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2014 International Conference on Information and Communications Technologies (ICT 2014)

作者： Tao Wu Haixin Zheng Di Yan Shaolin Liu Science and Technology on Complex Electronic System Simulation Laboratory Academy of Equipment Beijing China Department of Optical and Electrical Equipment Academy of Equipment Beijing China Company of Postgraduate Management Academy of Equipment Beijing China School of Information and Communication Enginneering Beijing University of Posts and Telecommunications China

ISBN: (纸本)9781634392785

When the traditional SNR estimation algorithm based on singular value decomposition (SVD) is applied to the digital data analysis of spaceflight TT&C system, problem of large deviation arises. This paper analyzes the limitations of SVD, and proposes a modified singular value decomposition (MSVD) SNR estimation algorithm. Before estimating SNR by use of SVD, MSVD does some processing to whiten noise, such as band-pass, down-sampling, and up-sampling. The simulation results show that this algorithm can, within a large range, accurately estimate the actually received SNR, effectively improving the application scope of traditional algorithms.

关键词： Blind estimation PSK SNR SVD

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Anti-windup Design for Active Disturbance Rejection Control

Anti-windup Design for Active Disturbance Rejection Control

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第三十三届中国控制会议

作者： Xiongjun Wu Jiaoni Pang Tao Yang The 802 Institute of Shanghai Academy of Space Flight Technology The Eighth Academy of China Aerospace Science and Technology Corporation Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information ProcessingMinistry of Education of China ACCESS Linnaeus Centre School of Electrical Engineering Royal Institute of Technology

ISBN: (纸本)9781479947249

An anti-windup compensate algorithm for active disturbance rejection mechanism is proposed in this paper. This paradigm extends the traditional anti-windup scheme to the Active Disturbance Rejection Control(ADRC) mechanism, to deal with the input saturation nonlinearity and meanwhile reject the disturbance automatically by using Extended State Observer(ESO). The output of anti-windup compensator is treated as a part of unknown disturbances and is introduced into the ESO, which can online observe both internal and external disturbances(parameter uncertainties and model mismatches). The controller input is yielded by using a nonlinear feedback combination, and it is used to compensate the integrator windup caused by the saturation nonlinearity element. On the other hand, in order to determine the parameters of the ESO and the anti-windup compensator feedback gain, the L2 gain is adopted. The effectiveness and the robustness against model and parameter uncertainties of the proposed method is verified by an example of the seeker platform.

关键词： Actuator saturation,Anti-windup design,Active disturbance rejection,Extended State Observer(ESO),Tracking Differentiator

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Optimization of GM (1,1) model based on bilevel programming

Optimization of GM (1,1) model based on bilevel programming

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2013 5th International Conference on Intelligent Human-Machine systems and Cybernetics, IHMSC 2013

作者： Chen, Bolin Ke, Hongfa School of Optoelectronic Engineering Changchun University of Science and Technology Changchun China Laboratory of Complex Electronic System Simulation Academy of Equipment Beijing China

ISBN: (纸本)9780769550114

GM (1, 1) is a biased grey exponential model, whose accuracy depends on the structure of background values and the selection of original conditions. Current literatures optimized GM (1, 1) models just by optimizing background values or original conditions separately, or by combining them jointly. However, these methods all ignored the accumulative errors between the optimization of background value and the optimization of original condition. Besides, they can not reflect the dynamic characteristics of the data sequence. Considering the accumulation and spread of the error between the optimization of background value and that of original condition, a new optimized model of GM (1, 1) Based on bilevel programming is put forward. The bilevel programming model is set up on the basis of two objective functions which minimize the square sum of relative errors. Various weights are optimized for individual data sequence. Furthermore, a validity analysis method Based on the grey relational degree between simulation data sequence and the original one is introduced. The simulation results show that the proposed model has extremely high fitting accuracy regardless of the scale of development coefficient. Both of approachability and similarity of the simulation data sequence to the original one reach the best. © 2013 IEEE.

关键词： Errors

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Research on modeling and simulation of complex adaptive systems based on multi-agent

Research on modeling and simulation of complex adaptive syst...

