As the difficulty of torpedo twice turn angle parameter solving under predetermined encountering situation,we constructed a model of torpedo and target targeting point meeting model considering the con-dition of underway time after first turn angle to adjust the “first meeting”position before the movement of second turn angle,and gave an iterative solving method of this problem.Finally it gave a simulation for the model and the result proved the validity of the method and met the need of torpedo twice turn angle param-eter solving.

According to the needs for operational simulation and military simulation training, this paper proposes a concept of a digital torpedo and its technical requirements by considering the complexity of a modern torpedo and its interaction with weapon system, and builds a torpedo trajectory model and an external control model with interfaces. Moreover, the technical scheme of a digital torpedo is designed by adopting the external trajectory simulation method, in which performance parameter is related to torpedo type, and trajectory stages are related to simulation process and tac-tical situation. In addition, an application example of an operational simulation training system is programmed with Visual C++. The result shows that the scheme can meet the requirements of real-time, accuracy and expansibility for an operational simulation training system.

This paper studies some issues concerning applications of hypothesis testing in military engineering,including hypothesis choices,test threshold determination,and construction of sufficient statistics. There are some general instuctions in the literature in handling these issues. In real engineering applications,they often need careful designing,which involves both expertises and experiences. Various problems may also arise in such applications,which are often neglected. These issures and problem are emphasized and suggestions for taking good advantage of the hypothesis testing tool in engineering applicaions are given.

按照潜射鱼雷的相遇原理,通过对鱼雷最小射距以及最小射程的分析比较,论证了一定射击条件下,鱼雷的最小射程是描述鱼雷最小射击范围的唯一参量.在分析影响鱼雷最小射程因素的基础上,给出了其计算方法.最后,依据发射平台的探测能力和可能的战术情况,论述了鱼雷最小射程对战术平台承担作战使命的限制,并提出了缩小鱼雷最小射程的主要途径和方法.

To compute the parameters of two-time turn angle shooting of a torpedo for predetermined encountering situ-ation, a general model satisfying the requirements of different shooting modes is constructed by considering possible special trajectory and torpedo velocity change. The formulas for Newton iteration algorithm are given. The correctness of the proposed model and algorithm is validated by numerical experiment, and the results indicate that the model and algorithm can satisfy the computation requirements of the shooting parameters for straight running, acoustic homing, wake homing, salvo, target selection, etc.

Based on the analysis of the fact that underwater platform acquire the objective information,this paper points out that it is hardly to achieve that wire-guided torpedo is guided automatically during the whole process by the method of fixed guided cycle.The design of wire-guided torpedo guided scheme must make full use of objective information resource from any avenue and the high-speed resource of torpedo.Only in this way can the paper enhance the wire-guided torpedo usability.The conception is advanced that the guiding occasion is decided by certain condition.There is a technical method that schedule objective orientations from each sensor and control the scheduling occasion of the guiding Algorithm according to priority using manager depending on conditional dispatching.Using the method of discontinuous guiding to balance the contradiction between detecting of guiding platform and rapidly torpedo's arriving,this paper gives the technical method and way target's speed detecting by sonar,conversion method and conversion interval in the paper.

In order to exert operational effectiveness for torpedo,this paper bring forward the conception of sub-launched torpedo favorableness meeting situation,points out that torpedoes of every homing method need second turning angle firing when first turning angle firing can't satisfy torpedo to approach and find the target with favored meeting situation.The key point of second turning angle firing—how to choose the second turning point is emphasized systemic research,based on giving out the second turning angle firing occasion and count model used in submarine torpedo weapon system.The paper imposts choosing method of the distance between the second turning point and given meeting point based on torpedo homing detected distance,so to make the choose of second turning point have more rationality and pertinence,and can be suitable for all kinds of torpedoes which include straight running torpedo.

When a submarine finds a surface target by sonar from far distance,target motion parameters detected and calculated have the bigger error.Using Thaler Formula,the location calculating formula is predigested,combined with the probability theory,and 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,at the same time the map of probability density is drawn and is compared with map made by computer simulation method.

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.

This paper studies some of the issues concerning the development of navigable underwater acoustic decoy(NUAD) for submarine.NUAD's combat missons are studied from considerations of characteristics of submarine defense operations.Two basic concepts,forced use and willingly use of NUAD,are introduced.Counter-countermeasures of NUAD's major rivals(i.e.,anti-sub torpedoes, anti-sub crafts,and seabed anti-sub acoustic web,etc) are also analyzed.Necessary functions for advanced NUAD,including deception capacities of acoustic,motion,and size are proposed.

