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Realization of High-Speed and Big-Capability Data Recorder

Realization of High-Speed and Big-Capability Data Recorder

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2013 IEEE 11th International Conference on Electronic Measurement & Instruments

作者： Deng Libao Zhao Haoran Yang Yi Dept. of Automatic Test and Control Harbin Institute of Technology School of Information Science and Engineering Harbin Institute of Technology at Weihai The Second Artillery Representation Office in Harbin

ISBN: (纸本)9781479907571

Data-recording device for aircraft requires high-speed, high-capacity and non-volatile storage. In the paper, we provide a good solution for high-speed large-capacity data logger. We use FPGA as controller, SDRAM as high-speed data buffer, CF card as a non-volatile data memory and USB2.0 as Communication interface to design a dual-channel data logger. The Test results show that the recorder sampling rate is 120MSa/s, single-channel data store rate is 38MB/s, the total capacity is 64GB, and data upload rate is up to 30MB/s. Therefore it meets the expectations.

关键词： FPGA, CF card, SDRAM, USB2.0

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Structured coprime factorizations description of linear and time-invariant networks

Structured coprime factorizations description of linear and ...

引用

52nd IEEE Conference on Decision and control, CDC 2013

作者： SabǍu, Şerban OarǍ, Cristian Warnick, Sean Jadbabaie, Ali Electrical and Computer Engineering Dept. Stevens Institute of Technology United States Faculty of Automatic Control Dept. University Politehnica Bucharest Romania Faculty of Computer Science Department Information and Decision Algorithms Laboratories Brigham Young University United States Faculty of Electrical and Systems Engineering Dept. University of Pennsylvannia United States

ISBN: (纸本)9781467357173

In this paper we study state-space realizations of Linear and Time-Invariant (LTI) systems. Motivated by biochemical reaction networks, Gonçalves and Warnick have recently introduced the notion of a Dynamical Structure Functions (DSF), a particular factorization of the system's transfer function matrix that elucidates the interconnection structure in dependencies between manifest variables. We build onto this work by showing an intrinsic connection between a DSF and certain sparse left coprime factorizations. By establishing this link, we provide an interesting systems theoretic interpretation of sparsity patterns of coprime factors. In particular we show how the sparsity of these coprime factors allows for a given LTI system to be implemented as a network of LTI sub-systems. We examine possible applications in distributed control such as the design of a LTI controller that can be implemented over a network with a pre-specified topology. ©2013 IEEE.

关键词： Factorization

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Estimation of 3D pose of femurs in bi-planar digital radiographs

Estimation of 3D pose of femurs in bi-planar digital radiogr...

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World Congress on Medical Physics and Biomedical Engineering

作者： Zhang, B. Sun, J.W. Chi, Z.Y. Sun, S.B. Meng, S. Zhang, Y. Rolfe, P. Dept. Automatic Measure and Control Harbin Institute of Technology Harbin China Dept. Electrical and Electronic Engineering Harbin University of Science and Technology Harbin China Dept. of Orthopedics Harbin Medical University Harbin China

ISBN: (纸本)9783642293047

Pre-operative planning in orthopedic surgery is essential to identify the optimal surgical considerations for each patient-specific case. Estimation of the three-dimensional (3D) pose of bones plays an important role in computer assisted diagnosis and surgery. However, understanding the 3D pose of femoral fractures on plain radiographs is challenging, and 3D imaging modalities such as Computed Tomography (CT) are still being restricted to a minority of complex orthopedic procedures. Although the existing application has focused on registering a 3D model of the bone to the images of the same bone intra-operatively, pre-operative 3D pose estimation is more valuable for surgery planning. This paper proposes a method for recovering 3D pose by registering a preoperatively prepared generic 3D model of a bone to bi-planar (frontal and lateral) digital radiographs (DR images) of different patients. It can perform 3D-2D registration with unknown correspondence automatically without invasive external fiducial markers. This 3D-2D registration will identify the position and orientation of the femur in six degrees (Rx,Ry,R z,tx,ty,tz) of freedom. Validation results using different femurs show that this method is robust and accurate in estimating the 3D pose of femurs in bi-planar radiographs of different patients. © 2013 Springer-Verlag.

