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Powertrain and Fluid systems Conference and Exhibition

作者： Montazeri-Gh, Morteza Asadi, Mohammad Systems Simulation and Control Laboratory Mechanical Engineering Department Iran University of Science and Technology Iran

This paper describes a methodological approach for the investigation of the influence of the road grade on the optimization of the HEV control strategy. In this study, the genetic-fuzzy control strategy for the HEV power flow management is employed. The genetic-fuzzy control strategy is a fuzzy control strategy which is tuned offline using the genetic algorithm (GA). In this approach, the optimal selection of the fuzzy control parameters is formulated as a constrained optimization problem. In addition, the objective is defined to minimize the vehicle fuel consumption and emissions while satisfying the driving performance *** tuning process is performed for TEH-CAR driving cycle taking the grade into account. TEH-CAR is a driving cycle that is developed based on the experimental data collected from the real traffic conditions. The simulation results show the effectiveness of the approach and reveal that the road grade has a considerable influence on the HEV fuel use and emissions. Copyright © 2006 SAE International.

关键词： Hybrid vehicles

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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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NONLINEAR NETWORK STRUCTURES FOR FEEDBACK CONTROL

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Asian Journal of Control 2008年第4期1卷

作者： F.L. Lewis Dept. of Electical Engineering The University of Texas at Arlington U.S.A. F. L. Lewis was born in Wärzburg. Germany subsequently studyning in Chile and Goruonstoun School in Scotland. He obtained the Bachelor's Degree in Physics/Electrical Engineering and the Master's of Electrical Engineering Degree at Rice University in 1971. He spent six years in the U.S. navy serving as Navigator aboard the frigate USS Trippe (FF-1075) and Executive Officer and Acting Commanding Officer aboard USS Salinan (ATF-161). In 1977 he received the Master's of Science in Aeronautical Engineering from the University of West Florida. In 1981 he obtained the Ph.D. degree at The Georgia Institute of Technology in Atlanta where he was employed as a professor from 1981 to 1990 and is currently an Adjunct Professor. He is a Professor of Electrical Engineering at The University of Texas at Arlington where he was awarded the Moncrief-O'Donnell Endowed Chair in 1990 at the Automation and Robotics Research Institute. Dr. Lewis has studied the geometric analytic and structural properties of dynamical systems and feedback control automation. His current interests include robotics intelligent control neural and fuzzy systes nonlinear systems and manufacturing process control. He is the author/co-author of 2 U.S. patents 124 journal papers 20 chapters and encyclopedia articles 210 refereed conference papers seven books: Optimal Control Optimal Estimation Applied Optimal Control and Estimation Aircraft Control and Simulation Control of Robot Manipulators Neural Network Control High-Level Feedback Control with Neural Networks and the IEEE reprint volume Robot Control. Dr. Lewis is a registered Professional Engineer in the State of Texas and was selected to the Editorial Boards of International Journal of Control Neural Computing and Applications and Int. J. Intelligent Control Systems. He is the recipient of an NSF Research Initiation Grant and has been continuously funded by NSF since 1982. Since 1991 he has received $1.8 m

A framework is given for controller design using Nonlinear Network Structures, which include both neural networks and fuzzy logic systems. These structures possess a universal approximation property that allows them to be used in feedback control of unknown systems without requirements for linearity in the system parameters or finding a regression matrix. Nonlinear nets can be linear or nonlinear in the tunable weight parameters. In the latter case weight tuning algorithms are not straightforward to obtain. Feedback control topologies and weight tuning algorithms are given here that guarantee closed-loop stability and bounded weights. Extensions are discussed to force control, backstepping control, and output feedback control, where dynamic nonlinear nets are required.

关键词： Intelligent feedback control neural networks neural network structures basis function networks fuzzy control fuzzy-neural networks universal approximation adaptive nonparametric control learning control systems

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Project SAIF - Assessment of ship helicopter operating limits using the Merlin helicopter simulator

Project SAIF - Assessment of ship helicopter operating limit...

