Modern Defense Technology

Development Tendency and Key Technology of System Intellectualization

FENG Jie-hong

2020, 48(2): 1-6. doi:10.3969/j.issn.1009-086x.2020.02.001

Asbtract ( 558 )

PDF (846KB) ( 1508 )

References | Related Articles | Metrics

The development of future combat and equipment shows a trend of systematization,intelligence, and fighting. Based on the new engagement concepts of “Distributed defense” and “Mosaic warfare”, the characteristics of future joint engagements such as dispersal node, flexible architecture, dynamic organization and intelligent coordination are proposed. And the system of system (SoS) intelligence is indicated as the advanced stage of military intelligence development. Furthermore, according to the development process of information and intelligent technology, as well as the influence of scientific and technological revolution on weapons and engagement forms, the evolution law of the system of system intelligence is put forward. It will evolve towards the direction of automation, autonomy and self-evolution. Finally, on the basis of the mission of the system of system development and the main direction of construction, some enabling technologies of future system of system intelligence are given. It will provide potential theoretical guidance for form, architecture, operation and engagement effectiveness of the system of system.

Overall Design of Tiltable and Deformable High-Rise Rescue Multi-Rotor Aircraft

SHI Qi-peng, HE Xiao-ping, HAN Dong, SANG Yu-wei

2020, 48(2): 7-14. doi:10.3969/j.issn.1009-086x.2020.02.002

Asbtract ( 250 )

PDF (3256KB) ( 932 )

References | Related Articles | Metrics

Aiming at the problem that the high-dimensional stereoscopic complication of urban construction leads to the missing of golden rescue time and the reducing of rescue efficiency in high-rise fire,the overall design of a high-rise rescue-deformed multi-rotor aircraft with tilting force was proposed,and its overall performance was analyzed with modeling.Through calculation and selection,the model number of the main components that meet the design conditions was obtained.It verified the feasibility of the aircraft carrying rescue materials and equipments to complete active rescue work.Putting it into the high-level rescue equipment market can effectively extend the gold rescue time and truly improve the survival rate of the trapped people.

Missile Flight Planning System Based on Spatial Coverage Analysis

SONG Bo-wen, WANG Mao-cai, DAI Guang-ming, BAO Qian, PENG Lei, SONG Zhi-ming, CHEN Xiao-yu

2020, 48(2): 15-21. doi:10.3969/j.issn.1009-086x.2020.02.003

Asbtract ( 266 )

PDF (5187KB) ( 1130 )

References | Related Articles | Metrics

Fousing on the necessary of avoiding the detection of missile by enemy satellites,a calculation method of satellite coverage in space area was firstly discussed. Then, the evaluation index of missile trajectory safety was put forward, and the optimization model of missile trajectory safety path planning was constructed. Based on the analysis of space coverage, a missile flight planning and decision support software system with completely independent intellectual property rights was designed and developed. The architecture and function modules of the software were deeply analyzed.The simulation result proves that the system can make the missile in the monitoring range of introsystem satellite and avoid the detection of enemy satellites, which improve the probability of successful penetration.

Defense Concept of Marine Ship Againsting Heterogeneous Unmanned Swarm System

ZHANG Yao-hua, YUAN Jun, YANG Xiao-yan, SONG Shen-min

2020, 48(2): 22-29. doi:10.3969/j.issn.1009-086x.2020.02.004

Asbtract ( 303 )

PDF (3384KB) ( 961 )

References | Related Articles | Metrics

Considering the urgent need for the construction of marine ship defense system under the new situation and the present condition about rapid development of unmanned system swarm technology as a new type of threat,a kind of defense concept and alternative solution from the aspects of the detection and interception in a setting of marine ship encountering the threat of unmanned aerial vehicle (UAV) swarms and UUV is proposed unmanned underwater vehicle swarms.In detail,different defense concepts under the circumstances of air and underwater are given from two perspectives of defense strategy which are passive defense after alarming and active defense for pre-detecting.what’s more,the relevant technologies involved in the defense concept is explained,suggestions about corresponding development and the key technologies which need to be solved are given.The conception has a positive reference value and practical significance for the future ship defense system,and provides preliminary and feasible research ideas for the future ship equipment construction.

Explosion Equivalent Quantitative Evaluation of Global Blowup Warhead

TU Guo-yong, WANG Hai-feng, LU Xiao-fei, YANG Hong-bing

2020, 48(2): 30-34. doi:10.3969/j.issn.1009-086x.2020.02.005

Asbtract ( 304 )

PDF (764KB) ( 982 )

References | Related Articles | Metrics

Explosion equivalent quantitative evaluation of global blowup warhead changes with many factors such as explosive payload and charging type etc. To get some relatively accurate experimental result, concluded and analysed the empirical formula of the shock-wave propagation laws, and built the computational analysis model, which achived the explosion equivalent quantitative evaluation of global blowup warhead.The quatitative evaluation with the model enhances the confidence of the damage experimental result.

