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15th International Conference on control, automation and Systems, ICCAS 2015

作者： Ngo, Ha-Quang-Thinh Nguyen, Quoc-Chi Kim, Won-Ho Control and Automation Lab Department of Mechatronics Engineering Ho Chi Minh City University of Technology Viet Nam Department of Mechatronics Engineering Ho Chi Minh City University of Technology Viet Nam Department of Intelligent System Engineering Dong-Eui University Busan Korea Republic of

ISBN: (纸本)9788993215090

In this paper, a method to implement the input shaping control in Mechatrolink-III motion system is introduced. Firstly, the underdamped system is theoretically built by modeling. Then, the motion controller of Mechatrolink-III network is designed to apply the input shaper for reducing residual vibration in manufacturing machine. Later, the experimental beam is set-up to verify the effective performance of input shaping technique. The validity of the control strategy is practically performed by testing ZV, ZVD and ZVDD input shapers. Especially, the successful implementation provides an opportunity to apply the input shaper for multi-axes since Mechatrolink-III motion controller supports up to 32 axes. © 2015 Institute of control, Robotics and Systems - ICROS.

关键词： Motion control

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DSC-Based Implementation for Power control of DFIG in Microgrid Applications

DSC-Based Implementation for Power Control of DFIG in Microg...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Burak Soner Tarik Uzunovic Emre Ozsoy Edin Golubovic Asif Sabanovic Mechatronics Sabanci University Control and Automation Engineering Istanbul Technical University

ISBN: (纸本)9781479917631

This paper presents a compact and low cost digital signal controller (DSC) based implementation for power control of a doubly fed induction generator (DFIG) based wind energy setup for micro-grid applications. The experimental setup consists of a back to back converter, a 1.1 kW DFIG and two low cost, industry standard DSCs. Stator active power and reactive power are controlled by means of the rotor currents. Decoupled components of the rotor current in a rotating frame are controlled by a robust, disturbance observer based control structure. The proposed controller was validated through experiments.

关键词： DFIG Microgrid Power control Vector control Digital signal controller

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A case study in Istanbul E-80: Intelligent speed change at the highway for reducing gas emission

A case study in Istanbul E-80: Intelligent speed change at t...

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International Conference on Models and Technologies for Intelligent Transportation Systems, MT-ITS 2015

作者： Öner, Alper Günel, Gülay Öke Istanbul Technical University Mechatronics Education and Research Center Maslak Campus Istanbul34469 Turkey Istanbul Technical University Department of Control and Automation Engineering Maslak Campus Istanbul34469 Turkey

ISBN: (纸本)9789633131428

Greenhouses gases (GHGs) are a major problem in the world since they cause warming of the atmosphere and climate change which lead to global warming. Gasoline from transportation systems is the main source of GHGs. Frequent acceleration processes in vehicles cause unnecessary fuel consumption. If unnecessary acceleration is prevented, emission of GHGs will be reduced. In this research, unnecessary acceleration is decreased by changing line speed limit with an intelligent method at the highway. We propose an intelligent speed change (ISC) algorithm, which estimates the number of vehicles waiting in the traffic and calculates a speed limit to decrease unnecessary accelerations. A case study is done to reduce the gas emission at Istanbul E-80 highway with Istanbul Technical University City Transportation Simulation (ITUCiTSim) program. Test section is selected as Şekerpinar-Selimpaşa at one direction. An Intelligent Highway is constructed by placing sensors at access road connections. Traffic on the road is modelled by using the main principles of queueing theory. Information that is acquired by sensors is used in determining new speed limit in an intelligent way. It is demonstrated by simulations that the proposed method leads to a decrease in unnecessary accelerations, which results in a subsequent decrease in emitted GHGs. © 2015 BME.

