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3rd IFAC Conference on Intelligent Control and automation Science, ICONS 2013

作者： Cai, Xin Li, Shaoyuan Li, Ning Li, Kang Department of Automation Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Shanghai 200240 China School of Electronics Electrical Engineering and Computer Science Queen's University Belfast Belfast BT7 1NN United Kingdom

ISBN: (纸本)9783902823458

This paper investigates variation of infinite horizon (IH) performance of Model Predictive Control (MPC) without constraints as the optimization horizon changes. By exploring properties of the Difference Riccati Equations (DRE), an upper bound and a lower bound of the ratio between variation of IH performance of MPC and finite horizon (FH) optimal cost are obtained. The result shows the dynamic behavior of IH performance of closed-loop MPC systems as the optimization horizon varies. Copyright © 2013 IFAC.

关键词： Model predictive control

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Sensor data quality assessment for building simulation model calibration based on automatic differentiation

Sensor data quality assessment for building simulation model...

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2013 IEEE International Conference on automation Science and engineering, CASE 2013

作者： Li, Sisi Song, Zhen Zhou, Mengchu Lu, Yan Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07013 United States Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 201804 China Department of Automation and Control Siemens Corporation Corporate Technology Princeton NJ 08540 United States

ISBN: (纸本)9781479915156

Building simulation models play a vital role in optimal building climate control, energy audit, fault detection and diagnosis, continuous commissioning, and planning. Real system parameters are often unknown or partially unknown and need to be identified through historical data, which are currently acquired by heuristically designed experiments. Without quality sensor data, model calibration is prone to fail, even if the calibration algorithm is appropriate. In this paper, we propose a Fisher-information-matrix (FIM)-based metric to examine the sensor data measurements and how their quality is related to the model calibration quality. It aims to provide quantitative guidance in the calibration cycle of a whole building model that takes as many variables as possible into consideration for the sake of accuracy. Our concerned model is based on well-known physical laws and tries to avoid simplification, thereby leading to a highly discontinuous system with model switches due to the seasonal or daily variation and other reasons. Such a model is implemented in the form of a software package. Hence, no explicit mathematical expression can be given. A key technical challenge is that the complexity of the model prohibits the analytical derivation of FIM, while the numeric calculation is sensitive to sensor noise and model switches. We, hence, propose to adopt an automatic differentiation method, which exploits the operator overload feature of object oriented programming language, for robust numerical FIM calculation. © 2013 IEEE.

关键词： Numerical methods

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Reducing Torque Pulsation in Interior Permanent Magnet Machine with FSCW for Hybrid Electric Vehicle

Reducing Torque Pulsation in Interior Permanent Magnet Machi...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Aimeng Wang Chunmei Wang Longya Xu Yazan Alsmadi State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Department of Electrical & Computer Engineering The Ohio State University

ISBN: (纸本)9781479902255

This paper analyzes and studies the methods of reducing torque pulsation in interior permanent magnet (IPM) machines with fractional-slot concentrated-winding (FSCW) for hybrid electric vehicles. Several methods are proposed to reduce the cogging torque and ripple torque for the IPM machine. Two finite element analysis (FEA) models of the IPM machine, including FSCW and integer-slot distributed windings, are studied in order to verify the proposed method. Finally, the performance of the machine with these two windings, including the flux-weakening capabilities, is compared. The comparison results show that the machine with FSCW has lower torque pulsation and wider speed range of constant power than the machine with integer-slot winding.

关键词： Interior permanent magnet (IPM) Fractional-slot concentrated-winding (FSCW) Finite element analysis (FEA) Torque pulsation torque ripple machine Hybrid electric vehicles interior permanent magnet machine speed range constant power

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An open-source development and simulation platform for smart wheelchairs

An open-source development and simulation platform for smart...

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6th International Conference on Intelligent Robotics and Applications, ICIRA 2013

作者： Liao, Wenlong Chen, Weidong Wei, Zhixuan Zhang, Wenxi Wang, Jingchuan Li, Kang Department of Automation and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University Shanghai 200240 China Harbin 150001 China Electrical Engineering and Computer Science Queen's University Belfast Belfast BT9 5AH United Kingdom

ISBN: (纸本)9783642408519

Simulator for smart wheelchairs is of great significance for both driver training and algorithm design. A development and simulation platform for wheelchairs is presented in this paper. On this platform, simulations of kinematics, dynamics and sensors are integrated, and a virtual prototype of wheelchair and virtual world are modled also. The sensors include encoders, a laser range finder and a set of Kinect. This platform is implemented in Gazebo and ROS, and is completely open source and freely available. Experiments verifies that this platform can be used as a valid tool for driver training and algorithm design. © 2013 Springer-Verlag Berlin Heidelberg.

关键词： Virtual reality

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Human interest oriented heterogeneous multi-robot exploration under connectivity constraints

Human interest oriented heterogeneous multi-robot exploratio...

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IEEE International Conference on Robotics and Biomimetics

作者： Han Zhang Weidong Chen Jingchuan Wang Kang Li Department of Automation Key Laboratory of System Control and Information Processing Shanghai Electronics and Electrical Engineering and Computer Science Queen's University Belfast Belfast UK

ISBN: (纸本)9781479927456

Human interest input could greatly enhance the efficiency of the multi-robot exploration. However, most of the previous work did not take the intention of the operator into account. In this paper, a human interest oriented multi-robot exploration system is designed. The system is composed of a mobile base station and several robot explorers. A human interest oriented task allocation method is developed to enable these robot explorers to coordinate based on the operator's intention. Furthermore, an optimization index is proposed to balance the obedience, connectivity and explorability of the system; and the optimization problem is solved to generate the movements of the mobile base station and the robot explorers. Simulations and real-world experiments have demonstrate the effectiveness of the system and the efficiency of the exploration process.