Missile Trajectory Optimization Based on Adaptive Control Genetic Algorithm

WANG Mu-shen, TAN Xiang-xia

2020, 48(2): 35-39. doi:10.3969/j.issn.1009-086x.2020.02.006

Asbtract ( 312 )

PDF (567KB) ( 957 )

References | Related Articles | Metrics

Based on previous missile trajectory optimization which optimized sectionally,design the pitch angle and the flight sequence of the tajectory integrally to make the missile lower and farther at the separation time of the 3rd stage engine.A dynamic model was built firstly.Then the optimization variables,the objective function and the restrictions were designed.The missile trajectory optimization was calculated and simulated with adaptive genetic algorithm.The simulation result shows that missile trajectory designed this way has lower altitude further range and better flight performance.

Adaptive Sliding-Mode Guidance Law Using Line-of-Sight Rate Only

TIAN Yuan, WANG Jun-bo, XIU Jing-ya

2020, 48(2): 40-44. doi:10.3969/j.issn.1009-086x.2020.02.007

Asbtract ( 282 )

PDF (1005KB) ( 914 )

References | Related Articles | Metrics

Focusing the difficulty of constructing efficient guidance law for law for missile with passive seeker and maneuvering target A new guidance strategy using only the line-of-sight (LOS) rate measurement was proposed for the missiles with passive seekers. The initial relative range, initial closing velocity and their error boundaries were utilized to obtain their estimations according to the missile-target kinematics. A guidance law based on sliding mode control (SMC) theory was firstly presented, in which the boundary of target maneuvering ability is needed and the chattering phenomenon inevitably exists. In order to overcome the disadvantages above, an expression with a time-varying parameter is introduced to the new guidance law and the stability analysis is included. One of the main features of the proposed guidance strategy is that it reduces the influence of the relative range and the closing velocity on the interception and enhances the effect of LOS rate. The performance of the new guidance law was studied via a computer simulation. The effectiveness of the new guidance law was illustrated through intercepting two kinds of maneuvering target successfully.

Passive Ranging Based on Image Sequence

LI Yu-zhao, ZHANG Ying-jie, ZHANG Wei, LIU Yan, CHEN Xi

2020, 48(2): 45-49. doi:10.3969/j.issn.1009-086x.2020.02.008

Asbtract ( 280 )

PDF (1182KB) ( 885 )

References | Related Articles | Metrics

Considering the characteristics of the uniform motion of the missile and target before intersection,the target image measured with infrared seeker was used to analyze the passive ranging method based on target image area and target image gray-scale.The target image model was established.Two ranging equations based on image area gradient and image gray-scale gradient were deduced without target parameter.The correctness of the two ranging methods were verified by simulations.These two methods provide references for passive infrared image ranging.

Construction Method of Complex Electromagnetic Interference Environment for Air Defense Missile Weapon System

KANG Yi-ding, ZHANG Zhen-wu, MAO Ying

2020, 48(2): 50-54. doi:10.3969/j.issn.1009-086x.2020.02.009

Asbtract ( 323 )

PDF (1054KB) ( 1110 )

References | Related Articles | Metrics

In the research process of air defense missile weapon system,it is an urgent problem to improve the fidelity of complex electromagnetic environment construction,which should be similar to the scenario. According to analyzing the electromagnetic interference environment faced by air defense operations,the quantitative indicators of the fidelity of electromagnetic interference environment were given arately from the equivalent simulation of interference scene, interference tactic, interference technology and interference intensity, which formed the construction method of complex electromagnetic interference environment of air defense missile weapon system.The method has referential value for test verification of air defense missile weapon system.

Non-Fuzzy Non-Uniform Circular Array Interferometer Direction-Finding

WANG Yong-jun, CHI Hao

2020, 48(2): 55-59. doi:10.3969/j.issn.1009-086x.2020.02.010

Asbtract ( 247 )

PDF (2689KB) ( 907 )

References | Related Articles | Metrics

In order to solve the problem of dual-or multi-mode composite guidance detection under the limited diameter ,based on the basic principle of interferometer direction-finding, a design method of direction-finding antenna system with high precision and non-fuzzy non-uniform circular array interferometer was presented.The element antennas are set up based on the idea of stagger baseline ambiguity resolution in this method. The method was proved to be reasonable, effective and feasible by means of mathematical analysis and simulation results.

