Modern Defense Technology

Non-Fragile Prescribed Performance Control of Waverider Vehicle

Xiang-wei BU, Bao-xu JIANG

2022, 50(4): 1-9. doi:10.3969/j.issn.1009-086x.2022.04.001

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A new non-fragile prescribed performance control （PPC） protocol without any online learning parameter is proposed for the waverider vehicle （WV） to address the problems of existing PPC methods with a large amount of online learning and obvious fragility defects. By designing a new type of performance functions with re-adjusting function， the low-complexity-based control laws are developed for the velocity subsystem and the altitude subsystem of WV， and the problem of “explosion of terms” inherent to back-stepping is avoided. The stability of closed-loop system and the guarantee of prescribed performance are proved based on Lyapunov synthesis. Compared with the existing PPC， the improvement of the proposed method is that the constructed prescribed envelope is capable of actively adjusting its shape according to the error fluctuation caused by sudden disturbances， which avoids the possible control singular problem and makes up for the fragility defect of the existing PPC. The effectiveness and advantage of the addressed method are verified via compared numerical simulation.

Top-Level Conception of Hypersonic Vehicle Defense System Construction

Si-tong LIU, Zhan-yue ZHANG, Da LIU, Yi-qiao XU

2022, 50(4): 10-16. doi:10.3969/j.issn.1009-086x.2022.04.002

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At present， in the construction of hypersonic defense system， the United States has a strong lead and Russia has made steady progress. Facing hypersonic threats and focusing on the needs of future hypersonic defense operations， the top-level construction of hypersonic vehicle defense system is proposed. It should be accelerated from four aspects， including designing the top-level reasonable structure， developing integrated collaborative equipment， exploring joint countermeasure strategy and carrying out system evaluation research， to explore the development path of improving hypersonic defense combat capability and maintaining national strategic security.

Research Progress of Electromagnetic Shielding Shelter Technology

Hai-wei GUO, Yuan LI, Sheng-hui MAO

2022, 50(4): 17-27. doi:10.3969/j.issn.1009-086x.2022.04.003

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This paper briefly describes the principle of electromagnetic shielding， analyzes the current main shelter electromagnetic shielding technology， introduces the progress of shielding shelter structure design and material research， focuses on the research status and related electromagnetic shielding properties of electromagnetic shielding materials for shelter， and looks forward to the future development trend and application of electromagnetic shielding shelter technology.

Development and Implications of Intelligent Unmanned Combat Aerial Equipment by the US Army

Kang-sheng DONG, Wei-bo HU, Yan-ming SHEN, Shang-qin TANG

2022, 50(4): 28-37. doi:10.3969/j.issn.1009-086x.2022.04.004

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U.S. military unmanned aerial vehicles （UAVs） play an important role in military operations. There is an increasing trend for the total number of the UAVs and their intelligent level. To seize the high ground in the domain of the unmanned intelligent warfare， the US army are carrying out a series of new research projects. This paper analyzes the operational characteristics as well as the advantages and disadvantages of the U.S. military's in-service UAV equipment. According to the latest development of the intelligent technology in software and hardware， the projects of Carrier-Based Aerial-Refueling System， Loyal Wingman， Golden Horde， Project Maven， Advanced Battle Management System are analyzed in detail. The new characteristics and pattern of these intelligent military equipment are presented. The implications and suggestions for tackling the development of unmanned intelligent equipment are proposed in terms of the air combat theory， capabilities and techniques， as well as the equipment system.

Requirement Analysis of Army Intelligent Equipment Support Capacity Based on GQFD

Xiang-zheng JIANG, Tie-lin LIU, Shuai-bo CUI, Kai LI

2022, 50(4): 38-44. doi:10.3969/j.issn.1009-086x.2022.04.005

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For the current army equipment support capability demand analysis method cannot meet the needs of intelligent development with the problems of strong subjectivity and low reliability， the quality function deployment method based on grey correlation analysis is adopted. On the basis of "capacity" analysis， a demand quality house model based on grey relational analysis is established， and the importance order of the demand indicators of intelligent equipment support capability is obtained， which provides a theoretical basis for the construction and application of intelligent equipment support capabilities.

Development Status of End Defense Missile and Design Analysis of the Missile Family Architecture

Chao-qi LIU, Li-hua WEN

2022, 50(4): 45-51. doi:10.3969/j.issn.1009-086x.2022.04.006

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In response to the missile family development needs of terminal air defense missiles in systematic air defense operations， the development status and characteristics of terminal defense abroad are analyzed， and the requirements of the new generation of terminal air defense missiles is studied. According to the development characteristics and requirements of terminal air defense missile， the overall technical requirements of the terminal defense missile family are analyzed， and the architecture design method is proposed. The overall parameters of basic type terminal air defense missile， integral short range air defense missile and boost short-range air defense missile are designed and analyzed， and the boost missile family architecture shows the better overall parameters.