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AHS Internaitonal 62nd Annual Forum

作者： Turner, Graham Clark, Will Cox, Ian Finlay, Bryan Duncan, John QinetiQ Bedford United Kingdom Systems Engineering and Assessment Ltd. Bristol United Kingdom Systems Engineer Defence Science and Technology Laboratory Farnborough United Kingdom Head of Simulation Based Acquisition Sea Systems Technology Defence Procurement Agency Bristol United Kingdom

ISBN: (纸本)9781617829314

The paper describes recent work conducted under project SAIF (Ship / Air Interface Framework). The programme, funded by the UK Ministry of Defence, has developed a networked version of the dynamic Merlin helicopter simulator located at Royal Naval Air Station Culdrose. The paper describes the models used and highlights the major strengths and some weaknesses of the integrated simulation approach. Having assessed the operating limits for a Merlin flying to a Type-23 Frigate and made tuning adjustments where appropriate, the results have been validated against available flight test data. The simulation has subsequently been used to make a full assessment of the operating limits of the Merlin flying to a Type-45 Destroyer prior to its entry into service in 2009. Although the data from this trial are not available for publication, the key achievements are summarised. Copyright © 2006 by the American Helicopter Society International, Inc. All rights reserved.

关键词： Helicopters

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Implication of the sidereal anisotropy of ∼5 TeV cosmic ray intensity observed with the Tibet III air shower array

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AIP Conference Proceedings 2007年第1期932卷 283-289页

作者： Amenomori, M. Ayabe, S. Bi, X.J. Chen, D. Cui, S.W. Danzengluobu Ding, L.K. Ding, X.H. Feng, C.F. Feng, Zhaoyang Feng, Z.Y. Gao, X.Y. Geng, Q.X. Guo, H.W. He, H.H. He, M. Hibino, K. Hotta, N. Hu, Haibing Hu, H.B. Huang, J. Huang, Q. Jia, H.Y. Kajino, F. Kasahara, K. Katayose, Y. Kato, C. Kawata, K. Labaciren Le, G.M. Li, A.F. Li, J.Y. Lou, Y.-Q. Lu, H. Lu, S.L. Meng, X.R. Mizutani, K. Mu, J. Munakata, K. Nagai, A. Nanjo, H. Nishizawa, M. Ohnishi, M. Ohta, I. Onuma, H. Ouchi, T. Ozawa, S. Ren, J.R. Saito, T. Saito, T.Y. Sakata, M. Sako, T.K. Sasaki, T. Shibata, M. Shiomi, A. Shirai, T. Sugimoto, H. Takita, M. Tan, Y.H. Tateyama, N. Torii, S. Tsuchiya, H. Udo, S. Wang, B. Wang, H. Wang, X. Wang, Y.G. Wu, H.R. Xue, L. Yamamoto, Y. Yan, C.T. Yang, X.C. Yasue, S. Ye, Z.H. Yu, G.C. Yuan, A.F. Yuda, T. Zhang, H.M. Zhang, J.L. Zhang, N.J. Zhang, X.Y. Zhang, Y. Zhaxisangzhu Zhou, X.X. Department of Physics Hirosaki University Hirosaki 036-8561 Japan Department of Physics Saitama University Saitama 338-8570 Japan Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China Faculty of Engineering Yokohama National University Yokohama 240-8501 Japan Department of Physics Hebei Normal University Shijiazhuang 050016 China Department of Mathematics and Physics Tibet University Lhasa 850000 China Department of Physics Shandong University Jinan 250100 China Institute of Modern Physics SouthWest Jiaotong University Chengdu 610031 China Department of Physics Yunnan University Kunming 650091 China Faculty of Engineering Kanagawa University Yokohama 221-8686 Japan Faculty of Education Utsunomiya University Utsunomiya 321-8505 Japan Institute for Cosmic Ray Research University of Tokyo Kashiwa 277-8582 Japan Department of Physics Konan University Kobe 658-8501 Japan Faculty of Systems Engineering Shibaura Institute of Technology Saitama 337-8570 Japan Department of Physics Shinshu University Matsumoto 390-8621 Japan Center of Space Science and Application Research Chinese Academy of Sciences Beijing 100080 China Physics Department Tsinghua University Beijing 100084 China Tsinghua Center for Astrophysics Tsinghua University Beijing 100084 China Advanced Research Institute for Science and Engineering Waseda University Tokyo 169-8555 Japan Advanced Media Network Center Utsunomiya University Utsunomiya 321-8585 Japan National Institute of Informatics Tokyo 101-8430 Japan Tochigi Study Center University of the Air Utsunomiya 321-0943 Japan Tokyo Metropolitan College of Industrial Technology Tokyo 116-8523 Japan Shonan Institute of Technology Fujisawa 251-8511 Japan RIKEN Wako 351-0198 Japan School of General Education Shinshu University Matsumoto 390-8621 Japan

