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2014 4th IEEE International Conference on Information Science and Technology

作者： Xiangyu Zhi Zaijin Li Zeyang Xia Qunfei Zhao Gang Yu Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences and The Chinese University of Hong Kong Harbin Institute of Technology (HIT) Shenzhen Graduate School Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China

Studies have shown that applying a vibration of certain frequencies and intensities on the tooth can accelerate tooth movement, thus shorten orthodontic treatment *** optimal frequency may be related to the natural frequency of the tooth-periodontal ligament(PDL)-bone complex(TPBC),therefore we designed a vibrating device which can measure the natural frequency of the TPBC, and produce vibration load with customized frequencies and intensities. This device consists of four parts, vibration source, vibration frequency modulator,vibration amplitude modulator, natural frequency measurement module. To optimize the vibrator's design, specifically structure and natural frequency, static analysis and modal analysis were both made. The application method of the vibrator is also introduced. The designed vibrator can customize vibration load and obtain the natural frequency of TPBC, and it will be used for experiments to obtain the relation between the optimal frequency and the natural frequency of TPBC.

关键词： Development of a Vibrator Used for Accelerating Orthodontic Treatment

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Input Load Disturbance Rejection of Non-Minimum Phase Processes Using Disturbance Observer control Scheme

Input Load Disturbance Rejection of Non-Minimum Phase Proces...

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第三十二届中国控制会议

作者： SUN Bo ZHANG Wei ZHANG Weidong CAI Yunze Shanghai Jiao Tong University Shanghai 200240 Key Laboratory of System Control and Information ProcessingMinistry of Education of Chinaand Department of Automation

ISBN: (纸本)9781479900305

This article proposes a systematic disturbance observer(DOB) control scheme for open-loop non-minimum phase (NMP) plants with time delay.A novel optimal analytical result of the input disturbance rejection criterion is derived and optimal analytical solutions of both the set-point tracking controller and the DOB are provided in terms of H2 norm performance *** the set-point tracking performance specification and input load disturbance specification can be quantitatively achieved by conveniently tuning the adjustable *** typical first order NMP process with time delay is analyzed based on the proposed control structure,and a simulation example is *** simulation results verify that the proposed scheme can eliminate the influence of input load disturbance and the ISE specification can be quantitatively tuned.

关键词： Non-minimum phase processes disturbance observer input load disturbance rejection 2-norm

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Circulating fluidized bed coal-saving optimization control method

Communications in Computer and Information Science

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Communications in Computer and Information Science 2013年 355卷 303-312页

作者： Jiang, Tengfei Yin, Debin Li, Dewei Xi, Yugeng Zhou, Wu Department of automation Shanghai Jiao Tong University Ministry of Education Key Laboratory of System Control and Information Processing Shanghai 200240 China CO. LTD Shanghai 200241 China

The circulating fluidized bed boiler is widely used in thermal power plants. With the proposal of energy-saving emission reduction, how to reduce coal consumption while ensure the output steam quality at the same time has become an important topic. This paper combines the technology of RTO (real-time optimization) and zone control in DMC (dynamic matrix control) to achieve this goal. The proposed method adds the coal consumption into the objective function of DMC controller and the operation point of the boiler is permitted to change within a zone which can be set according to the actual requirements of the circulating fluidized bed boiler. The zone control in DMC provides the freedom to reduce the coal consumption and achieves the economic optimal target. Compared to the simple use of constrained DMC control, the proposed method is verified to be remarkable coal-saving by the case study of a 150 t/h boiler of a power plant in Sichuan. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Emission control

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Model Predictive control with Swithing Strategy for a Train system

Model Predictive Control with Swithing Strategy for a Train ...

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International Conference on control, Automation, Robotics & Vision

作者： Yan Luo Dewei Li Yugeng Xi Key Laboratory of System Control and Information Processing Ministry of Education Department of Automation Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781479952007

For automatic train operation (ATO) system, the main object of ATO controller is to control the moving of the train as close as possible to the target curve, so that the demands for time, safety, travelling comfort and energy saving can be met. In this paper, a model predictive control (MPC) strategy is introduced to control the train system due to its good performance and ability to handle system with time-delay and constraints. Model parameters can be identified by measured data. The proposed MPC algorithm with corresponding switching strategy is designed. The simulation results illustrate the feasibility and effectiveness of the proposed control scheme.

关键词： ATO model predictive control train system switching strategy

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Robust fault tolerant control on distributed networked control systems with quantized states

Robust fault tolerant control on distributed networked contr...

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World Congress on Intelligent control and Automation (WCICA)

作者： Yang Ge Jingcheng Wang Yi Zhang Kang Li Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Shanghai China Shanghai Urban-Rural Construction and Transportation Development Research Institute Shanghai China Electrical Engineering and Computer Science Queen's University Belfast Belfast UK

The distributed networked control systems are considered in this paper. Several sub-systems which are connected with each other through a communication network make up the whole system. Each sub-system has its own quantizer so that any information which needs be transmitted to other sub-systems will be quantized due to limited bandwidth. Meanwhile, the actuator faults, including outage, loss of effectiveness and stuck are also considered in our research. A mode-based state feedback controller is given in this paper to stable such NCSs and to meet the robust H-inf performance. A simulation example is proposed to illustrate the effectiveness of our method finally.

