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Hierarchical Distributed Control for Interconnected systems

IFAC Proceedings Volumes 2013年第13期46卷 419-425页

作者： Martin Jilg Olaf Stursberg Institute of Control and System Theory Dept. of Electrical Eng. and Computer Science University of Kassel 34121 Kassel Germany

Most approaches concerning distributed control for physically interconnected systems assume a flat controller structure, i.e. the subsystems exchange state information directly and in each timestep. In this paper, ideas from distributed control, network topology optimization and optimal control are combined in order to construct a distributed two-layer state feedback control structure. A decomposition algorithm is proposed which groups the subsystems into distinct clusters. Within each cluster, information is exchanged between the subsystems in every timestep. On the upper layer of the hierarchy, informaton is exchanged between the clusters with a lower frequency. The underlying communication topology is optimized to obtain a compromise between control performance and communication cost. This leads to reduced communication between the subsystems compared to existing hierarchical approaches.

关键词： Hierarchical control interconnected systems quadratic performance indices

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Dynamic property evaluations of full-scale 4-story steel frame using parallel FE-analysis

Dynamic property evaluations of full-scale 4-story steel fra...

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9th US National and 10th Canadian Conference on Earthquake eng.neering 2010, Including Papers from the 4th International Tsunami Symposium

作者： Kohiyama, M. Ohsaki, M. Miyamura, T. Onda, K. Isobe, D. Akiba, H. Hori, M. Kajiwara, K. Ine, T. Dept. of System Design Eng. Keio University Yokohama 223-8522 Japan Dept. of Architecture and Architectural Eng. Kyoto University Kyoto 615-8540 Japan Dept. of Computer Science College of Eng. Nihon University Koriyama 963-8642 Japan Allied Engineering Corporation Minato-ku Tokyo 105-0014 Japan Graduate School of Systems and Information Eng. University of Tsukuba Tsukuba 305-8573 Japan Earthquake Research Institute University of Tokyo Bunkyo-ku Tokyo 113-0032 Japan Hyogo Earthquake Engineering Research Center National Research Institute for Earth Science and Disaster Prevention Miki 673-0515 Japan

ISBN: (纸本)9781617388446

The project of E-Simulator is under way at Hyogo Earthquake eng.neering Research Center (E-Defense) of National Research Institute of Earth Science and Disaster Prevention (NIED), Japan, which facilitates the world's largest shaking table. The E-Simulator uses the parallel finite element (FE) analysis software package called ADVENTYRECluster (ADVC) as a platform. In this study, we report the results of high-precision FE-analysis for simulation of collapse behavior of the 4-story steel building frame that is the specimen of the full-scale total collapse shaking-table test conducted in September 2007 at E-Defense. It is shown that elastoplastic dynamic responses can be estimated with good accuracy using a high-precision FE-analysis without resort to macro models such as plastic hinge and composite beam effect.

关键词： Finite element method

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Control of Uncertain Hybrid Nonlinear systems Using Particle Filters

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IFAC Proceedings Volumes 2012年第9期45卷 436-441页

作者： Leonhard Asselborn Martin Jilg Olaf Stursberg Institute of Control and System Theory Dept. of Electrical Eng. and Computer Science University of Kassel 34121 Kassel Germany

This paper proposes an optimization-based algorithm for the control of uncertain hybrid nonlinear systems. The considered system class combines the nondeterministic evolution of a discrete-time Markov process with the deterministic switching of continuous dynamics which itself contains uncertain elements. A weighted particle filter approach is used to approximate the uncertain evolution of the system by a set of deterministic runs. The desired control performance for a finite time horizon is encoded by a suitable cost function and a chance-constraint, which restricts the maximum probability for entering unsafe state sets. The optimization considers input and state constraints in addition. It is demonstrated that the resulting optimization problem can be solved by techniques of conventional mixed-integer nonlinear programming (MINLP). As an illustrative example, a path planning scenario of a ground vehicle with switching nonlinear dynamics is presented.

关键词： Hybrid automaton chance constraint particle filter jump Markov nonlinear system

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A new construction of the irreducible polynomial for parallel multiplier over GF(2m)

A new construction of the irreducible polynomial for paralle...

