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IASTED International Conference on Applied simulation and Modelling, ASM 2011

作者： Lan, Guo-Xing Ye, Feng Science and Technology on Complex Systems Simulation Laboratory Post Box. 9702#19 Beijing 100101 China

ISBN: (纸本)9780889868939

Optimization is one of the most important research contents of System of systems (SoS), and computer simulation technology is an effective means to resolving optimization problem. This paper makes further exploration of SoS description and optimization problem, simulation optimization and its development direction. The multilayer optimization to resolving optimization problem of system and hybrid optimization algorithm based on sensitivity analysis and genetic algorithm has proposed. They are used to offer a technological support for SoS optimization problem.

关键词： Sensitivity analysis

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Analysis of a "meta - Trade study" interpretation of decision-making with a value proposition for space programs

Analysis of a "meta - Trade study" interpretation of decisio...

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space 2006 Conference

作者： Rockower, Edward B. Lockheed Martin Space Systems Company Sunnyvale CA 94089 United States Advanced Technology Center Modeling Simulation and Information Science

ISBN: (纸本)1563478242

Tightening budgets and greater competition for funding are increasing the need to more completely, persuasively, and transparently value and market complex, and often exotic, space Programs. This is driving an expanding view of what's required in an engineering, economic, and political language of discourse. Words and phrases like holistic, future generations, new frontiers, vision, inspiring, and sustainable are increasingly important to encompass the full range of stakeholders, the full spectrum of societal needs and values, and the vastly differing awareness, sophistication, and priorities among stakeholders. There's a well-known saying in Sales, that "you sell the sizzle, not the steak". This is increasingly necessary to achieve widespread understanding, public buy-in, and sustainability. We consider how the components of a "value proposition" may be mapped to corresponding parts of the final report for a kind of "Meta - Trade Study" with respect to allocation of Society's resources among alternative objectives and programs. We investigate how that viewpoint helps us to understand, quantify and communicate a "Value Proposition for space". We also point out limitations of this perspective, hence areas that must be extended, and suggest how this may be done. Copyright © 2006 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： space research

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Research on vulnerability of space information network based on interdependent networks 3

Research on vulnerability of space information network based...

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3rd IEEE International Conference on Data science in Cyberspace, DSC 2018

作者： Zhao, Zhongwen Li, Zhangyuan Guo, Huanghuang Yang, Miaoben Space Engineering University Science and Technology On Complex Electronic System Simulation Laboratory Beijing China 63710 troops Taiyuan China

ISBN: (纸本)9781538642108

With the development and growing applications of information technology, the coupling and dependency of space information network are becoming more and more intense. In this paper, the vulnerability of space information network coupled with the communication network and function network is studied. Aiming at the shortage of traditional attack model, we put forward physical-attack and cyber-attack and set up different attack strategies such as random attack, targeted attack and gray attack. The concept of combat component is proposed and the cascading failure algorithm is given. The simulation shows that compared with traditional single network model, the interdependent network model based on the combat component can more accurately reflect the cascading failure mechanism of the space information network. This research results can provide guidance for space information network security research and invulnerability design. © 2018 IEEE.

关键词： Network security

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A Solution Analysis of U.S. Weapon Equipment systems-of-systems Development and Application 7

A Solution Analysis of U.S. Weapon Equipment Systems-of-Syst...

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7th International Conference on Information science and Control Engineering, ICISCE 2020

作者： Lin, Menglong Yi, Shuanghui Zhang, Mengmeng Shu, Zhen National University of Defense Technology Science and Technology on Information Systems Engineering Laboratory Changsha China National Key Laboratory for Complex System Simulation Beijing China

ISBN: (纸本)9781728164069

In recent years, the development and deployment of the U.S. weapon equipment systems-of-systems (SoS) have yielded rich research results. However, there are still large gaps in the SoS development, joint testing, and design and acquisition of our own equipment SoS. The barriers of these steps have not yet been opened up. This article mainly analyzes the solutions of the U.S. weapon equipment SoS from three aspects, such as capability-based requirement generation and architecture design technology, interconnected-oriented integration test technology, and weapon equipment design and acquisition technology based on complex adaptive systems. We explore key technologies involved in order to form an overall understanding and explore related research approaches. © 2020 IEEE.