The Study on Adaptive Detonation Strategy for Anti-Air Missile Attacking Warships

Jia-wei ZHANG, Chuang WANG, Shao-bo LIU

2022, 50(4): 52-61. doi:10.3969/j.issn.1009-086x.2022.04.007

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In order to achieve effective destruction of key parts of the warship， such as bridge and vertical launcher， an adaptive detonation strategy for anti-air missile attacking warships is proposed. Taking the Arleigh Burke class destroyer as a typical target， based on the characteristics of the anti-air missile attacking warships， an adaptive detonation control model consisting of trigger initiation， distance initiation and delayed limited initiation is established by making full use of the information on the missile. The damage criterion of anti-air missile attacking warships is established， and the initiation conditions and damage effect， under different rendezvous condition are studied through simulation calculation， and the effectiveness of adaptive detonation strategy is verified， which provides technical support for expanding the anti-ship combat capability of anti-air missile and improving the efficiency of weapons.

Research on Midcourse Guidance for Intercepting HTV2 Based on Trajectory Tracking and Prediction

Xue-qi SUN, Rui ZHANG

2022, 50(4): 62-72. doi:10.3969/j.issn.1009-086x.2022.04.008

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Aiming at HTV2 （hypersonic technology vehicle 2） targets with high speed and high maneuverability， the midcourse guidance of interceptor missile using hit-to-kill intercept strategy is studied， and a midcourse guidance algorithm based on trajectory tracking and prediction is presented. An adaptive grid interactive multi-mode （AGIMM） filter is used to track the target trajectory stably. The least square method based on forgetting factor is used to predict the trajectory of the target， and the motion state at the predicted handover point is obtained. The target state variables at the predicted handover point are used as midcourse guidance constraint， and the optimal midcourse guidance law is calculated by Gaussian pseudo-spectral method. The interception simulation of HTV2 target is carried out using the proposed midcourse guidance algorithm， and the simulation results prove the effectiveness of the algorithm.

Simulation of Launch Safety Zone of Shipborne Missile Under High Sea Conditions

Xin-peng CHI, Wang-hui ZHENG

2022, 50(4): 73-83. doi:10.3969/j.issn.1009-086x.2022.04.009

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The ship borne missile is affected by the ship attitude and velocity during launch， which changes its attitude， position and velocity. Under the background of high sea conditions， in order to avoid the mutual interference between two missiles launched at intervals， the safety area of initial trajectory after launch is studied. According to the motion characteristics of vertical launch missile in the initial flight phase， the ballistic launch safety area model is established； the ballistic safety zone of two missiles at different launch times is defined. The model solves the problem of defining the launch safety area of high sea situation missile， and has practical engineering application value.

Research on IAMD Battle Command System（IBCS）of the US

Sen LI, Hai-lin TIAN, Gang WANG, Da-xi LI, Jing WU

2022, 50(4): 84-100. doi:10.3969/j.issn.1009-086x.2022.04.010

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Integrated air and missile defense battle command system（IBCS）is not only the core system to support the force transformation and operation-concept development of U.S. Air Defense Artillery（ADA）， but also an important platform for deep integration of multi-domain and multi-type air & missile defense combat elements. The base-line version of IBCS began to deliver ADA in 2022. Based on the previous general research， the system component， equipment function， association relationship and troop configuration of IBCS are analyzed. It is pointed out that the new disposition capability of engagement operations center（EOC）is "one-type equipment， multi-level command hierarchy adaptation； one set of software， multi-role and function configuration". Based on the type configuration analysis of EOC， the operational mode and characteristics of IBCS are discussed. The inspiration and suggestion are put forward based on the above research.

Research on Adaptive Frequency Selection Diversity in Multiple Antennas System

Bin-song SHEN

2022, 50(4): 101-106. doi:10.3969/j.issn.1009-086x.2022.04.011

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In order to improve the performance of multi-antenna troposcatter communication system， a multi-antenna adaptive frequency selection diversity method is proposed. By comparing and analyzing the receiving SNR distribution characteristics of different adaptive frequency selection diversity methods under multi-antenna system， the diversity method can obtain the best diversity performance and can be applied to multi-antenna troposcatter communication system. Simulation results show that the performance of the multi-antenna adaptive frequency selection diversity method is better than the existing diversity method and can effectively improve the performance of troposcatter communication system.

Design of High Combat Effectiveness Human-Machine System for Air Defense Anti-Missile Radar

Tao SUN, Qing-hua LONG, Yu-long CHAO, Bo DONG, Jun LUO

2022, 50(4): 107-115. doi:10.3969/j.issn.1009-086x.2022.04.012

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This paper discusses the differences of the emphasis of human-machine system design between complex information system and Internet products， how to transform functional requirements into design requirements， break through the traditional extensive design， and improve the human-machine coordination and human-machine interaction ability of air defense and anti-missile radar， and puts forward a effectiveness centered design idea and theory based on mission characteristics and timing sequence. This paper presents a new scientific design method for the key links affecting the combat effectiveness of human-machine system， such as human-machine function allocation， intelligent decision support， station division， information architecture of interactive interface and so on. The practice shows that the effectiveness centered design theory and method based on mission characteristics and timing sequence effectively improves the combat effectiveness of weapon equipment human-machine system. This method can effectively guide the human-machine system design of complex information system represented by air defense and anti-missile radar， and can be widely used for all kinds of human-machine systems with strong timeliness.