关键词： Gas emissions

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Nonlinear adaptive control of a 3D overhead crane 15

Nonlinear adaptive control of a 3D overhead crane

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15th International Conference on control, automation and Systems, ICCAS 2015

作者： Nguyen, Quoc Chi Ngo, Ha-Quang-Thinh Kim, Won-Ho Department of Mechatronics Ho Chi Minh City University of Technology Viet Nam Control and Automation Lab Department of Mechatronics Ho Chi Minh City University of Technology Viet Nam Department of Intelligent System Engineering Dong-Eui University Busan Korea Republic of

ISBN: (纸本)9788993215090

In this paper, a nonlinear adaptive control of a 3D overhead crane is investigated. A dynamic model of the overhead crane is developed, where the crane system is assumed as a lumped mass model. Under the mutual effects of the sway motions of the payload and the hoisting motion, the nonlinear behavior of the crane system is considered. A nonlinear control model-based scheme is designed to achieve the three objectives: (i) drive the crane system to the desired positions, (ii) suppresses the vibrations of the payload, and (iii) velocity tracking of hoisting motion. The nonlinear control scheme employs adaptation laws that estimate unknown system parameters, friction forces and the mass of the payload. The estimated values are used to compute control forces applied to the trolley of the crane. The asymptotic stability of the crane system is investigated by using the Lyapunov method. The effectiveness of the proposed control scheme is verified by numerical simulation results. © 2015 Institute of control, Robotics and Systems - ICROS.

关键词： Lyapunov methods

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An improving analytically model with high accuracy for a micro manipulator

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Journal of Information Hiding and Multimedia Signal Processing 2015年第6期6卷 1242-1249页

作者： Ni, Yuan Deng, Zong-Quan Li, Jun-Bao Wu, Xiang Li, Long Research Center of Aerospace Mechanism and Control School of Mechatronics Engineering Harbin Institute of Technology China Shanghai Key Laboratory of Mechanical Automation and Robotics SSchool of Mechatronic Engineering and Automation Shanghai University China

A proposed mathematical model is established for modal analysis of a micro manipulator. According to the geometric characteristics of the manipulator, the model is built by using finite element method with multipoint constraint equations, and the corresponding displacement coordinate matrix is obtained after that. Considering that the regular flexure hinge plays a key role, in this analysis process, the hinge is treated as a varied cross-section Euler-Bernoulli beam element and the finite element model is established by a new procedure which followed the element internal equilibrium principle consequently. The stiffness matrix, the mass matrix and the exact shape functions of the non-prismatic beam element can be obtained respectively. Furthermore, the influences of geometric parameters on the fundamental frequency can also be discussed. © 2015 Ubiquitous International. All rights reserved.

关键词： Natural frequencies

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Disturbance attenuation of asymmetric structure by LMI based optimal state feedback controller with saturated actuators

Disturbance attenuation of asymmetric structure by LMI based...

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International Conference on Modeling, Simulation and Applied Optimization (ICMSAO)

作者： Mert Sever Hakan Yazici Gulay Goktas Ibrahim Beklan Kucukdemiral Department of Mechatronics Engineering Yildiz technical University Istanbul Turkey Department of Control and Automation Engineering Yildiz technical University Istanbul Turkey

This paper is concerned with the design of linear matrix inequalities (LMIs) based optimal state-feedback controller design for seismically excited asymmetric structures (AS) having stiffness irregularities. The system is modelled in terms of mass, natural frequencies, damping ratio and eccentricities to easily obtain torsionally flexible (TF) model. A one storey, two-way asymmetric structural system is used to illustrate the effectiveness of the approach through simulations. The modelled system has bi-lateral and rotational degrees of freedom. Frequency responses show the effectiveness of proposed controller by means of a decrease in the peak values of translation at each resonance frequency. Moreover, the time domain simulation results, acquired by using real time-history data of San Francisco and El Centro Earthquakes also show that proposed controller is very effective in reducing vibration amplitudes of each direction by applicable control signals and guaranteeing the stability of the closed loop system.

