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Sampled Data Model Predictive control for Step Response Models

Sampled Data Model Predictive Control for Step Response Mode...

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Li Chai Xiaodong Zhao Department of Electrical and Computer Systems Engineering Monash University VIC Australia Institute of Information and Control Hangzhou Dianzi University Hangzhou China

A design method of model predictive controller for sampled-data systems is presented using the lifting model of the step response of the plant. Compared to the standard model predictive controller, the new controller ... 详细信息

关键词： Data models Predictive control Predictive models Sampling methods Digital control control systems Error correction control system synthesis Open loop systems Robust stability

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On Probing Signal Design for MIMO Radar

On Probing Signal Design for MIMO Radar

引用

Asilomar Conference on Signals, systems & computers

作者： Jian Li Petre Stoica Yao Xie Department of Electrical and Computer Engineering University of Florida Gainesville FL USA Department of Information Technology Systems and Control Division University of Uppsala Uppsala Sweden

A MIMO (multi-input multi-output) radar system, unlike a standard phased-array radar, can choose freely the probing signals transmitted via its antennas to maximize the power around the locations of the targets of interest, or more generally to approximate a given transmit beampattern, and also to minimize the cross-correlation of the signals reflected back to the radar by the targets of interest. In this paper, we show how the above desirable features can be achieved by designing the covariance matrix of the probing signal vector transmitted by the radar. Moreover, in a numerical study, we show that the proper choice of the probing signals can significantly improve the performance of adaptive MIMO radar techniques. Additionally, we demonstrate the advantages of several MIMO transmit beampattern designs, including a beampattern matching design and a minimum sidelobe beampattern design, over their phased- array counterparts.

关键词： Signal design MIMO Radar antennas Transmitting antennas Covariance matrix Narrowband Information technology control systems Reflector antennas Azimuth

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Robust Finite Time control of Nonlinear systems with Dynamic Uncertainty

Robust Finite Time Control of Nonlinear Systems with Dynamic...

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American control Conference

作者： Yiguang Hong Zhong-Ping Jiang Institute of Systems Science Key Laboratory of Systems and Control Chinese Academy and Sciences Beijing China Department of Electrical and Computer Engineering Polytechnic University Brooklyn NY USA

In this paper, robust finite-time control problem of nonlinear systems with dynamic uncertainties is investigated. To solve this problem, a partial-state control design is proposed in a constructive way. With small-ga... 详细信息

ISBN: (纸本)1424402093

关键词： Lyapunov methods control system synthesis nonlinear control systems nonlinear dynamical systems robust control uncertain systems dynamic uncertainties finite time control finite-time stabilization input-to-state stability nonsmooth feedback partial-state

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Discrete-event system modeling and supervisory control for under-load tap-changing transformers

Discrete-event system modeling and supervisory control for u...

引用

IEEE International Conference on computer-Aided Design

作者： A. Afzalian Ali Saadatpoor W. M. Wonham Department of Control Systems Eng Shahid Abbaspour University of Technology Tehran Iran Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

Discrete-event systems (DES) can be found as essential integrated subsystems in electrical power systems. The continuous trajectory of the system state can be interrupted by discrete control actions and uncontrolled disturbances. Under-load tap-changing transformers (ULTC) which obviously have discrete-event behavior are widely used in transmission systems to take care of instantaneous variations in the load conditions in substations. ULTC may be controlled either automatically or manually. The paper discusses synthesis of supervisory controller of ULTC as a discrete-event system. Different parts of the ULTC as well as its control logic (specification) have been modeled as DES. Supervisory controllers are designed for the tap-changer in Automatic and Auto/Manual modes of operation. It is shown that the specifications are controllable and the closed loop control system is non-blocking. Protective system designers in electrical powers systems can use the proposed approach to verify their control logic for ULTC.

关键词： Discrete event systems Supervisory control Transformers Automatic control Power system modeling control systems Power system protection Substations control system synthesis Logic

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On Multi-Static Adaptive Microwave Imaging Methods for Early Breast Cancer Detection

On Multi-Static Adaptive Microwave Imaging Methods for Early...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Yao Xie Bin Guo Jian Li P. Stoica Department of Electrical and Computer Engineering University of Florida Gainesville FL USA Department of Information Technology Systems and Control Division University of Uppsala Uppsala Sweden

We present two improved multi-static adaptive microwave imaging (MAMI) methods: MAMI-2 and MAMI-C, for early breast cancer detection. MAMI is one of the microwave imaging modalities based the significant contrast between the dielectric properties of normal and malignant breast tissues and employs multiple antennas that take turns to transmit ultra wideband (UWB) pulses while all antennas are used to receive the reflected signals. The MAMI methods we investigate herein utilize the data-adaptive robust Capon beamformer (RCB) to achieve high resolution and interference suppression. We demonstrate the effectiveness of our proposed methods for breast cancer detection via numerical examples with data simulated using the finite difference time domain (FDTD) method based on a 3-D realistic breast model

关键词： Microwave theory and techniques Microwave imaging Breast cancer Cancer detection Microwave antennas Receiving antennas Reflector antennas Transmitting antennas Ultra wideband antennas Finite difference methods

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A New Frequency Response Plot of Linear SISO systems

A New Frequency Response Plot of Linear SISO Systems

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Li Chai Lei Wang Qian He Department of Electrical and Computer Systems Engineering Monash University VIC Australia Institute of Information and Control Hangzhou Dianzi University Hangzhou China

The projection of the Nyquist diagram of a SISO linear system onto the Riemann sphere is recently used to represent the frequency responses. However, it is difficult to display the Riemann plot clearly in a plane since the Riemann sphere is a three dimensional object. To address this problem, the map projection of Riemann plot is introduced to obtain a two dimensional plot. The new frequency response plot plays the same role in modern robust control as Riemann plot, and easy to draw in a plane

关键词： Frequency response Linear systems H infinity control control systems Three dimensional displays Robust control Stability analysis Stability criteria Uncertainty systems engineering and theory

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Layering As Optimization Decomposition: Current Status and Open Issues

Layering As Optimization Decomposition: Current Status and O...

