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检索条件"机构=Science and Technology on Space System Simulation Laboratory"

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An analysis method for contribution degree of C4ISR system based on operational effectiveness

An analysis method for contribution degree of C4ISR system b...

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IASTED International Conference on Modelling and simulation, MS 2012

作者： Yu, Qin-Zhang Zhang, Ying-Chao Hu, Run-Tao Shen, Zhi-Ming Zhang, Jing Beijing Institute of System Engineering Science and Technology on Complex Systems Simulation Laboratory Beijing China

ISBN: (纸本)9780889869264

C4ISR system is the multiplicator of system of Armament systems (SoAS). An analysis method for Contribution Degree of C4ISR system is proposed in the paper. Firstly, Overall-Effect based evaluation method for operational effectiveness of SoAS is introduced. Secondly, Contribution Degree of C4ISR system is defined and experiment flow based on exploratory simulation is designed. On this basis, an analysis method for Contribution Degree of C4ISR system is put forward. Finally, a simulation experiment is executed to prove the effectiveness of the method.

关键词： C4ISR system Contribution Degree Analysis Method Operational Effectiveness Multiplying circuits simulation test evaluation method armament WWOX gene

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Data-driven diagnosing for unanticipated fault by a general process model

Data-driven diagnosing for unanticipated fault by a general ...

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Chinese Automation Congress (CAC)

作者： Jiongqi Wang Zhangming He Dayi Wang Haiyin Zhou Department of Mathematics and Systern Science National University of Defense Technology Changsha Hunan PRC Beijing Institute of Control Engineering China Academy of Space Technology Beijing PRC Department of Mathematics and System Science National University of Defense Technology Changsha Hunan PRC State Key Laboratory of Astronautics Dynamics Xi'an Shanxi PRC

The improvement of unanticipated fault detection and diagnosis (UFDD) capability is a difficult point, and is also a tendency for research and application. In this paper, a general process model (GPM) for unanticipated fault diagnosis is established. And combined with the characteristics of monitoring data, the corresponding diagnosis methods are researched. The model and the methods are used for online unanticipated fault detection, isolation and recognition. The GPM for the unanticipated fault diagnosis is designed, by adopting a three-layer progressive structure, which is comprised of an inherent detection layer (IDL), an unanticipated isolation layer (UIL) and an unanticipated recognition layer (URL). Several key problems in the GPM are analyzed, including the establishment and evaluation of detection statistics, the extraction of fault feature direction, and the design of fault isolation criterion and the calculation of contribution factor. The proposed model and methods are driven by pure data and they can detect and diagnose the unanticipated fault. The proposed approach is evaluated by using an example of a satellite's attitude control system, and excellent results have been obtained.

关键词： Fault detection Monitoring Mathematical model Fault diagnosis Data models Testing Attitude control

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Multiple Anti-windup Loops under Multiple Activations:Dynamic Case to Enlarge Domain of Attraction

Multiple Anti-windup Loops under Multiple Activations:Dynami...

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第三十二届中国控制会议

作者： Xiongjun Wu Ziyang Meng 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 Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China ACCESS Linnaeus Centre School of Electrical EngineeringRoyal Institute of Technology

ISBN: (纸本)9781479900305

A multiple anti-windup loops under multiple dynamic activations strategy is proposed to enlarge the domain of attraction. This work is parallel to the multiple activation case with static *** traditional anti-windup compensator is activated immediately as the saturation *** was shown recently that,by delaying the activation of the anti-windup mechanism to a certain level,the performance can be improved for the closed-loop *** was further shown that better performance can be obtained by activating an anti-windup mechanism in anticipation of actuator saturation,in comparison with the delayed activation *** paper considers the anti-windup design problem of enlarging domain of attraction under a dynamic multiple activation *** this multiple activation scheme,the anticipatory,delayed and immediate activation mechanism is incorporated in the same framework simultaneously.A furthermore significant performance improvements over both the immediate and delayed activation schemes can be *** proposed dynamic multiple activation scheme established a unified anti-windup framework and can be readily extended to the traditional immediate,delayed and anticipatory activation anti-windup mechanisms.