Comparison of Early Warning Detection Characteristics Between Hypersonic Cruise Missile and Cruise Missile

Jian-cheng ZHENG, Xian-si TAN, Zhi-guo QU, Wen-lin HE, Zhi-huai LI

2022, 50(4): 116-123. doi:10.3969/j.issn.1009-086x.2022.04.013

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In order to clarify a defensive party’s understanding of the threat of incoming hypersonic cruise missiles（HCMs） in near space and improve the existing missile defense strategy， the characteristics between HCM and cruise missile are compared and analyzed from the perspective of early warning system. By establishing target motion model， infrared detection model and radar detection model with moderate particle size， the influence of the cruising altitude and flying speed of the two kinds of targets on the ground-based early warning system and the infrared detectability are analyzed in detail and quantitatively. The results of comparative analysis show that the detection range of HCMs provided by the infrared detector is longer due to its stronger infrared radiation intensity. Although HCMs are faster than cruise missiles， the early warning time provided by the ground-based radar of HCMs with the same downrange is longer because of its higher altitude.

A Micro-Motion Feature Importance Evaluation Algorithm Based on Random Forest

Qing-yuan ZHAO, Chun-mao YE, Yao-bing LU

2022, 50(4): 124-131. doi:10.3969/j.issn.1009-086x.2022.04.014

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In order to reduce the redundancy in the micro-motion feature set of aerodynamic targets and reduce the feature dimensionality， random forest is introduced to evaluate the importance of multi-dimensional micro-motion features. The random forest algorithm and project implementation process are described， and 18 micro-motion features in the time domain， frequency domain and time-frequency domain are extracted. VHF band measured data are used to verify the feature importance evaluation algorithm based on random forest， and the influence of feature selection on the performance of tree classifiers including Fisher， support vector machine and decision tree classifier， as well as the influence of the number of radar coherent accumulation pulses on the feature importance evaluation are analyzed. For Fisher and support vector machine， with the increase of feature dimension， classification accuracy can be improved slightly. For decision trees， classification accuracy is only affected by features with higher importance score.

Research on Blind Source Separation in Subarray Domain Applied to Anti-Main Lobe Jamming Algorithm

Zhen-yu JIA, Hua-xing KUANG

2022, 50(4): 132-139. doi:10.3969/j.issn.1009-086x.2022.04.015

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The main lobe jamming suppression of array radar is a difficult problem in the field of radar anti-jamming. This paper proposes a blind source separation main lobe anti-jamming algorithm in sub-array domain based on joint approximate diagonalization of eigen-matrices（JADE）blind source separation. The algorithm provides lower complexity compared to the traditional omnidirectional array algorithm， especially for large arrays. The omnidirectional array is divided into subarray domain. A new blind source separation channel number pre-estimation method is designed on the basis of subarray domain using multiple signal classification（MUSIC） and constant false alarm rate （CFAR） to provide prior information for JADE. The separated signals are processed pulse compression and signal detection to achieve radar main lobe anti-jamming. Simulation analysis shows that the method can effectively demonstrate the separation of target signal and jamming signal， and the calculation amount is significantly reduced compared with the omnidirectional array， which has a certain engineering application prospects.

Design and Application of Health Management System for Missile Equipment

Dan-dan LIU, Yu-yan TANG, Yan-bin YUAN, Xiao-feng NI, Yun-jian JING

2022, 50(4): 140-147. doi:10.3969/j.issn.1009-086x.2022.04.016

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With the increase of the level of complexity， integration and intelligence of missile weapon system， health management technology， as a key enabling technology to improve equipment reliability， testability， maintainability and supportability， has gotten more and more attention and application. Based on the health management needs of the new generation missile weapon system， the design principle， structural framework， workflow and life cycle data management requirements of missile equipment health management system are introduced. The feasibility and effectiveness of the design method in the development of health management system are verified by taking certain equipment as an example.

Reliability Evaluation Method of Radar Equipment Based on Improved AHP-Entropy Weight Method

Yun ZHAI, Bing HU, Duan-yang SHI

2022, 50(4): 148-155. doi:10.3969/j.issn.1009-086x.2022.04.017

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In order to improve the scientific nature of index weighting in radar equipment reliability evaluation， in view of the problem of subjective weighting method relies too much on individual experience， and objective weighting method collects less data， resulting in inaccurate objective weighting results， the improved analytic hierarchy process （AHP） and entropy weight method are used to assign the indexes to the subjective and objective weights respectively. The least square method is used to couple the subjective and objective weights， and the Lagrange method is used to solve the model， which effectively avoids the limitation of single weight. The feasibility of the method is verified by an example.

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