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Thirty-third International Symposium on Multiple-Valued Logic

作者： Hwang, Jong-Hak Moon, Kyung-Jae Park, Seung-Yong Kim, Heung-Soo Dept. of System Engineering Korea Sport Science Institute Incheon Korea Republic of Department of Electronic Engineering Inha University Incheon 402-751 Korea Republic of Dept. of Computer and Info. Eng. Jaenung College Incheon Korea Republic of

This paper presents the construction algorithm of the irreducible polynomial which needs to multiply over GF(2m) and the flow chart representing the proposed algorithm has been proposed. And also, we get the degree from the value of xm-k formation to the value of k = 7 using the proposed flow chart. The multiplier circuit has been implemented by using the proposed irreducible polynomial generation(IPG) algorithm in this paper, and we compared the proposed circuit with the conventional one. In the case of k = 7, one AND gate and five Ex-or gates are needed as the delay time for the irreducible polynomial in the proposed algorithm, but seven AND gates and seven Ex-or gates in the conventional one. As a result, the proposed algorithm shows the improved performance on the delay time.

关键词： Logic circuits

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Efficient test generation for built-in self-test boundary-scan template

Efficient test generation for built-in self-test boundary-sc...

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1991 IEEE VLSI Test Symposium: Chip-to-system Test Concerns for the 90''s, VTEST 1991

作者： Nagvajara, P. Karpovsky, M.G. Levitin, L.B. Dept. of Electr. and Comput. Eng. Drexel Univ. PhiladelphiaPA United States Research Laboratory for Design and Testing of Computer and Communication Systems Department of Electrical Computer and System Engineering Boston University United States

An analysis and design of a pseudorandom pattern generator, (PRPG), based on a linear recurrence, for built-in self-test (BIST) boundary scan design is presented. The authors present for the case when r≥s, a design of an s-stage PRPG capable of producing 2s-1 distinct r-bit patterns within 2s-1 clock pulses independent of the hardware realization of the PRPG. For the case when rr distinct r-bit patterns and the expected number T(N) of distinct patterns given a number N of clock pulses were presented. The proposed theoretical average N(T) was shown to be close to the experimental average values Nex(T). Hence, the value N(T) or T(N) can be used as a benchmark for evaluating the efficiency of a BIST boundary scan test generation. © 1991 IEEE.

关键词： Built-in self test

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Numerical simulation of green water incident on bow deck

Numerical simulation of green water incident on bow deck

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19th (2009) International OFFSHORE AND POLAR eng.NEERING CONFERENCE

作者： Lee, Young-Gill Kim, NamChul Kang, Bong-Han Jeong, Kwang-Leol Dept. of Naval Arch. and Ocean Eng. Inha University Incheon Korea Republic of Regional Research Center for Transportation System of Yellow Sea Inha University Incheon Korea Republic of Dept. of Naval Architecture Graduate School Inha University Incheon Korea Republic of

ISBN: (纸本)9781880653531

The importance of predicting the effect due to green water on a ship bow becomes decisive in designing a modern ship. In order to predict the green water impact on the bow structure efficiently, various numerical methods have been checked and compared to develop the desired numerical simulation technique. The Marker-density method has been applied to capture the extremely complicate free-surface with breaking on it, associated with the differentiated nonlinear governing equations. For a specific case, the green water phenomena on a model ship with wedge type bow structure have been simulated in this paper. Copyright © 2009 by The International Society of Offshore and Polar eng.neers (ISOPE).

关键词： Numerical methods

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Radix-4 Vectoring CORDIC Algorithm and architectures

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Journal of VLSI Signal Processing systems for Signal, Image, and Video Technology 1998年第2期19卷 127-147页

作者： Villalba, J. Zapata, E.L. Antelo, E. Bruguera, J.D. Dept. of Computer Architecture University of Malaga Málaga Spain Dept. Electrónica y Comp. University of Santiago de Compostela Spain University of Granada Spain University of Malaga Spain R and D Department of Fujitsu Spain Spain University of Malaga Spain Department of Computer Architecture Spain University of Santiago de Compostela Spain Department of Computer Architecture University of Malaga Spain Univ. de Santiago de Compostela Spain Dept. of Electronics and Comp. Eng. University of Santiago de Compostela Spain

In this work we extend the radix-4 CORDIC algorithm to the vectoring mode (the radix-4 CORDIC algorithm was proposed recently by the authors for the rotation mode). The extension to the vectoring mode is not straightforward, since the digit selection function is more complex in the vectoring case than in the rotation case;as in the rotation mode, the scale factor is not constant. Although the radix-4 CORDIC algorithm in vectoring mode has a similar recurrence as the radix-4 division algorithm, there are specific issues concerning the vectoring algorithm that demand dedicated study. We present the digit selection for nonredundant and redundant arithmetic (following two different approaches: arithmetic comparisons and table look-up), the computation and compensation of the scale factor, and the implementation of the algorithm (with both types of digit selection) in a word-serial architecture. When compared with conventional radix-2 (redundant and non-redundant) architectures, the radix-4 algorithms present a significant speed up for angle calculation. For the computation of the magnitude the speed up is very slight, due to the nonconstant scale factor in the radix-4 algorithm.

