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Beam tracking method based on reconfigurable intelligent surface for obstructed communication

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Chinese Journal of Aeronautics 2022年第8期35卷 158-167页

作者： Hongyao LI jianxiang xi Ming HE xicong WANG School of Missile Engineering Rocket Force University of EngineeringXi’an 710025China

This paper proposes a new reconfigurable intelligent surface based three-dimensional beam tracking method to solve the beam tracking problems for the unmanned aerial vehicle with obstacles in communication *** proposed beam tracking method can not only regulate the reconfigurable intelligent surfaces to achieve the beam tracking of the obstructed communications,but also optimize the transmission efficiency of the ***,a reconfigurable intelligent surface is proposed,which can correlate the transmission signals by adjusting the phaseshift ***,a new communication channel is constructed according to the reconfigurable intelligent surface,which consists of two *** first one is the channel between the unmanned aerial vehicle and the reconfigurable intelligent surface,the other is the channel between the reconfigurable intelligent surface and the ground base *** that the transmission performance of the communications can be optimized by adjusting the phase shift of each uniform linear array on the reconfigurable intelligent ***,a new beam tracking method for the unmanned aerial vehicle with obstructed communications is proposed on the basis of the reconfigurable intelligent *** proposing the mixed genetic algorithm,the estimation accuracy of the azimuth and elevation angles is improved to enhance the performance of the beam ***,the simulations are provided to verify the effectiveness of the proposed three-dimensional beam tracking method with reconfigurable intelligent surface.

关键词： Beam tracking Obstacle Phase shift Reconfigurable intelligent surface Unmanned aerial vehicle

Formation control for networked multiagent systems with a minimum energy constraint

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Chinese Journal of Aeronautics 2023年第1期36卷 342-355页

作者： Junlong LI jianxiang xi Ming HE Bing LI Department of Physics Lüliang UniversityLüliang 033001China School of Missile Engineering Rocket Force University of EngineeringXi’an 710025China First Military Representative Office of the Rocket Army Equipment Department in xi’an Xi’an 710025China

Minimum-energy formation achievement problems for networked multiagent systems are investigated,where information networks with leaderless and leader-follower structures are respectively addressed and information networks are randomly *** critical feature of this work is that the energy constraint is minimum in the sense of the linear matrix inequality,but limited-budget control and guaranteed-cost control cannot realize a minimum-energy ***,the leaderless minimum-energy formation control problem is converted into an asymp-totic stability one via a nonsingular transformation and state space decomposition,and based on linear matrix inequality techniques,sufficient conditions for analysis and design of leaderless minimum-energy formation achievement are proposed,respectively,which can be solved by the generalized eigenvalue ***,main results of minimum-energy formation achievement of leaderless networked multiagent systems are extended leader-follower networked multiagent systems,where the asymmetric property of the leader-follower information network is well dealt with by two nonsingular ***,two simulation examples are shown to verify the main results for minimum-energy formation achievements of leaderless and leader-follower networked multiagent systems,respectively.

关键词： Energy constraint Formation Minimum energy consump-tion Networked control systems Switching networks

Limited-Budget Consensus Design and Analysis for Multiagent Systems With Switching Topologies and Intermittent Communications

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IEEE/CAA Journal of Automatica Sinica 2021年第10期8卷 1724-1736页

作者： Le Wang jianxiang xi Bo Hou Guangbin Liu Force University of Engineering Xi’an 710025China

This paper investigates limited-budget consensus design and analysis problems of general high-order multiagent systems with intermittent communications and switching *** main contribution of this paper is that the tradeoff design between the energy consumption and the consensus performance can be realized while achieving leaderless or leaderfollowing consensus,under constraints of limited budgets and intermittent ***,a new intermittent limitedbudget consensus control protocol with a practical trade-off design index is proposed,where the total budget of the whole multiagent system is ***,leaderless limited-budget consensus design and analysis criteria are derived,in which the matrix variables of linear matrix inequalities are determined according to the total budget and the practical trade-off design ***,an explicit formulation of the consensus function is derived to describe the consensus state trajectory of the whole ***,a new two-stage transformation strategy is utilized for leader-following cases,by which the dynamics decomposition of leaderless and leader-following cases can be converted into a unified framework,and sufficient conditions of the leader-following limited-budget consensus design and analysis are determined via those of the leaderless ***,numerical simulations are given to illustrate theoretical results.

关键词： Intermittent communication limited-budget consensus multiagent system switching topology

Event-triggered finite-time consensualization for multiagent networks with limited energy budgets

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Science China(Information Sciences) 2020年第11期63卷 318-320页

作者： Le WANG jianxiang xi Dangbo DU Guangbin LIU Department of Automation Rocket Force University of Engineering

Dear editor,Recently, cooperative control has received considerable attention from researchers because of the noteworthy research results regarding cooperative control across multiple fields, including distributed computation for large-scale data, formation control of multiple unmanned aerial vehicles, and wireless communications [1–4].

