中国科技核心期刊
中国指挥与控制学会会刊
军事装备类重点期刊
中国指挥与控制学会会刊
军事装备类重点期刊
中国指挥与控制学会会刊
军事装备类重点期刊
With the connections between infrastructure networks being more and more closer, the theory of interdependent networks attracts the scholar after the isolated complex network theory. However, the literature on the current research status of interdependent networks is rare. After a systematic analysis of the relevant literature at home and abroad, the concept, types, and coupling mode of interdependent networks are briefly introduced. The cascading failure process of interdependent networks and some methods for improving the robustness of interdependent networks are described. The concept of load, capacity and the mechanism of load redistribution are expounded. Finally, some shortcomings of current research and the application prospect of related application fields are summarized, especially the application of interdependent networks theory in equipment support network.
Based on the knowledge graph technology, from the perspective of commanders cognizing the situation of battlefield within the scenario, a combination way of the top-down situational factors analytical method and the bottom-up formalization situational knowledge description method is employed to analyze and describe the entities and their relationships within the initial scenario situation. Its simpleness and effectiveness is presented by a typical example. It is highlighted to establish a good foundation of knowledge for situation intelligent cognition in joint operational situation.
Operational concept modeling framework is the basis and premise of standarding and guiding the development of operational concept. Based on the MBSE method, this paper puts forward the operational concept modeling framework, which including the overall description view model, environment view model, blue view model, task view model, capability view model, force view model, activity view model, operational view model.The logical relationship and detailed composition of each view model are analyzed, and the development strategy of framework is designed in detail. It can provide theoretical methods and means for systematic research of operational concept and engineering design.
Path planning methods for air penetration are mainly based on electromagnetic interference to reduce the radar detection area, such as A* algorithm for route planning. These methods are suitable for occasions with a few detection overlapping areas of radar network, but they are not accurate for the description of radar network’s capability and unable to indicate the threat state along the penetration route. To address this issue, this paper analyzes the basic principles for warning radar network, casts the air penetration process as a Markov decision process(MDP), and proposes one planning algorithm based on the heuristic search. Simulation result shows that this method can not only improve the penetrating probability of air aircrafts, but also provide threat state for pilots along the penetration route.
Aiming at the unreasonable problem of mobile unit path planning model in the current operational simulation experiment system, combining with the network characteristics of the optimal path problem, the application characteristics of the commonly used optimal path algorithm to the land battlefield grid spatial data model are analyzed. From the four aspects of maneuvering speed, environment factor, regional restriction and route finding direction, the key links to be grasped in building a maneuvering path planning model for land battlefield are analyzed. The common optimal path planning algorithm library and experimental tools are designed and developed. Through experimental verification and data comparison, the feasibility, efficiency and application scenarios of each algorithm used to construct the path planning model of mobile unit in land battlefield are analyzed.
In order to solve the problem of comprehensive use of ship-borne soft and hard torpedo defense weapons, aiming at launching suspended acoustic decoy first, then laying suspended depth charge, it takes the case of attacking torpedo is acoustic homing torpedo as an example, analyzes the deployment strategy of levitated depth charge considered acoustic compatibility, establishes and optimizes the calculation model of the deployment parameters of levitated depth charge, solves the model with complex algorithm, and gives a concrete example to verify the theory. The results show that the model can solve the coordination problem between the two types of weapons in theory, and provide theoretical reference and decision-making basis for the comprehensive use of soft and hard torpedo defense weapons.
The cooperative relationship between ship-borne radar and ship-borne early warning aircraft in naval integrated fire control-counter air (NIFC-CA) is studied. The cooperative anti-missile flow of radar subsystem in naval integrated fire control-counter air system is analyzed. The cooperative of early warning and detection department of early warning aircraft and ship-borne radar is constructed. The deployment model can be used for reference to improve the level of our army’s cooperative operations level.
This paper investigates the problem of target state estimation of the bearing-only target tracking of the underwater sensor network. Based on the existing research results, the SRCIF algorithm is introduced to tackle with this problem. And an event-triggered mechanism is designed to deal with the problem of the too much communication amount between sensor nodes and the fusion center. The corresponding state estimation algorithm is derived in this article. The simulation results show that the algorithm and the event-triggered mechanism proposed in this paper can reduce the communication amount, while ensuring the estimation accuracy and the convergence of the fusion center. This enhances the feasibility of the event-triggered mechanism in practical engineering application.
In the harsh environment of signals, the probability of multi-star failure increases. Traditional RAIM algorithms are mostly based on single-star failure assumptions, which can lead to missed or misdetected situations. The improved w-test method marks two fault stars each time, and separates the other satellites with the two stars for separability testing, and marks the star with the highest correlation exceeding the threshold as the fault star. At the end of the forward process, an initial acquisition of the fault-free constellation and preliminary location information is obtained. The observations that were mistakenly rejected can be recovered by the backward process.Pseudorange residuals,rather than least squares estimates,are used for the recovery of observations. The improved method is simple in design, small in computation, and convenient for engineering applications. Simulation analysis shows that the improved method can correctly identify single-star faults, double-star faults and seven-star faults.