We show that the large-scale anisotropy of ∼5 TeV galactic cosmic ray (GCR) intensity observed by Tibet Air Shower experiment can be reproduced by the superposition of a bi-directional and uni-directional flows (UDF and BDF) of GCRs. The heliosphere is located inside the local interstellar cloud (LIC) very close to the inner edge of the LIC. If the GCR population is lower inside the LIC than outside, the BDF flow is expected from the parallel diffusion of GCRs into LIC along the local interstellar magnetic field (LISMF) connecting the heliosphere with the region outside the LIC, where the GCR population is higher. A type of the UDF, on the other hand, is expected from the B×n drift flux driven by a gradient of GCR density (n) in the LISMF (B). The LISMF orientation deduced from the best-fit direction of the BDF is almost parallel to the galactic plane and more consistent with the suggestion of Frisch (1996) than that of Lallement et al. (2005). We note that the model, if holds, yields the LISMF polarity together with its orientation. © 2007 American Institute of Physics.

关键词： Cosmic rays Extensive air shower

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Observation of ocean current response to 1998 Hurricane Georges in the Gulf of Mexico

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Acta Oceanologica Sinica 2006年第1期25卷 1-14页

作者： ZHENG Quanan LAI Ronald J HUANG Nortlen E PAN Jiayi LIU W Timothy Department of Atmospheric and Oceanic Science University of Maryland College Park Maryland 20742 USA Minerals Management Service U S Department of the Interior Hemdon Virginia 20170 USA Ocean and Ice Branch NASA Goddard Space Flight Center Greenbelt Maryland 20771 USA Department of Environmental and Biomolecular Systems Oregon Graduate Institute Beaverton Oregon 97006 USA Jet Propulsion Laboratory California Institute of Technology Pasadena California 91109 USA

The ocean current response to a hurricane on the shelf-break is examined. The study area is the DeSoto Canyon in the northeast Gulf of Mexico, and the event is the passage of 1998 Hurricane Georges with a maximum wind speed of 49 m/s. The data sets used for analysis consist of the mooring data taken by the Field Program of the DeSoto Canyon Eddy Intrusion Study, and simultaneous winds observed by NOAA （National Oceanic and Atmospheric Administration） Moored Buoy 42040. Time-depth ocean current energy density images derived from the observed data show that the ocean currents respond almost immediately to the hurricane with important differences on and offthe shelf. On the shelf, in the shallow water of 100 m, the disturbance penetrates rapidly downward to the bottom and forms two energy peaks, the major peak is located in the mixed layer and the secondary one in the lower layer. The response dissipates quickly after external forcing disappears. Offthe shelf, in the deep water, the major disturbance energy seems to be trapped in the mixed layer with a trailing oscillation; although the disturbance signals may still be observed at the depths of 500 and 1 290 m. Vertical dispersion analysis reveals that the near-initial wave packet generated offthe shelf consists of two modes. One is a barotropic wave mode characterized by a fast decay rate of velocity amplitude of 0.020 s^-, and the other is baroclinic wave mode characterized by a slow decay rate of 0.006 9 s^-1. The band-pass-filtering and empirical function techniques are employed to the frequency analysis. The results indicate that ialf frequencies shift above the local inertial frequency. On the shelf, the average frequency is 1.04fin the mixed layer, close to the diagnosed frequency of the first baroclinic mode, and the average frequency increases to 1.07fin the thermocline. Offthe shelf, all frequencies are a little smaller than the diagnosed frequency of the first mode. The average frequency decreases from 1.035

关键词： shelf dynamics hurricane ocean current air-sea interaction

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Using Accelerator Feedback to Improve Performance of Integral-Controller Particle Swarm Optimization

Using Accelerator Feedback to Improve Performance of Integra...

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Firth IEEE International Conference on Cognitive Informatics(第五届认知信息国际会议)

作者： Zhihua Cui Jianchao Zeng Guoji Sun State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049 Division of System Simulation and Computer Application Taiyuan University of Science and Technology State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an 710049

ISBN: (纸本)9781424404759

Integral-controller particle swarm optimization (ICPSO), influenced by inertia weight w and coefficient ψ is a new swarm technology by adding accelerator information. Based on stability analysis, the convergence conditions imply the negative selection principles of inertia weight w, and the relationship between w and ψ. To improve the computational efficiency, an adaptive strategy for tuning the parameters of ICPSO is described using a new statistical variable reflecting computational efficiency index-average accelerator information. The optimization computing of some examples is made to show that the ICPSO has better global search capacity and rapid convergence speed.