关键词： Event-triggered control consensualization finite time limited energy budget multi-agent network

新信息时代对军队院校教育教学改革的影响及实践策略分析

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高教学刊 2024年第32期10卷 26-29页

作者：蔡光斌席建祥鹿兆南黄华郑惠火箭军工程大学西安710000

该文结合军队院校教育特点,探讨新信息时代对军队院校教育教学改革的全面影响,并提出相应的实践策略。该文首先分析军队院校教育教学的特点,并对新信息时代对教学影响的具体表现,提出加强顶层设计、提升教师信息素养、深化课程教学改革... 详细信息

该文结合军队院校教育特点,探讨新信息时代对军队院校教育教学改革的全面影响,并提出相应的实践策略。该文首先分析军队院校教育教学的特点,并对新信息时代对教学影响的具体表现,提出加强顶层设计、提升教师信息素养、深化课程教学改革、加强教育技术研发与应用,以及注重实践探索与经验总结等实践策略。通过有效实施这些策略,可以充分利用新信息时代的优势,推动军队教育教学改革的深入发展,为培养更多适应新信息时代下部队发展需求的高素质人才作出贡献。

关键词：新信息时代军队院校教育教学改革教学模式实践策略

Synchronization analysis of linear complex networks with time delays

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Synchronization analysis of linear complex networks with tim...

第26届中国控制与决策会议

作者： Li Hailong xi jianxiang Song Haisong Cao Yaoqin xi'an Research Inst.of High-tech

ISBN: (纸本)9781479937066

Synchronization of high-order discrete-time complex networks with time-varying delays and undirected communication topologies are investigated. Firstly, synchronization problems are converted into asymptotic stability ones, and the necessary and sufficient conditions for synchronization are presented. Based on the linear matrix inequality（LMI）, sufficient conditions for synchronization are proposed. Then, an explicit expression of the synchronization function is given. Finally, numerical simulations are shown to demonstrate theoretical results.

关键词： Synchronization time delay complex network synchronization function

γ-adaptive consensus control for multi-agent systems with adjustable convergence speed

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γ-adaptive consensus control for multi-agent systems with a...

第36届中国控制会议

作者： Guanghui Shi jianxiang xi Zhiliang Fan Tang Zheng High-Tech Institute of xi’an

Convergence speed of the multi-agent system is usually determined by the algebraic connectivity of the communication *** changing the network topology or getting more state information,the algebraic connectivity can increase,but it is usually fixed and may be very small,which means that it cannot be adjusted flexibly according to the requirements of the convergence *** order to overcome this problem,we investigate the convergence speed adjustment problem of multi-agent ***,we propose a new y-adaptive consensus protocol,where the weights of the edges can adap tively change according to the status difference between neighboring *** this protocol,not only the convergence time is decreased,but also the convergence speed can be quantitatively adjusted through changing the value of γ ***,a sufficient condition for consensus is given,and the adjustable feature of the convergence speed is ***,numerical simulations are presented to illustrate theoretical results.

关键词： Multi-agent systems consensus adaptive convergence speed

Strapdown Scene Matching Location Approach for Aircraft with Attitude Variances

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Strapdown Scene Matching Location Approach for Aircraft with...

第26届中国控制与决策会议

作者： xiaogang Yang jianxiang xi Jianyong Wang Shiwei Chen High-Tech Institute of xi’an

ISBN: (纸本)9781479937097

Geometric rectification problems of the strapdown scene matching for aircraft with attitude variances are investigated. Firstly, by analyzing the main factors causing geometric distortion in the process of real-time image capturing, two coordinates system are established, the real-time image distortion is classified, and the distortion mathematic models are proposed. Then, according to the altitude and attitude angle information of the aircraft camera, the geometric rectification of the real-time image is realized, where the center point error between the realtime image and original one and the size of the real-time image can also be determined. Furthermore, a strapdown scene matching approach is shown for aircraft with attitude variances. Finally, a simulation example is given to demonstrate the validity and the efficiency of the proposed approach.

关键词： Scene matching mathematic model geometric rectification matching approach

High-precision Image Mosaic Algorithm Based on Adaptive Homography Transform

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High-precision Image Mosaic Algorithm Based on Adaptive Homo...

第40届中国控制会议

作者： CHEN Tong GUO Jianfeng xiE Xueli xi jianxiang Rocket Force University of Engineering

The Unmanned Aerial Vehicle（UAV） image mosaic is a research hotspot of digital image processing in recent years,which has extensively application *** existing algorithms are sensitive to aerial images mosaic with large scale and perspective differences,and have the disadvantages of poor accuracy and image distortion,which can not obtain the global optimal mosaic *** aerial images mosaic method based on the adaptive homography matrix is proposed to realize highprecision mosaic of multi-scale and multi-view aerial *** feature points of different UAVs aerial images are constructed by the Speeded Up Robust Features（SURF） *** Library for Approximate Nearest Neighbors（FLANN） is used to realize rough matching of feature *** Random Sample Consensus（RANSAC） algorithm is used to eliminate the mismatched points to achieve the fine matching,and the position-dependent adaptive homography transform model is constructed to complete ***,the weighted average method is implemented to complete the fusion for the purpose of seamless image *** performance of the mosaicing algorithm based on adaptive homography transform is verified on a practical aerial dataset,and the results are compared with the related *** results show that the proposed algorithm satisfies the requirements of high-precision mosaic,and has high efficiency.

关键词： UAV image mosaic Adaptive homography transformation Multi-scale and multi-view Feature matching Global optimization