When the target motion parameter has a big error, it can execute salvo of wake-guided torpedo. Firstly, the salvo of wake-guided torpedo method and mathematic model had been elaborated. Then, it was analysed the probability of two torpedoes or at least one torpedo catch target wake at the condition that only have target velocity error or only have target course error or only have distance error or have comprehensive error. Finally, it was pointed out the main influence factor of catching target probability in different conditions and advised to select the target angle 70°~90° fire position first.
For high-altitude control area, in order to assist the ground control personnel to monitor short-term flight conflicts in real time, and to solve the complex flight conflicts that may occur in multi-aircraft from a global perspective, this paper firstly establishes a spatial digital grid model based on flight safety intervals, and reasonably simplifies the motion model. Secondly, the short-term reachable domain of the aircraft is transformed into grid coordinates, and the numerically dimensioned method is used to obtain the conflicting reachable domain grid coordinates. On the basis of conflict detection, dynamic programming method is used to select the mutually exclusive grid coordinates which is obtained by traversing grid coordinates, and finally the conflict resolution decision of each aircraft is determined by the performance index. The simulation results show that the proposed method can effectively solve the complex flight conflict problem and provide the resolution decision that meets the safety interval and performance constraints before the TCAS(Traffic Collision Avoidance System), while the algorithm time can meet certain real-time requirements.
Combat effectiveness evaluation can provide reference and evidence for equipment development and combat decision of submarine combat system. Firstly, in the light of submarine combat system equipment development, comprehensive evaluation index system is established according to submarine combat system technology characteristic. Comprehensive evaluation method based on horizontal comparison is setup. The method can relatively compare different submarine combat system combat effectiveness. Then, in the light of submarine combat system combat decision, task-oriented individual evaluation index system is established according to submarine combat characteristic. Task-oriented combat plan evaluation method is set up. The method can compare combat effectiveness of different submarine combat plans. Finally, two examples of testing and verifying the correctness and feasibility of the evaluation methods are presented.
Achieving electromagnetic dominance of modern sea battlefield in macrocosm has been a new issue of sea operation and command. Evaluating the electromagnetic attack and defense operation control in sea battlefield has an important signification for improving the ability of finishing sea electromagnetic attack and defense task, showing sea electromagnetic attack and defense situation in the round, and deploying and controlling the electronic warfare force. The article uses the index of achieving the electromagnetic dominance as a point of view, and uses the target of analyzing the layered electromagnetic attack and defense operation in macrocosm as a sally port, and uses Bayesian Network to resolve uncertain information expression and reasoning questions, and uses these analysis models to evaluate if it is advantaged that the electromagnetic attack and defense operation for scrambling for electromagnetic dominance, and what is degree of advantage or which advantageous and disadvantageous conditions, all of these will provide gist for commanders in making certain battle plan and adjusting electronic warfare force deployment.
In order to verify the effectiveness of the inertial navigation system algorithm, a flight control simulation system is designed to generate flight trajectory data in line with the actual situation. The Strapdown Inertial Multi-subsample algorithm is written in Visual C++language. The SINS/GNSS integrated navigation system is designed based on the MFC modularization idea; based on UDP network, it can perform real-time navigation algorithm simulation verification. The simulation results show that the simulation verification system has good engineering application value for verifying the effectiveness of navigation algorithm and judging system performance.
In order to meet the needs of the carrier-based aircraft anti-ship force construction requirements and training generation mode, based on the practical training reform, the mission, applies scene, training characteristic and construction demand are systematically analyzed. Combined with system construction, the general framework, functional module and mathematical model is proposed, including simulation process and interaction relationship. On account of realization method, the scenario and control technology, force behavior support model technology, real-time LVC technology, guidance and evaluation technology are discussed. The research provides theoretical supports for anti-ship combat training of carrier-based aircraft test top design and innovation research.
The equipment test will have a great impact on the battle situation in the future, and the digital simulation logic validation of the operational test plan is the prior stage of the operational test means such as the actual or shooting range. Starting from the analysis of application requirements, this paper designs the overall structure of the system for generating operational test plan and logical validation, studies the realization ways of key technologies, and gives an application example based on the scenario of synthetic battalion level scenario, which can effectively support research on generation and validation of open equipment operational test plan.
The data of the chaff-jamming anti-missile test of the shipborne electronic countermeasure system is collected and analyzed. The simulation deduction system for shipborne chaff-jamming test data is realized based on the mixed programming design of C#.NET and Matlab. The system simulates the chaff-jamming anti-missile combat process of the ship under actual combat conditions, and evaluates the effectiveness of the ship passive interference countermeasure and the anti-ship missile penetration capability, which provides an important basis for the analysis and evaluation of the test results.