关键词： Anti-windup dynamic compensator domain of attraction multiple activations

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Multiple Anti-windup Loops under Multiple Static Activations:Enlargement of the Domain of Attraction

Multiple Anti-windup Loops under Multiple Static Activations...

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第三十二届中国控制会议

ISBN: (纸本)9781479900305

Anti-windup design is an intuitive and efficient way to deal with input saturation *** the classic antiwindup design,the compensator is set to be activated immediately as the control signal saturates the *** important innovation in the anti-windup activation mechanism is to delay the activation of the anti-windup mechanism until the saturation reaches to a certain severity which led to a performance improvement of the resulting closed-loop *** recently,it was shown that by activating a static anti-windup mechanism in anticipation of actuator saturation,significant further performance improvements can be achieved in comparison with the delayed activation *** addition,we have combined both the delayed and anticipatory activation mechanisms,to develop the multiple activation strategy,in terms of(?) gain *** paper furthermore considers the problem of enlarging domain of attraction and demonstrates that the multiple activation of a static multiple feedback anti-windup mechanism would also lead to significant performance improvements over both the immediate and delayed activation schemes.

关键词： Actuator saturation anti-windup anticipatory activation domain of attraction multiple activation

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Design and realization of the simulation component-based parallel framework for HLA Federate

Design and realization of the simulation component-based par...

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2012 7th International Conference on system of systems Engineering, SoSE 2012

作者： Zhang, Jing Zhang, Yingchao Yu, Qin Zhang Guan, Chuan Fang Li, Wei Peng, Yong Science and Technology on Complex Systems Simulation Laboratory Beijing Institute of System Engineering Beijing China National University of Defense Technology Changsha China

ISBN: (纸本)9781467329750

While the difficulty and complexity of simulation system increasing, the development efficiency and execution performance of the large-scale distributed simulation system (LSDSS) must be improved effectively. Furthermore, while the multi-core has become popular hardware, yet the traditional federate mechanism couldn't utilize and schedule the CPU resource, which would limit the simulation performance. Then PFHF, Parallel Framework for HLA Federate, was designed and realized to solve the problem above. PFHF could combine and construct federate from simulation model components, perform simulation engine management, data distribution management, object management, component management and load balancing function, etc., then support the integrated execution environment based on multi-core and parallel technique. Several experiments proved that PFHF could utilize multi-core CPU adequately, and reduce the LSDSS execution time efficiently. © 2012 IEEE.

关键词： Circuit simulation

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An approach to resolve data semantic heterogeneity in simulation grid

An approach to resolve data semantic heterogeneity in simula...

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IASTED International Conference on Modelling and simulation, MS 2012

作者： Zhang, Ying-Chao Chen, Li-Li Yu, Qin-Zhang He, Yan Science and Technology on Complex Systems Simulation Laboratory Beijing Institute of System Engineering Chaoyang district AnXiang BeiLi Tenth Beijing China

ISBN: (纸本)9780889869264

In simulation grid, information sharing is very important for the grid units to cooperate with each other effectively and efficiently. In this paper, to resolve the problem of semantic heterogeneity, an ontology-based approach is proposed. In this approach, firstly, the local ontologies are merged into a global ontology based on their similarities. Then, with the merged global ontology, the semantic heterogeneity is resolved by comparing the classes and attributes of the local information source schemas. An example of how to resolve semantic heterogeneity in the E-government simulation grid is presented to illustrate this approach.

关键词： Ontology

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A modified PSO-BP algorithm in hydraulic system fault diagnosis application

A modified PSO-BP algorithm in hydraulic system fault diagno...