关键词： Quantization (signal) Networked control systems State feedback Closed loop systems Communication networks Actuators Fault tolerance

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Harmonic wave analysis and suppression research on three-phase SPWM inverter

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Information Technology Journal 2013年第12期12卷 2366-2373页

作者： Xie, Hui Li, Hongbing Liu, Heping Chen, Qiang Key Laboratory of Signal and Information Processing Chongqing Three Gorges University Chongqing 404100 China College of Automation Chongqing University Chongqing 400030 China State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400030 China

The output voltage of the Sinusoidal Pulse Width Modulation (SPWM) inverter contains various ultra harmonics. It increases the system's power consumption and generates the harmonic interference. By establishing the mathematical model of the three-phase inverter and doing the FFT transformation on the output voltage, it analyses the relation between the output voltage and the combined conduction states of the inverter's switches during one waveform cycle, it also analyzes the main parameters, modulation ratio of the voltage and carrier signal which can affect the inverter's harmonic content. Simulation verifies the distribution regularities of each harmonic of SPWM inverter's output voltage. It indicates that SPWM modulation method can make the output harmonics high frequency, the harmonic characteristic and modulation depth are closely related to the carrier frequency. This study has great significance on the rational selection of modulation depth and carrier frequency, improvement of the inverter's efficiency and reduction of harmonic distortion. © 2013 Asian Network for Scientific Information.

关键词： Electric inverters

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Shadow removal based on physical features and morphological methods

Shadow removal based on physical features and morphological ...

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International Conference on Communication, Electronics, and Automation Engineering, 2012

作者： Zhang, Chao Liu, Shao Jie Zhao, Yu Ming Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Shanghai 200240 China

ISBN: (纸本)9783642316975

In this paper an algorithm has been presented to remove the shadow from images, which includes two steps. First step is to detect shadow regions using physical features of shadow for an initial result with less shadow. Two properties of shadow, luminance and gray density are taken into account, to get the primary result. The second step is based on morphological methods. Using the similarity of gray density and the gradient value, a refined result can be obtained with the help of real edge of the object and the direction to expand. © 2013 Springer-Verlag.

关键词： Tracking (position)

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Multi-rate model predictive control to reject periodic disturbance with reduced ripple

Multi-rate model predictive control to reject periodic distu...

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3rd IFAC Conference on Intelligent control and Automation Science, ICONS 2013

作者： Jin, Mengke Li, Dewei Xi, Yugeng Department of Automation Shanghai Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University 200240 China

ISBN: (纸本)9783902823458

Repetitive model predictive control is an effective method to track a periodic signal as well as reject a periodic disturbance. However, since repetitive controller uses discrete-time model, there always exists ripple when controlling a continuous system with periodic disturbance. This paper proposes a new way for repetitive model predictive control by using multi-rate model. Due to the multi-rate model, the model predictive controller can optimize the system outputs during the period between two sampling times, and then provide a more delicate control action, which can result in the reduced ripple. The simulation demonstrates its effectiveness. Copyright © 2013 IFAC.

关键词： Model predictive control

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control of single-phase CHB grid-connected photovoltaic system under non-uniform irradiation conditions

Control of single-phase CHB grid-connected photovoltaic syst...

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3rd IFAC Conference on Intelligent control and Automation Science, ICONS 2013

作者： Ma, Chao Wu, Jing Li, Ning Li, Shaoyuan Department of Automation Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Shanghai 200240 China

ISBN: (纸本)9783902823458

This paper proposes a novel MPPT method, which will provide a correct tracking direction under the condition of non-abrupt atmospheric changes, especially non-irradiation conditions. We also present a model predictive control method based on a cost function, which help to derive the predictions for each possible switching state. The control scheme obtained is capable of controlling the dc-link current to a desired MPPT reference current, while injecting sinusoidal current to the grid with reduced total harmonic distortion. Finally, the simulation results illustrate the effectiveness of our proposed method. Copyright © 2013 IFAC.

关键词： Model predictive control

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Repetitive Predictive control for systems Subject to Periodic Disturbance with Markov Jump Uncertainty

Repetitive Predictive Control for Systems Subject to Periodi...

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International Conference on control, Automation, Robotics & Vision

作者： Mengke Jin Jiwei Li Dewei Li Yugeng Xi Key Laboratory of System Control and Information Processing Ministry of Education Department of Automation Shanghai Jiao Tong University Shanghai 200240 China

ISBN: (纸本)9781479952007

In the consideration of constraints, repetitive model predictive control is an effective method to track a periodic signal as well as reject a periodic disturbance. However, in practical systems, it is difficult to determine the period of the disturbance;meanwhile, too much information is needed for the design of repetitive controller, thus will make it difficult for the design of controller. In this paper, a system subject to periodic disturbance with Markov jump uncertainty is considered and a new method of repetitive model predictive control with Markov jump model has been introduced to reject the disturbance. The simulation demonstrates that the proposed method is effective.

关键词： periodic disturbance control systems Predictive control Markov jump Repetitive controllers Repetitive controller design Model predictive control

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