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High temperature stable [Ir3Si-TaN]/HfLaON CMOS with large work-function difference

High temperature stable [Ir3Si-TaN]/HfLaON CMOS with large w...

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2006 International Electron Devices Meeting, IEDM

作者： Wu, C.H. Hung, B.F. Chin, Albert Wang, S.J. Chen, W.J. Wang, X.P. Li, M.-F. Zhu, C. Jin, Y. Tao, H.J. Chen, S.C. Liang, M.S. Inst. of Microelectronics Dept. of Electronics Eng. National Cheng Kung Univ. Tainan Taiwan Dept. of EE Nat'l Chiao-Tung U. U. System of Taiwan Hsinchu Taiwan Graduate Inst. of Materials Eng. National Ping-Tung University of Science and Technology Taiwan SNDL Dept. of Electrical and Computer Eng. National Univ. of Singapore Singapore Singapore Taiwan Semiconductor Manufacturing Corp. Science-Based Industrial Park Hsinchu Taiwan

We report novel 1000C-stable [Ir3Si-TaN]/HfLaON CMOS for the first time, where the self-aligned and gate-first process are full compatible to current VLSI. Good Φm-eff of 5.08 and 4.24 eV, low Vt of -0.10 and 0.18 V,... 详细信息

ISBN: (纸本)1424404398

关键词： CMOS integrated circuits

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A novel program-erasable capacitor using high-κ AlN dielectric

A novel program-erasable capacitor using high-κ AlN dielect...

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Device Research Conference - Conference Digest, 62nd DRC

作者： Lai, C.H. Ma, M.W. Cheng. C.F. Chin, Albert McAlister, S.P. Zhu, C.X. Li, M.-F. Kwong, D.L. Dept. of Electronics Eng. National Chiao Tung Univ. Univ. System of Taiwan Hsinchu Taiwan National Research Council of Canada Ottawa Canada Si Nano Device Lab. Dept. of Elec. and Computer Eng. National Univ. of Singapore Singapore Singapore Dept. of Elec. and Comp. Engineering Univ. of Texas Austin TX 78712 United States

ISBN: (纸本)0780382846

We demonstrate, for the first time, a novel high-κ AlN capacitor that can be program-erasable at voltages of ± 4V and that has good retention for 1T1C memory. These features are not shown by Al2O3, or other known single high-κ layer capacitors. Good data retention occurs with a threshold change of only 0.06V after ± 4V P/E for 104s and shows potentially long memory time.

关键词： MOS capacitors

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Temporal logic motion control using actor-critic methods

Temporal logic motion control using actor-critic methods

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Xu Chu Ding Jing Wang Morteza Lahijanian Ioannis Ch. Paschalidis Calin A. Belta Embedded Systems and Networks group United Technologies Research Center East Hartford CT Division of System Eng. Dept. of Mechanical Eng. Dept. of Electrical & Computer Eng. and Dept. of Mechanical Eng. Boston University Boston MA

In this paper, we consider the problem of deploying a robot from a specification given as a temporal logic statement about some properties satisfied by the regions of a large, partitioned environment. We assume that the robot has noisy sensors and actuators and model its motion through the regions of the environment as a Markov Decision Process (MDP). The robot control problem becomes finding the control policy maximizing the probability of satisfying the temporal logic task on the MDP. For a large environment, obtaining transition probabilities for each state-action pair, as well as solving the necessary optimization problem for the optimal policy are usually not computationally feasible. To address these issues, we propose an approximate dynamic programming framework based on a least-square temporal difference learning method of the actor-critic type. This framework operates on sample paths of the robot and optimizes a randomized control policy with respect to a small set of parameters. The transition probabilities are obtained only when needed. Hardware-in-the-loop simulations confirm that convergence of the parameters translates to an approximately optimal policy.

关键词： Computational modeling Robot sensing systems Materials requirements planning Manganese Automata Markov processes

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