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2012 International Applied Mechanics, Mechatronics Automation Symposium, IAMMAS 2012

作者： Dong, Zengshou Zhang, Xiaoyu Zeng, Jianchao Dept. of Electronic Information Engineering Taiyuan University of Science and Technology Taiyuan China The System Simulation and Computer Application Research Laboratory Taiyuan University of Science and Technology Taiyuan China

ISBN: (纸本)9783037854266

BP neural network for failure pattern recognition has been used in hydraulic system fault ***, its convergence rate is relatively small and always trapped at the local minima. So a new modified PSO-BP hydraulic system fault diagnosis method was proposed,which combined the respective advantages of particle swarm algorithm and BP algorithm. Firstly, the inertia weight and learning factor of the standard particle swarm algorithm was improved, then BP neural network's weights and thresholds were optimized by modified PSO algorithm. BP network performance was ameliorated. The simulation results showed that this method improved the convergence rate of the BP network, and it could reduce the diagnostic errors. © (2012) Trans Tech Publications, Switzerland.

关键词： Failure analysis

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On design and realization of model registration mechanism based upon cloud computing

On design and realization of model registration mechanism ba...

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20th IASTED International Conference on Applied simulation and Modelling, ASM 2012

作者： Ren, Tingguang Wei, Jicai Jiang, Jiali Tang, Lijian Lv, Shaoqing Beijing Institute of System Engineer Science and Technology on Complex Systems Simulation Laboratory Post Box.9702 19 Beijing 100101 China

ISBN: (纸本)9780889869257

Through analyzing the theoretical basis and approach features of system-of-systems and cloud computing technology, the designing infrastructure and application flow of the meta-synthetic environment for equipment system-of-systems demonstration have been given with a combination of construction and application requirements of equipment system-of-systems centered on information. When designing the meta-synthetic environment for equipment system-of-systems demonstration, we adopted the way of Service Oriented Architecture (SOA), and put forward a model registration mechanism. By establishing the model registration principle, we designed and generated the model registration system, realized the model registration and management of the meta-synthetic environment to solve the quantification and evaluation issue and realized Design on Demand and Service on Demand of evaluation of the equipment system-of-systems demonstration meta-synthetic environment.

关键词： Demonstrations

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system-of-systems planning method based on Markowitz model

System-of-systems planning method based on Markowitz model

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20th IASTED International Conference on Applied simulation and Modelling, ASM 2012

作者： Wei, Jicai Ren, Tingguang Jiang, Jiali Zhao, Wei Cui, Hao Li, Junmei Beijing Institute of System Engineer Science and Technology on Complex Systems Simulation Laboratory Post Box.9702 19 Beijing 100101 China

ISBN: (纸本)9780889869257

In order to resolve the problems resulting from various combinations of equipment selection, numerous uncertainties of future demands and the development process, a planning method based on the Markowitz model is proposed. First a qualitative analysis is performed and models of a combination planning method are produced, then a Markowitz model of the development plan of system-of-systems under uncertainty is built and solved by adopting a searching algorithm based on vector operation. Finally the effectiveness of the method is checked by scouting the development planning examples of the early warning surveillance system.

关键词： system of systems

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Spectral mixture and chemometric algorithms applied to the identification of biosignatures on planetary surfaces 5

Spectral mixture and chemometric algorithms applied to the i...

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5th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS 2013

作者： Uckert, K. Chanover, N. Voelz, D. Glenar, D. Brinckerhoff, W. Getty, S. McMillan, N. Boston, P. Xiao, X. Tawalbeh, R. Li, X. New Mexico State University Department of Astronomy United States New Mexico State University Department of Electrical and Computer Engineering United States Atmospheric Experiment Laboratory Code 699 Solar System Exploration Division NASA/Goddard Space Flight Center United States New Mexico State University Department of Geological Sciences United States New Mexico Institute of Mining and Technology Department of Earth and Environmental Science United States Department of Astronomy New Mexico State University Box 30001/MSC 4500 Las CrucesNM88003-8001 United States

ISBN: (纸本)9781509011193

The utilization of a portable, low-mass, and low-power method for identifying biomarkers is essential for investigations of geologic samples on other terrestrial bodies, where spacecraft engineering requirements frequently constrain the mass and power consumption of scientific instruments. We discuss the capabilities and implementation of several in situ instruments with astrobiological applications to be used in possible future landed missions to other Solar system bodies. We present data collected from each instrument, discuss several analysis techniques, and discuss the unique results each instrument contributes to the identification of biosignatures. © 2013 IEEE.

关键词： Spectrum analysis

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