关键词： Bone

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control of uncertain nonlinear systems using ellipsoidal reachability calculus

Control of uncertain nonlinear systems using ellipsoidal rea...

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9th IFAC Symposium on Nonlinear control Systems, NOLCOS 2013

作者： Asselborn, L. Groß, D. Stursberg, O. Institute of Control and System Theory Dept. of Electrical Eng. and Computer Science University of Kassel Germany

ISBN: (纸本)9783902823472

This paper proposes an approach to algorithmically synthesize control strategies for discrete-time nonlinear uncertain systems based on reachable set computations using the ellipsoidal calculus. For given ellipsoidal initial sets and bounded ellipsoidal disturbances, the proposed algorithm iterates over conservatively approximating and LMI-constrained optimization problems to compute stabilizing controllers. The method uses first-order Taylor approximation of the nonlinear dynamics and a conservative approximation of the Lagrange remainder. An example for illustration is included. © IFAC.

关键词： Calculations

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Dynamic Modeling and Simulation Study of Falling Film Evaporation and Condensation

Dynamic Modeling and Simulation Study of Falling Film Evapor...

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EUROSIM Congress on Modelling and Simulation (EUROSIM)

作者： Alberto de la Calle Luis J. Yebra Sebastián Dormido Automatic Control Group CIEMAT-Plataforma Solar de Almería Tabernas Spain Dept. of Computer Science and Automatic Control UNED Madrid Spain

Falling film evaporators and condensers have demonstrated a good performance in air-conditioning and refrigeration. A study of falling film evaporation and condensation models is presented in this document. Two different evaporator models and a condenser model are being developed considering a trade-off between efficiency and accuracy. These models are based on classical Newton's viscosity law and Nusselt falling film theory. Two libraries, with evaporator and condenser components, compatible with Modelica. Fluid, Modelica. Thermal and Modelica. Media have been implemented. The presented simulations have the expected behaviour. These models will be used to complete a model of a heat pump.

关键词： Electron tubes Heat transfer Mathematical model Libraries Atmospheric modeling Generators Thermodynamics

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Hierarchical distributed control for interconnected systems

Hierarchical distributed control for interconnected systems

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13th IFAC Symposium on Large Scale Complex Systems: Theory and Applications, LSS 2013

作者： Jilg, Martin Stursberg, Olaf 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. © IFAC.

关键词： Large scale systems

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Cyclic scheduling of multimodal processes in mesh-like environment

Cyclic scheduling of multimodal processes in mesh-like envir...

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2013 IEEE 18th International Conference on Emerging Technologies and Factory Automation, ETFA 2013

作者： Bocewicz, Grzegorz Muszyński, Wojciech Banaszak, Zbigniew Koszalin University of Technology Dept. of Computer Science and Management Koszalin Poland Wroclaw University of Technology Institute of Computer Engineering Control and Robotics Wroclaw Poland

ISBN: (纸本)9781479908622

A processes composed of sequences of local cyclic The theoretical prediction of the behavioral properties of periodic structures is less difficult than in the case of nonperiodic ones. That is because all the information needed to describe the entire structure is given by the elementary substructure itself and by the manner it repeats in the whole periodic structure. So, only a small portion of the structure (which includes the repeating substructure) needs to be considered to obtain the properties of the whole periodic structure. In that context, the contribution provides the discussion of some system periodicity issues, and is aimed at modeling and evaluation of relationships linking the system structure features with required system's functioning. © 2013 IEEE.

关键词： Periodic structures

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The Single-Pass Perceptual Embedded Zero-tree Coding implementation and optimization on DSP

The Single-Pass Perceptual Embedded Zero-tree Coding impleme...