关键词： Earthquakes Damping Actuators State feedback Ellipsoids Resonant frequency Acceleration

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An improved wavelet filtering algorithm for NMR spin echo

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Journal of Information and Computational Science 2015年第8期12卷 2911-2918页

作者： Ma, Shuangbao Gao, Hongliang Li, Kong College of Automation Huazhong University of Science and Technology Wuhan China College of Mechanical Engineering and Automation Wuhan Textile University Wuhan China College of Mechatronics and Control Engineering Hubei Normal University HuangshiHubei China

An improved wavelet filtering algorithm is put forward based on the mean-value filtering function in this paper for the spin echo signal of Nuclear Magnetic Resonance Logging (NMRL), the Signal to Noise Ratio (SNR) of which is always very low. The detailed steps of this improved algorithm, which includes the advantages of mean-value filtering and wavelet filtering algorithm respectively, are designed based on the wavelet-based threshold filtering method. This paper also builds a 32-point forward model of big porosity in order to generate the spin echo signal with adjustable SNR for an experiment. The median filtering, wavelet hard threshold filtering, wavelet soft threshold filtering and the improved filtering algorithm are used to filter the constructed spin echo signal. The filtering effects of these four algorithms are analyzed while the SNR and the Root Mean Square Error (RMSE) are also calculated out. The results of this experiment and the application of these algorithms show that this improved wavelet filtering algorithm can improve the SNR and enhance the useful signal in dealing with the signal of nuclear magnetic resonance spin echo. Copyright © 2015 Binary Information Press.

关键词： Signal to noise ratio

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Discrete Sliding Mode control for a Non-minimum Phase Electro-hydraulic Actuator System

Discrete Sliding Mode Control for a Non-minimum Phase Electr...

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Asian control Conference

作者： R. Ghazali Y. M. Sam M. F. Rahmat C. C. Soon H. I. Jaafar Zulfatman Center for Robotics and Industrial Automation Faculty of Electrical Engineering Universiti Teknikal Malaysia Melaka Department of Control and Mechatronics Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia

ISBN: (纸本)9781479978632

The main objective of this paper is to perform a robust controller design using discrete-time sliding mode control (DSMC). In the control scheme, two-degree-of-freedom (2-DOF) control strategy turns the DSMC, which generally utilized state feedback into output feedback controller. The designed control scheme is considered with feedback and feedforward combination by implementing the zero phase error tracking control (ZPETC), which particularly intended for the nonminimum phase electro-hydraulic actuator (EHA) system application. In the experimental works, a sinusoidal trajectory with different frequencies is employed to assess the DSMC performance under nonlinear and uncertain condition. Experimental results show the DMSC with perfect tracking control approach is capable to reduce the phase lag occurred due to nonlinear phenomenon. The proposed controller also is highly robust under various points of trajectories and significantly shows enhancement in tracking control performance as compared to the conventional controllers.

关键词： Output feedback control Discrete sliding mode control Zero-phase-error-tracking control Electro-hydraulic actuator system

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A direct expert controller design for speed control of DC motor

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Journal of Computational Information Systems 2015年第1期11卷 229-236页

作者： Gao, Hongliang Ma, Shuangbao Zhan, Xisheng College of Mechatronics and Control Engineering Hubei Normal University Huangshi China School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan China College of Mechanical Engineering and Automation Wuhan Textile University Wuhan China

This article presents a direct expert controller for speed control of DC motor. The DC motor speed control system is selected as the controlled object. The transfer function model and the difference equation model of a separately excited DC motor are constructed for controller design. In controller design, four rules according to the error and change in error of motor speed are gained. By simulation experiments, the detailed parameters are determined for basic expert controller and direct expert controller. The simulation results demonstrate that the direct expert controller has the best control effect in transient response and steady state error than PID controller and basic expert controller. ©, 2014, Journal of Computational Information Systems. All right reserved.

关键词： Three term control systems

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On bistability in genetic double-negative feedback loop with positive autoregulations 33

On bistability in genetic double-negative feedback loop with...

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第三十三届中国控制会议

作者： LING Guang HE Ding-Xin GUAN Zhi-Hong ZHANG Xian-He ZHAN Xi-Sheng College of Automation Huazhong University of Science and Technology College of Mechatronics and Control Engineering Hubei Normal University

ISBN: (纸本)9781479947249

This paper focuses on bistability in a class of simplified double-negative feedback loop with positive autoregulations(DNFLPAs). The existence criteria of multiple equilibriums is established and the stability conditions are derived for each equilibrium. The effect of each biochemical parameters on bistability is explained. At last, several numerical simulations are carried out to deepen our analysis.

关键词： Multistability,Double-negative feedback loop,Positive autoregulation,Genetic Regulatory Networks.

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