关键词： Robot kinematics Base stations Optimization Resource management Equations Mobile communication

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Smart Meters in Smart Grid: An Overview

Smart Meters in Smart Grid: An Overview

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IEEE Green Technologies Conference (IEEE-Green)

作者： Jixuan Zheng David Wenzhong Gao Li Lin Department of Electrical and Computer Engineering University of Denver USA State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University China

Smart meter is one of the most important devices used in the smart grid (SG). The smart meter is an advanced energy meter that obtains information from the end users' load devices and measures the energy consumption of the consumers and then provides added information to the utility company and/or system operator. Several sensors and control devices, supported by dedicated communication infrastructure, are utilized in a smart meter. This paper outlines some smart meter's aspects and functions of smart meter. In addition, it introduces two basic types of smart meter system's communication technologies: Radio Frequency (RF) and power Line Carrier (PLC) and recent advances with regard to these two technologies. This paper also presents different policy and current status as well as future projects and objectives of SG development in several countries. Finally, the paper compares some main aspects about latest products of smart meter from different companies.

关键词： Smart meters Electricity Government Companies Radio frequency Smart grids

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Gain-scheduling Distributed MPC for Polytopic Uncertain systems subject to Actuator Saturation

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IFAC Proceedings Volumes 2013年第13期46卷 444-449页

作者： Langwen Zhang Jingcheng Wang Kang Li Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 School of Electronics Electrical Engineering and Computer Science Queen's University Belfast UK

In this paper, we present a gain-scheduling distributed model predictive control (MPC) algorithm for polytopic uncertain systems subject to actuator saturation. A large-scale system is decomposed into subsystems and sub-controllers are designed independently. An invariant set condition is provided and a min-max distributed MPC strategy is proposed based on the invariant set. The distributed MPC controller is determined by solving a linear matrix inequality (LMI) optimization problem. An iterative algorithm is provided to coordinate the sub-controllers. A numerical example is carried out to demonstrate the effectiveness of the proposed algorithm.

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Modeling and control of aggregated air conditioning loads under realistic conditions

Modeling and control of aggregated air conditioning loads un...

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Innovative Smart Grid Technologies (ISGT)

作者： Chin-Yao Chang Wei Zhang Jianming Lian Karanjit Kalsi Department of Electrical and Computer Engineering Ohio State University Columbus OH USA Advanced Power and System Group Pacific Northwest National Laboratory Richland WA USA

Demand-side Demand-side control is playing an increasingly important role in smart grid control strategies. Modeling the dynamical behavior of a large population of appliances is especially important to evaluate the effectiveness of various load control strategies. In this paper, a high accuracy aggregated model is first developed for a population of HVAC units. The model efficiently includes statistical information of the population, systematically deals with heterogeneity, and accounts for a second-order effect necessary to accurately capture the transient dynamics in the collective response. Furthermore, the model takes into account the lockout effect of the compressor in order to represent the dynamics of the system under control more accurately. Then, a novel closed loop load control strategy is designed to track a desired demand curve and to ensure a stable and smooth response.

关键词： Sociology Statistics Load modeling Aggregates Mathematical model Atmospheric modeling Vectors

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Global Leader-Following Consensus of a Group of Multiple Integrator Agents Using Bounded Controls

Global Leader-Following Consensus of a Group of Multiple Int...

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第三十二届中国控制会议

作者： Zhiyun Zhao Zongli Lin Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia

ISBN: (纸本)9781479900305

This paper studies the global leader-following consensus problem for a multi-agent system using bounded controls. Both the agents and the leader are described by a chain of integrators of arbitrary length. A saturated linear feedback control law is constructed for each system in the group. These feedback laws use a multi-hop relay protocol, in which each agent obtains the information of other agents through multi-hop paths in the communication network, and the feedback gains are constructed from the adjacency matrix of the communication network. It is shown that global leader-following consensus is achieved under the feedback control laws we have constructed when the communication topology among follower agents is a strongly connected and detailed balanced directed graph and the leader is a neighbor of at least one follower. Simulation results are given to illustrate the theoretical results.

关键词： Multi-agent systems, leader-following consensus, bounded control, actuator saturation

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A Practical Sizing Method of Energy Storage system Considering the Wind Uncertainty for Wind Turbine Generation systems

A Practical Sizing Method of Energy Storage System Consideri...

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IEEE Green Technologies Conference (IEEE-Green)

作者： David Wenzhong Gao Hamed Babazadeh Li Lin Department of Electrical and Computer Engineering University of Denver Denver CO USA State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing China

In this paper, we introduce a new method for finding the proper size of energy storage system (ESS). This design is dedicated to reduce the size of ESS considering the uncertainty of wind speed. It considers the statistical behavior and also the state of charge (SOC) of ESS. The impact of wind uncertainty on power production and its impact on the SOC of ESS are studied. The optimization is done by using the defined uncertainty limits and some other criteria. The probability density function and cumulative density function are calculated in this method. The presented method provides a significant reduction in the size of ESS in terms of power and energy capacity which consequently reduces a considerable capital cost of ESSs for applications in wind turbine generators. The main goal of this design is to reduce the unnecessarily large capacity of ESS which causes the high cost of ESS.. All the calculations and plotting are done using MATLAB.

关键词： Wind turbines Uncertainty Wind power generation Wind forecasting Wind speed Batteries

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