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3rd International Conference on Materials science and Information technology, MSIT 2013

作者： Liao, Shan Liang Lai, Jia Zhe Company of Postgraduate Management The Academy of Equipment Beijing China Science and Technology on Complex Electronic System Simulation Laboratory The Academy of Equipment Beijing China

ISBN: (纸本)9783037857700

With the rapid development of complex adaptive systems, traditional modeling and simulation methods have been unable to meet the need of accurate modeling of complex adaptive systems. Therefore, we need a way to accurately describe the characteristics of complex adaptive systems modeling and simulation. Multi-Agent modeling and simulation methods focus on the study of the interaction between multiple subjects. It is an effective way to study complex adaptive system. This paper analyzes the multi-agent modeling process, sets up a rumor spreading model of a small social network through multi-agent modeling and simulation methods,. The simulation results verify the correctness and accuracy of the model. © (2013) Trans Tech Publications, Switzerland.

关键词： Adaptive systems

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Multiuser interference suppression for the uplink of interleaved MIMO OFDMA

Multiuser interference suppression for the uplink of interle...

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2013 International Conference on Communications, Circuits and systems, ICCCAS 2013

作者： Han, Wei Wang, Gang System Simulation Department Zhong Xing Telecommunication Equipment Corporation Shanghai 211203 China National Key Laboratory of Science and Technology on Communications University of Electronic Science and Technology of China Chengdu 610054 China

ISBN: (纸本)9781479930517

In the uplink of multiple-input multiple-output (MIMO) orthogonal frequency division multiple access (OFDMA) systems, multiuser interference (MUI) occurs due to carrier frequency offsets (CFOs). In this paper, a novel scheme is presented to suppress MUI for the interleaved MIMO OFDMA system. The first stage is to compensate the multiple CFOs, which is based on a calculation of optimum CFO correction value maximizing the average signal-to-interference ratio (SIR). And the second stage uses minimum mean square error (MMSE) frequency domain equalizer (FDE), considering the residual MUI as additive noise, to further improve the systems' performance. simulation results show that the proposed scheme exhibits a significant improvement over conventional scheme. © 2013 IEEE.

关键词： Frequency division multiple access

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Agent-based simulation method of complex system

Agent-based simulation method of complex system

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2013 International Conference on Vehicle and Mechanical Engineering and Information technology, VMEIT 2013

作者： Lai, Jia Zhe Liao, Shan Liang Science and Technology on Complex Electronic System Simulation Laboratory The Academy of Equipment Beijing 101416 China Company of Postgraduate Management The Academy of Equipment Beijing 101416 China

ISBN: (纸本)9783037858202

In this paper a method is introduced to simulate the Complex system by ABMS. space system can be considered a complex system that is composed of many satellites,which need a powerful and flexible method to study, MAS structure of space system is gived by analyzing its hiberarchy, by studying the navigation agent, a typical agent structure is gived. introduce the RepastHPC agent platform using MPI, orbit forecasting method is studying, Finally, we realize the MAS simulation and run it on parallel cluster. © (2013) Trans Tech Publications, Switzerland.

关键词： Multi agent systems

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The way to analysis of spatial association

The way to analysis of spatial association

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2013 International Conference on Vehicle and Mechanical Engineering and Information technology, VMEIT 2013

作者： Guo, Jing Liu, De Sheng Guo, Qin Science and Technology on Complex Electronic System Simulation Laboratory The Academy of Equipment Huairou Beijing China School of Humanities and Social Sciences National University of Defense Technology Changsha Hunan China

ISBN: (纸本)9783037858202

Following the continual development and maturation of the technology of association analysis, it can be used to mine the relation between spatial data. The paper introduced definition and classification of association analysis technology. It analyses the spatial Association from physics layer, link layer and act layer. Based on above, it provides the process of association analysis about spatial data. © (2013) Trans Tech Publications, Switzerland.

关键词： Data mining

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Research on hall for workshop of meta-synthetic engineering for demonstration on weapon equipment system of system

Research on hall for workshop of meta-synthetic engineering ...