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Annual Conference on Information Sciences and systems (CISS)

作者： Mung Chiang Steven H. Low A. Robert Calderbank John C. Doyle Electrical Engineering Department Princeton University USA Computer Science and Electrical Engineering Department Caltech USA Electrical Engineering and Mathematics Departments Princeton University USA Control and Dynamic Systems Department Caltech USA

Network protocols in layered architectures have historically been obtained on an ad-hoc basis, and much of the recent cross-layer designs are conducted through piecemeal approaches. Network protocols may instead be holistically analyzed and systematically designed as distributed solutions to some global optimization problems in the form of generalized network utility maximization (NUM), providing insight on what they optimize and structures of the network protocol stack. This paper presents a short survey of the recent efforts towards a systematic understanding of "layering" as "optimization decomposition", where the overall communication network is modeled by a generalized NUM problem, each layer corresponds to a decomposed subproblem, and the interfaces among layers are quantified as functions of the optimization variables coordinating the subproblems. Furthermore, there are many alternative decompositions, each leading to a different layering architecture. Industry adoption of this unifying framework has also started. Here we summarize the current status of horizontal decomposition into distributed computation and vertical decomposition into functional modules such as congestion control, routing, scheduling, random access, power control, and coding. Key messages and methodologies arising out of many recent work are listed. Then we present a list of challenging open issues in this area and the initial progress made on some of them.

关键词： Protocols Design optimization Cross layer design Utility programs Communication networks computer architecture Distributed computing Routing Job shop scheduling Processor scheduling

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Layering As Optimization Decomposition: Framework and Examples

Layering As Optimization Decomposition: Framework and Exampl...

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IEEE (first ITW conference of the year) Information Theory Workshop (ITW)

作者： Mung Chiang S.H. Low A.R. Calderbank J.C. Doyle Electrical Engineering Department Princeton University USA Computer Science and Electrical Engineering Departments Caltech USA Electrical Engineering and Mathematics Princeton University USA Control and Dynamic Systems Department Caltech USA

Network protocols in layered architectures have historically been obtained primarily on an ad-hoc basis. Recent research has shown that network protocols may instead be holistically analyzed and systematically designed as distributed solutions to some global optimization problems in the form of Network Utility Maximization (NUM), providing insight into what they optimize and structures of the network protocol stack. This paper presents a short survey of the recent efforts towards a systematic understanding of 'layering' as 'optimization decomposition', where the overall communication network is modeled by a generalized NUM problem, each layer corresponds to a decomposed subproblem, and the interfaces among layers are quantified as functions of the optimization variables coordinating the sub-problems. Different decompositions lead to alternative layering architectures. We summarize several examples of horizontal decomposition into distributed computation and vertical decomposition into functional modules such as congestion control, routing, scheduling, random access, power control, and coding.

关键词： Wireless application protocol Design optimization Reverse engineering TCPIP Mobile ad hoc networks Utility programs Communication networks computer architecture Distributed computing Distributed algorithms

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Optimal Reconfiguration of the Navy Ship Power System using Agents

Optimal Reconfiguration of the Navy Ship Power System using ...

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IEEE PES Transmission and Distribution Conference and Exposition

作者： Momoh Diouf Center for Energy Systems and Control Department of Electrical & Computer Engineering Howard University College of Medicine Washington D.C. DC USA

This paper is a study of the optimization of a configuration and reconfiguration problem applied to the navy ship power system presenting a redundant power distribution layout. The multiagent method has been applied in order to make the power system converge towards its optimal configuration in its initial start up and during normal operation when a reconfiguration is required. The optimal process has been achieved by the agents and the simulations have been conducted with different cases of operation mode of the navy ship. The optimal configurations were derived through a program written in C++ for the agents and the results confirm the feasibility of applying the multiagent method for optimizing the navy ship power system

关键词： Marine vehicles Power systems Circuit breakers Power system simulation Optimization methods Power system faults Circuit faults control systems Power distribution Load management

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Single differential modulation and detection for MPSK in the presence of unknown frequency offset

Single differential modulation and detection for MPSK in the...

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40th Asilomar Conference on Signals, systems, and computers, ACSSC '06

作者： Liu, Jianhua Stoica, Petre Simon, Marvin Li, Jian Department of Electrical and Systems Engineering Embry-Riddle Aeronautical University Daytona Beach FL 32114 United States Department of Systems and Control Uppsala University P.O. Box 337 SE-75105 Uppsala Sweden Jet Propulsion Laboratory MS 238-343 4800 Oak Grove Drive Pasadena CA 91109 United States Department of Electrical and Computer Engineering University of Florida P.O. Box 116130 Gainesville FL 32611-6130 United States

ISBN: (纸本)1424407850

We consider improving the performance of communications over unknown channels with unknown frequency offsets. In lieu of the commonly suggested double differential (DD) modulation/detection, we consider single differential (SD) modulation/detection. We propose an approach that first estimates and compensates for the frequency offset and then detects using an existing multiple symbol detector for SD modulation. We introduce a simple data-symbol- independent frequency offset estimation method, which is reasonably accurate when using a data block larger than the one used for detection. Simulation results show that the SD modulation/detection approach proposed herein can significantly outperform the DD modulation/detection schemes.

关键词： Signal detection

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