives' information elements clustering;lastly measure the evidence of fleet's attack intention by coefficient using the inference on fleet's attack intention based on the variable weight multi-objective decision.The researching makes it possible to figure out fleet's attack intention,which is based by the subsequence work of threat evaluation.