Aiming at the requirement of high speed, high efficiency and high fusion of military intelligent decision-making data, based on the analysis of the difficulties of data requirement, collection, analysis and service faced by military data at present, a military data engineering framework composed of requirement layer, data layer, knowledge layer, service layer and evaluation feedback process is proposed. The key contents and technologies of metadata, data quality, small sample feature extraction and service system construction which need to be paid attention to are pointed out, which lays a foundation for the construction of military data engineering.
A target recognition method based on expert system is proposed. By building the target knowledge base and semantic library, and using semantic recognition and forward reasoning techniques, the inference correlation of target feature information is realized, and the target type and attribute information is obtained. Its characteristics are that the knowledge base can be expanded online and support the result decision of the person in the loop. This method can be used as a potential way to improve the intelligence processing ability of command information system.
Person Re-ID is an important computer vision task, the purpose of which is to retrieve pedestrians with the same identity across the camera scene. Although there are many methods of feature space partitioning already in person Re-ID, they do not consider the problem of forming the occlusion subspace automatically. This paper proposes the use of spatial partitioning and spatial pooling to generate the initial occlusion feature subspace, and uses loss function constraints to further alienate the occlusion feature subspace, supplemented by multi-task learning to jointly train to improve the model performance. Experimental results show that the proposed model significantly improves the performance of person Re-ID. This method does not require additional information and the basic operation is in the feature space, so it is easy to add it to other models.
Aiming at improving the computational efficiency of trajectory estimation based on the Current Statistic—Cubature Kalman Filtering(CS-CKF) algorithm in boost phase, a simplified CS-CKF algorithm is proposed. According to the characteristics of the trajectory estimation model in boost phase, the Linear State Equation is adopted to realize one-step prediction of the state vector and state covariance matrix, and the Measurement Update Phase is realized by the Cubature Points nonlinear propagation. Experimental results show that, compared with the traditional CS-CKF algorithm, the proposed algorithm is rational and effective, the calculating time is reduced by 38% under the condition that the estimation error is equivalent.
Based on the background of anti-ship missile attacking ship, this paper studies and analyzes the terminal guidance problem subject to autopilot lag, terminal angular constraint and input saturation. The guidance system model with autopilot lag and terminal angular constraint is established and by transforming the terminal angular constraint into the expected line-of-sight angle constraint. Meanwhile, an adaptive anti-saturation terminal sliding mode guidance law with terminal angular constraint is designed based on the terminal sliding mode control theory, adaptive method and auxiliary system. The stability of the guidance system is proved using lyapunov theory, and the effectiveness of the proposed guidance strategy is verified by simulation.
Aiming at the control problem of an elastic missile, a longitudinal autopilot combined with an internal model controller and a reduced-order state observer is proposed as a generalization of the Raytheon three-loop autopilot. Firstly, starting from a control system model comprising elastic vibration characteristics, a reduced-order state observer is established to estimate state variables which can not be measured directly. Second, in order to satisfy the requirement for the autopilot to track the guidance command, a controller is designed according to the principle of internal model control, and the separation principle of independent design between observer and controller is proved. Finally, according to the related design specifications of the autopilot, effective control gains are obtained by solving the linear quadratic regulator problem (LQR). Simulation results show that the method of this paper has certain advantages over the classic Raytheon three-loop, where not only the stability of the attitude and the effective tracking of the overload command are achieved, but also the elastic vibration is significantly inhibited.
At present, most of the sonar domes used in domestic ships are made of FRP. Although they have good sound transmission performance, they are subject to turbulence at medium and high speeds, which will generate a lot of self-noise, reduce the performance of sonar, and even affect the normal operation of sonar. In this paper, a thick metal plate acoustic metamaterial using periodic micro-perforation treatment is proposed as a sandwich layer material, and a three-layer sandwich structure is constructed, which can be used as a construction material for the sonar dome. Through the analysis of the COMSOL simulation model, it is verified that the steel plate treated by micro-perforation with certain distribution law has higher sound transmission coefficient than the uniform steel plate, and is basically not affected by the thickness of the steel plate. And the three-layer sandwich structure has good sound transmission properties. The thick steel plate also has high rigidity and strength, which can effectively reduce the self-noise of the dome. This study can provide a reference for the design of the new dome.
In this paper, the propellant/liner bonding test piece of solid rocket motor is taken as the research object, and the uniaxial tensile test fixture is designed. Three different frequencies of vibration acceleration test and one-way shear tensile test are carried out. The influence of vibration time and vibration frequency on the maximum shear stress of the specimen is investigated by two-way analysis of variance. The results show that the vibration test at different frequencies has no significant difference on the maximum shear stress intensity of the propellant/liner bonded test piece, and there is no obvious interaction between the theoretical vibration time and the vibration frequency. At the same frequency, the maximum shear stress that the propellant/liner bonded specimen can withstand decreases with increasing theoretical vibration time. From the original unvibrated state to the theoretical vibration of 180d, the estimated maximum shear stress intensity of the specimen at three frequencies decreased by 6.24%, 6.15% and 6.56% compared with the initial maximum shear stress.