关键词： System of systems

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A Numerical Calculation Algorithm of the Inclination Function Based on the Representation of SO(3) Group

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 137-148页

作者： Yu-xiao Wei Wen-lin Tang Department of Geophysics School of Geology Engineering and GeomaticsChang’An UniversityXi’an710064China Key Laboratory of Electronics and Information Technology for Space Systems National Space Science CenterChinese Academy of SciencesBeijing100190China

In the determination of the Earth gravity field in satellite geodesy, the inclination functions represent the projection of data observed along the orbital plane of a satellite orbit into the sphere in the terrestial reference frame. The inclination functions in this work is studied from a group theoretical perspective. The inclination functions are proved to generate a representation of the SO(3) group. An orthogonal relation of the inclination functions is derived and some recurrence relations for the inclination functions are given, based on which an algorithm to calculate the inclination functions is proposed.

关键词： SO(3)group inclination function satellite geodesy representation of SO(3)

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A two-stage allocation optimization in static load balancing of HLA distributed simulation

A two-stage allocation optimization in static load balancing...

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International Conference on Cyberspace technology, CCT 2013

作者： Ban, Xiaojuan Gan, Bin Wu, Ping School of Computer and Communication Engineering of University of Science and Technology Beijing Beijing 100083 China Science and Technology on Complex Systems Simulation Laboratory Beijing 100012 China

ISBN: (纸本)9781849198011

The load balancing problem is becoming the main technical obstacle in HLA distributed simulation development with the increasing scale of distributed simulation system. The solution of task-federate mapping and federate-processor mapping used to be determined based on experiences and the entity is taken as a task granularity in simulations in order to simplify the model in previous studies. Neither the experience methods nor the previous studies could solve the huge communication overhead or load imbalance problem effectively in large scale distributed simulation. The static load balancing optimization of HLA distributed simulation is divided into task-federate mapping and federate-processor mapping, and a two-stage mapping allocation optimization method is proposed in this paper. Decreasing communication overhead of the system is the main mission in the taskfederate mapping stage and the load balancing is studied in the federate allocation stage. The effectiveness of the proposed method, which developed a new direction for static load balancing distribution optimization in distributed simulations, is verified with experiments.

关键词： Mapping

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Meter-Scale Thin-Walled Structure with Lattice Infill for Fuel Tank Supporting Component of Satellite:Multiscale Design and Experimental Verification

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Computer Modeling in Engineering & sciences 2024年第1期138卷 201-220页

作者： Xiaoyu Zhang Huizhong Zeng Shaohui Zhang Yan Zhang Mi Xiao Liping Liu Hao Zhou Hongyou Chai Liang Gao Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of TechnologyBeijing100081China Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications Beijing Institute of Spacecraft System EngineeringChina Academy of Space TechnologyBeijing100094China Key Laboratory of Metallurgical Equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China

Lightweight thin-walled structures with lattice infill are widely desired in satellite for their high stiffness-to-weight ratio and superior buckling strength resulting fromthe sandwich *** structures can be fabricated bymetallic additive manufacturing technique,such as selective laser melting(SLM).However,the maximum dimensions of actual structures are usually in a sub-meter scale,which results in restrictions on their appliance in aerospace and other *** this work,a meter-scale thin-walled structure with lattice infill is designed for the fuel tank supporting component of the satellite by integrating a self-supporting lattice into the thickness optimization of the *** designed structure is fabricated by SLM of AlSi10Mg and cold metal transfer welding ***-static mechanical tests and vibration tests are both conducted to verify the mechanical strength of the designed large-scale lattice thin-walled *** experimental results indicate that themeter-scale thin-walled structure with lattice infill could meet the dimension and lightweight requirements of most spacecrafts.