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2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012

作者： Wu, Bing-Fei Huang, Hao-Yu Wang, Jenq-Haur Chen, Yen-Lin Dept. of Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan Dept. of Computer Science and Information Engineering National Taipei University of Technology Taipei Taiwan

ISBN: (纸本)9783037856123

In this paper, a block-edge based Single-Pass Perceptual Embedded Zero-tree Coding (SPPEZC) method is proposed and implemented on the DSP-based platform. SPPEZC combines two novel compression concepts which are Block-Edge Detection (BED) and Low-Complexity and Low-Memory Entropy Coder (LLEC) for the coding efficiency and quality. Besides, the proposed SPPEZC is implemented as fixed-point version and optimized on the DSP-based platform based on both the presented platform-independent and platform-dependent optimization technologies. The performance including compression quality and efficiency is validated by experimental results. © (2013) Trans Tech Publications, Switzerland.

关键词： Image compression

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Declarative approach to AGVS modeling and cyclic scheduling

Declarative approach to AGVS modeling and cyclic scheduling

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4th International Conference on Information Technology for Manufacturing Systems, ITMS 2013

作者： Grzegorz, Bocewicz Wojciech, Muszyński Zbigniew, Banaszak Dept. of Electronics and Computer Science Koszalin University of Technology Koszalin Poland Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland Dept. of Business informatics Warsaw University of Technology Warsaw Poland

ISBN: (纸本)9783037858783

The paper presents constraint satisfaction problem driven approach to analytical solution of the cyclic scheduling problem in the Flexible Manufacturing System (FMS) producing multi-type parts where for material handling are used the Automated Guide Vehicles Systems (AGVS). Finding the conditions guaranteeing the AGVs deadlock-free and collision-free movement policy is the aim of our researches. The AGVs co-sharing the common parts of the transportation route while executing repetitive processes, i.e. being assigned to AGVs passing along machines in a cyclic way, can be modeled in terms of Cyclic Concurrent Process Systems (CCPS). Schedulability analysis for a given CCPS answers the question whether a cyclic schedule exists or not. The paper suggests approach for schedulability analysis of multimodal processes representing real manufacturing employing the declarative modeling. © (2013) Trans Tech Publications, Switzerland.

关键词： Decision support systems

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Online control message aggregation in chain networks

Online control message aggregation in chain networks

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13th International Symposium on Algorithms and Data Structures, WADS 2013

作者： Bienkowski, Marcin Byrka, Jaroslaw Chrobak, Marek Jez, Lukasz Sgall, Jiří Stachowiak, Grzegorz Institute of Computer Science University of Wroclaw Poland Department of Computer Science University of California Riverside CA United States Dept. of Computer Control and Management Engineering Sapienza University of Rome Italy Computer Science Institute Faculty of Mathematics and Physics Charles University Czech Republic

ISBN: (纸本)9783642401039

In the control Message Aggregation (CMA) problem, control packets are generated over time at the nodes of a tree T and need to be transmitted to the root of T. To optimize the overall cost, these transmissions can be delayed and different packets can be aggregated, that is a single transmission can include all packets from a subtree rooted at the root of T. The cost of this transmission is then equal to the total edge length of this subtree, independently of the number of packets that are sent. A sequence of transmissions that transmits all packets is called a schedule. The objective is to compute a schedule with minimum cost, where the cost of a schedule is the sum of all the transmission costs and delay costs of all packets. The problem is known to be -hard, even for trees of dept. 2. In the online scenario, it is an open problem whether a constant-competitive algorithm exists. We address the special case of the problem when T is a chain network. For the online case, we present a 5-competitive algorithm and give a lower bound of 2 + φ ≈ 3.618, improving the previous bounds of 8 and 2, respectively. Furthermore, for the offline version, we give a polynomial-time algorithm that computes the optimum solution. © 2013 Springer-Verlag.

关键词： Costs

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