关键词： Particle swarm optimization Average Accelerator Information Integral-controller

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Predicted Particle Swarm Optimization

Predicted Particle Swarm Optimization

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Firth IEEE International Conference on Cognitive Informatics(第五届认知信息国际会议)

作者： Zhihua Cui Jianchao Zeng Guoji Sun State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an. 710049 Division of System Simulation and Computer Application Taiyuan University of Science and Technology State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an. 710049

ISBN: (纸本)1424404754;9781424404759

The standard particle swarm optimization (PSO) may prematurely converge on suboptimal solution partly because of the insufficiency information utilization of the velocity. The time cost by velocity is longer than position of each particle of the swarm, though the velocity, limited by the constant Vmax, onfy provides the positional displacement To avoid premature convergence, a new modified PSO, predicted PSO, is proposed owning two different swarms in which the velocity without limitation, considered as a predictor, is used to explore the search space besides providing the displacement while the position considered as a corrector. The algorithm gives some balance between global and local search capability. The optimization computing of some examples is made to show the new algorithm has better global search capacity and rapid convergence rate.

关键词： Particle swarm optimization Predicted velocity Exploration capability Exploitation capability

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Supervising Remote Humanoids Across Intermediate Time Delay

Supervising Remote Humanoids Across Intermediate Time Delay

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IEEE-RAS International Conference on Humanoid Robots

作者： Kimberly Hambuchen William Bluethmann Michael Goza Robert Ambrose Kenneth Rabe Mark Allan Automation Robotics and Simulation Division NASA-Johnson Space Center Houston TX USA Planning Software Systems Group Jet Propulsion Laboratory/California Institute of Technology Pasadena CA USA Intelligent Robotics Group NASA Ames Research Center Moffett Field CA USA

ISBN: (纸本)1424401992;142440200X

The President's Vision for space Exploration, laid out in 2004, relies heavily upon robotic exploration of the lunar surface in early phases of the program. Prior to the arrival of astronauts on the lunar surface, these robots will be required to be controlled across space and time, posing a considerable challenge for traditional telepresence techniques. Because time delays will be measured in seconds, not minutes as is the case for Mars Exploration, uploading the plan for a day seems excessive. An approach for controlling humanoids under intermediate time delay is presented. This approach uses software running within a ground control cockpit to predict an immersed robot supervisor's motions which the remote humanoid autonomously executes. Initial results are presented

关键词： Delay effects Orbital robotics Moon space exploration Robot vision systems Extraterrestrial measurements Time measurement Mars Motion control Humanoid robots

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Solar Induced Fluorescence and Reflectance Sensing Techniques for Monitoring Nitrogen Utilization in Corn

Solar Induced Fluorescence and Reflectance Sensing Technique...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： L. Corp E. Middleton C. Daughtry P. Campbell Science Systems and Applications Inc. Lanham MD USA Hydrospheric & Biospheric Sciences Laboratory NASA''s Goddard Space Flight Center Greenbelt MD USA Hydrology & Remote Sensing Laboratory USDA ARS Beltsville MD USA Joint Center for Earth Systems Technology UMBC Baltimore MD USA

Remote sensing systems using either passive reflectance (R) or actively induced fluorescence (F) have long been explored as a means to monitor species composition and vegetative productivity. Passive F techniques using the Fraunhofer line depth (FLD) principle to isolate solar induced F (SIF) from the high resolution R continuum have also been suggested for the large-scale remote assessment of vegetation. The FLD principle was applied to both canopy R spectra and AISA multi-spectral imagery to discriminate the relatively weak in situ vegetation F in-fill of the telluric O 2 bands located at 688 nm and 760 nm. The magnitudes of SIF retrieved from R ranged from 7 to 36 mW/m 2 /nm/sr and the ratio of the two spectral bands successfully discriminated the four N treatment levels. In addition, a number of R indices including but not limited to the physiological reflectance index (PRI), R 550 /R 515 and R 750 /R 800 were calculated from the AISA aircraft imagery and the high-resolution canopy R spectra. These indexes were then evaluated against georeferenced ground measurements of leaf area index (LAI), pigment contents, grain yields, and light use efficiency (LUE). A number of significant relationships were evident in both R and SIF indices to the biophysical changes in corn induced by N application rates. From this investigation we conclude that valuable SIF information can be extracted from high-resolution canopy R data and indices calculated from both data types can supply useful information for modeling N use for carbon sequestration by vegetation.

关键词： Fluorescence Reflectivity Nitrogen Remote monitoring Vegetation mapping Productivity Large-scale systems Multispectral imaging Biomedical monitoring Aircraft

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