关键词： Thin-walled structure lattice infill supporting component selective laser melting satellite

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RBF Adaptive Sliding Control for Five-axis Flexible Satellite 34

RBF Adaptive Sliding Control for Five-axis Flexible Satellit...

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第三十四届中国控制会议

作者： MA Zheng WU Yunjie DONG Xiaomeng State Key Laboratory of Virtual Reality Technology and Systems Beihang University School of Automation Science and Electrical Engineering Beihang University Science and Technology on Aircraft Control Laboratory Qian Xuesen Laboratory of Space Technology CAST

ISBN: (纸本)9781467374439

With consideration of the flexible attachment effect, a robust sliding mode control method is proposed to realize RBF optimization of 3-DOF satellite with 2-DOF load. RBF neural network's approximation characteristic enables us to estimate the nonlinear function of satellite dynamics equation, furthermore, to adjust the sliding mode control law. Meanwhile, adaptive law is adopted to optimize the weights of neural network, so that satellite attitude and load attitude reach the expectation. simulation results reveal that, this method far surpass traditional control method in rapidity, robustness and accuracy. Moreover, it's timeliness values much during practical application.

关键词： flexible attachment,five-axis satellite model,adaptive RBF neural network,sliding mode variable structure

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Fusion of panchromatic and multispectral images via morphological operator and improved PCNN in mixed multiscale domain 10

Fusion of panchromatic and multispectral images via morpholo...

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10th IAPR Workshop on Pattern Recognition in Remote Sensing, PRRS 2018

作者： Jiao, Jiao Lingda, Wu Department of Graduate Management Space Engineering University Beijing China Simulation Laboratory Space Engineering University Science and Technology on Complex Electronic System Beijing China

ISBN: (纸本)9781538684795

In order to effectively combine the spectral information of the multispectral (MS) image with the spatial details of the panchromatic (PAN) image and improve the fusion quality, a fusion method based on morphological operator and improved pulse coupled neural network (PCNN) in mixed multi-scale (MM) domain is proposed. Firstly, the MS and PAN images are decomposed by nonsubsampled shearlet transform (NSST) to low- and high-frequency coefficients, respectively;secondly, morphological filter-based intensity modulation (MFIM) technology and stationary wavelet transform (SWT) are applied to the fusion of the low-frequency coefficients;an improved PCNN model is employed to the fusion of the high-frequency coefficients;thirdly, the final coefficients are reconstructed with inverse NSST. The experimental results on QuickBird satellite demonstrate that the proposed method is superior to five other kinds of traditional and popular methods: HIS, PCA, SWT, NSCT-PCNN and NSST-PCNN. The proposed method can improve the spatial resolution effectively while maintaining the spectral information well. The experimental results show that the proposed method outperforms the other methods in visual effect and objective evaluations. © 2018 IEEE.

关键词： Image fusion

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Machine Learning Security Analysis Framework Based on Threat Matrix 8

Machine Learning Security Analysis Framework Based on Threat...

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8th International Conference on Data science in Cyberspace, DSC 2023

作者： Li, Hu Ma, Qiongmin Zhang, Ming Kuang, Xiaohui National Key Laboratory of Science and Technology on Information System Security Beijing China National Key Laboratory for Complex Systems Simulation Beijing China

ISBN: (纸本)9798350331035

Machine Learning and Artificial Intelligence technology accelerates technological progress and promotes social development, but also brings many security problems. Machine learning models may be affected, deceived, controlled or destroyed at different stages, e.g. training and inference, which may lead to serious consequences. In view of the main stages of the life cycle of machine learning, we summarizes the related attack and defense technologies based on threat matrix, makes a comprehensive and systematic analysis on the security issues of machine learning, and puts forward several security protection suggestions for intelligent information systems. © 2023 IEEE.

关键词： Artificial Intelligence Machine Learning Security Analysis Threat Matrix

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