For the maladjustment between equipments development and relevant concepts,technical method,this paper studies submarine torpedo attack task course and firing control process considering characteristics of submarine torpedo attack and attack application requirement.The paper points out that weapon system must supply the relevant function capability and several technical methods to realize the function capability based on the elaborations of torpedo weapon operation mode and tactical significance.

According to the characteristic of capturing target information by Underwater platform and the guiding mechanism of wire-guided torpedo,this paper expatiates on the relative term concepts,resolving problems and correlation of wire-guided torpedo guiding control,and points out that the key of improving the wire-guided torpedo guiding operational performance is optimizing guiding project.By means of analysing existent problems of 'automatic guiding',the raised optimized wire-guided torpedo guiding project must think out of the constraint of depending on the single sensor and 'full range tracking' concept,make full use of target information and torpedo velocity,exert operation user,s dominant position.So can enhance the capability of adapting complex operational environment and,further,fully exert the weapon,s operational effectiveness.

With the greatly improved performance of submarine launched heavy torpedo and the requirement of intelligent operation, it is necessary to realize the long range heavy torpedo’s maneuver search that can cover the target’s location error which results from projecting platform’s position precision and the target’s intentional maneuver after submarine launching the torpedo. Realizing it can also make the long range heavy torpedo adopt well to the changed strike tactics -point to area. After defining the concept of heavy torpedo’s maneuver search and analyzing the occasion of using maneuver search, this article constructes the techonology framwork of the heavy torpedo’s maneuver searching trajectory.

加强对军费支出的监督和控制,应创新军费支出监督手段,改进监督方法,实现监督的实效化、信息化、全程化、法制化、民主化.要健全军费支出监督机制,建立闭合循环体系,构建垂直领导体制,明确监督机构职责.应建立军费支出监督信息反馈系统,加快军费支出监督的程序化进程,打造军费支出监督专业人才队伍,完善军费支出监督相关的配套措施.

According to tactical requirements of operational application for torpedo weapon and technical conditions of guidance and control for wire-guided torpedo,we analyze the influence of torpedo′s radiation noise and velocity on the operational application,and discuss the importance and necessity of adopting multispeed for a wire-guided torpedo.Simulation shows that if the advantage of torpedo velocity can not be taken effectively,huge limitation still exists in torpedo′s operational application in spite of the multispeed.In order to improve the tactical efficiency of the wire-guided torpedo with multispeed,the torpedo launch platform should offer some different guidance methods,so that the torpedo may take shorter time to approach the target with high speed,and keep lower radiation noise to make better use of the sonar detection with low speed.In addition,we indicate some problems to be solved in application of the alternative high or low velocity guidance method.

According to the attacked decision-making demand of the new type wire-guided torpedo in submarine,a new method is proposed in this paper,taking the real-time forecast results of torpedo's range as the attacked decision-making gist of submarine wire-guided torpedo based on analyzing the disadvantages of the traditional gist.This paper puts forward the analytical mathematical model of real-time forecast of torpedo's range in consideration of synoptically moving factors of the targets based on analyzing the azimuth guiding method in detail,and the mathematical model can forecast torpedo's range and wire-guiding time.The plenty emulation results show that the model is reasonable and the new method can meet the needs of attacked decision-making gist of wire-guided torpedo.

Based on the main trend and the technology characteristic that submarine weapon system has transform into weapon channel organization, some difficulties in submarine torpedo attack operation are analyzed witch is increased with the improving of anti-torpedo technology. In order to remedy the deficiency in torpedoes salvo operation by a single self-guided mode in counterattack state, the concept of Torpedo Multi-way Launch Control (or Torpedoes Salvo by Different Self-guided Mode) is put forward. Some critical correlative links are researched, some methods and models on international interference among torpedoes, calculation and input of torpedo launch parameter are established.

Aiming at the diversification of function system and homing modes in the development of submarine-launched torpedo,this paper analyses the advantages in operational application of wake homing torpedo based on its mechanism,such as stronger counter-countermeasure,higher speed,and higher target acquisition probability for selected target.It also analyses the limitations in tactics,such as limited attacking speed and the types of attackable targets,greater loss in torpedo range,difficult combination with wire-guidance,and inaccurate attack on moving targets.Moreover,this paper suggests that homing mode be rationally configured and selected according to mission and tactical requirement of submarine when development and operational application of torpedo weapon are planned.

Taking defence against ship formation as background,this paper discusses the tactical reasons,technical conditions and possibility for developing long-range torpedo,and puts forward the concept of submarine group attacking and guidance way by using leading torpedo.Moreover,operational concept of realizing long-distance attack against ship formation and regarding torpedo as launching-platform or anterior detector is presented,and major technologic characters and functional requirements of the long-range torpedo are analyzed.