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3rd International Conference on Materials science and Information technology, MSIT 2013

ISBN: (纸本)9783037857700

Aimed to the complexity of and weapon equipment 'system of system'(SoS) and demonstration process, we demonstrated the building needs of hall for workshop of meta-synthetic engineering(HWME) for demonstration on weapon equipment SoS from the angle of function and application. Based on the process of demonstration, the framework of HWME for demonstration of weapon equipment system was built. Based on the mechanism of message transferring, arithmetic and mutual ability, the discussion system of weapon equipment SoS was designed by intelligent decision, group decision, parallel engineering. At last, the paper gave the mutual relation on each composing of the discussion system. © (2013) Trans Tech Publications, Switzerland.

关键词： Demonstrations

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Observations of Arctic sea ice and river discharge with multiple satellite sensors

Observations of Arctic sea ice and river discharge with mult...

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General Assembly and Scientific Symposium, URSI

作者： S. V. Nghiem D. K. Hall I. G. Rigor P. Li G. Neumann Jet Propulsion Laboratory California Institute of Technology Pasadena California USA Joint Institute for Regional Earth System Science and Engineering University of California at Los Anaeles Los Angeles CA USA NASA Goddard Space Flight Center Greenbelt Maryland USA University of Washington Seattle Washington USA

Summary form only given. Arctic sea ice has declined rapidly. A record low of sea ice extent occurred in summer 2012 as observed over three decades of satellite data. The regime of the Arctic ice cover has shifted to a new state dominated by seasonal sea ice, as perennial sea ice has diminished drastically. Changes in the distribution of sea ice classes can precondition summer melt, alter the surface albedo, upset the Bowen ratio, and impact atmospheric photochemical processes. To investigate Arctic sea ice, environmental, and chemical changes, we conducted the Bromine, Ozone, and Mercury Experiment (BROMEX) around Barrow, Alaska, in March-April 2012, together with continuous measurements through the present. We used satellite active microwave scatterometer (AMS) and passive microwave radiometer (PMR) to observe the change in sea ice extent (SIE). A problem for sea ice observations in summer is that surface melt can impact PMR signatures of sea ice, causing large uncertainties in the measurement of SIE. We developed an AMS algorithm to determine SIE, primarily based on a quadruplet combination of relative AMS values rather than the absolute magnitudes of the signature and thus improving SIE accuracy. Then we took the SIE product from AMS in 2000-2009 to calibrate PMR results and reconstruct a SIE time series over three decades (1979-2013). To monitor sea surface temperature change caused by river discharge, we obtain results from two different algorithms using data acquired from the Moderate-resolution Imaging Spectroradiometer (MODIS) instruments that are currently in orbit on both the Terra and Aqua satellites, launched in 1999 and 2002, respectively. We present results from spring-summer 2012 over the Beaufort Sea where warm waters from the Mackenzie River surged onto the sea surface layer thereby accelerating sea ice melt. Additionally, we estimated the total annual heating power carried by 72 rivers into the Arctic Ocean. We found that Arctic rivers could provi

关键词： Sea ice Arctic Rivers Satellites Ocean temperature Satellite broadcasting Sea surface

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An Architectural Approach for Capability Mapping and Gap Analysis

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Journal of systems science and Information 2013年第1期1卷 86-96页

作者： Kewei YANG Bingfeng GE Qingsong ZHAO Jiang JIANG Science and Technology on Complex Systems Simulation Laboratory National University of Defense Technology College of Information System and Management

To cope with the increasing complexity and constantly changing capability requirements of system-of-systems, an architectural approach for capability mapping and gap analysis is ***, a more specific architecture framework is presented. Secondly, on the basis of the analysis of the semantic relationships between constituent architecture data elements, a capability mapping approach is proposed to manage the relations between capabilities and systems based on the mapping matrixes representing associations of core entities. Then, a four-step capability mapping process for the mapping from capabilities to systems is suggested. Moreover, the capability gap analysis on how to identify and fill the capability gaps is also studied. Finally, an example of specific Net-Centric Warfare mission of Precision Engagement is used to illustrate the feasibility of the approach.

关键词： system-of-systems capability architecture description mapping matrixes core entities gap analysis

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