Coherent Integration Algorithm for Moving Targets with Variable Acceleration

XIN Ting-ting, WANG Guo-hong, ZHANG Liang, ZHANG Xiang-yu

2020, 48(2): 60-68. doi:10.3969/j.issn.1009-086x.2020.02.011

Asbtract ( 244 )

PDF (5940KB) ( 853 )

References | Related Articles | Metrics

In order to solve the problem that energy accumulation cannot be realized effectively due to several kinds of range migration and Doppler migration of high-speed maneuvering target,a coherent accumulation algorithm for moving target with variable acceleration was proposed,which did not need to search parameters. Firstly, made a sequence reversing transform along the slow time of pulse compression echo signal in frequency domain and multiplied them with ones untransformed,which could simultaneously correct linear range migration caused by velocity, third-order range migration and Doppler bending caused by acceleration. Secondly, the second-order keystone transform was used to correct the range bending caused by acceleration.Finally, the slow time signal was regarded as a linear frequency modulation signal, and the coherent accumulation was realized with the biothogonal Fourier transform to estimate the chirp rate. The simulation result proves that this method can effectively realize accumulation and multi-target detection, which is superior than other algorithms.

Study on Data Processing Method for Shock Wave Overpressure Measurement

WANG Hai-feng, LU Xiao-fei, XU Guo-yong, JI Chong

2020, 48(2): 69-73. doi:10.3969/j.issn.1009-086x.2020.02.012

Asbtract ( 350 )

PDF (1914KB) ( 1026 )

References | Related Articles | Metrics

To standardize the processing flow of shock wave measurement data in damage experiment, an automatic batch processing method for shock wave measurement data were proposed based on the regional correlation principle of shock wave propagation. The adaptive filter was used in noise processing. The validity test of measurement data was realized by confirming the existence of step waveform in the time range of shock wave arriving at sensor. Mean value method was used to extract shock wave overpressure. Shock wave measurement data processing is efficient and automatic batch processing. The accuracy of data processing is improved.

Design of Desktop Test System for Flight Control Dynamically Pedestal Alignment

XU Fei, YUAN Jie-bo, TIAN Ruo-si, DING Xiao-qin RONG Wan-ting

2020, 48(2): 74-80. doi:10.3969/j.issn.1009-086x.2020.02.013

Asbtract ( 217 )

PDF (2464KB) ( 895 )

References | Related Articles | Metrics

Contraposed the problem that flight control dynamically pedestal alignment can not test the overall dynamic process because of the constantly changing external information, a kind of desktop test system for flight control dynamically pedestal alignment based on MFC and Matlab technology was proposed. The system has multiple functions such as test environment setting, first convergence testing, convergence quality assessment, navigation error testing. By replacing dll dynamic-link library file of Matlab digital simulation, it can achieve universalization of flight control dynamically pedestal alignment.

Design and Development of Generalized Software Platform Based on 1553B for Satellite Test

AN Ran, LUO Xiao-cheng, FENG Jian-feng, LI Hui-yuan, ZHANG Guo-dong

2020, 48(2): 81-88. doi:10.3969/j.issn.1009-086x.2020.02.014

Asbtract ( 247 )

PDF (2961KB) ( 991 )

References | Related Articles | Metrics

To adapt the stand-alone testing and system testing for different staellites at the same time,distributed software architecture was introduced into satellite ground test. A generalized software platform was set up with main software ,database and client program based on 1553B.The design of the platform introuced the concept of hardware interface standardization,function modulization and configuration. Firstly, hardware construction and software design of the platform were shown. Then, requirement analysis and software modeling of the platform were done. At last, generalized software platform was realized. The generalized software platform based on 1553B for satellite ground test was verified to have strong commonality and full coverage of tests, which can be better at meeting the test demand of multiple equipments in satellite system.

EMC Prediction and Design of Airborne Platform

WANG Sheng-xi, ZENG Xiao-dong

2020, 48(2): 89-95. doi:10.3969/j.issn.1009-086x.2020.02.015

Asbtract ( 211 )

PDF (1459KB) ( 873 )

References | Related Articles | Metrics

Electromagnetic compatibility (EMC) of airborne platform has become an important limiting factor affecting the performance of platform operations. By analyzing the mechanism of electromagnetic interference of airborne platforms, describing in detail the influence of electromagnetic interference of airborne equipment on receiver sensitivity of susceptive equipment, a model for rapid system-level electromagnetic interference prediction was constructed. Finally, the methods to specifically solve the EMC problems of airborne platform were given, which were applied to several different types of aircraft. Practical tests show that the EMC of platform has a good effect and the airborne equipment works well.

Table of Content