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International MultiConference of Engineers and Computer Scientists, IMECS 2014

作者： Muhammad, Abdul Kadir Khan, Barlas Raheel Okamoto, Shingo Lee, Jae Hoon Center for Mechatronics and Control System Mechanical Engineering Department State Polytechnic of Ujung Pandang Jl. Perintis Kemerdekaan KM 10 Makassar90-245 Indonesia Mechanical Engineering Course Graduate School of Science and Engineering Ehime University 3 Bunkyo-cho Matsuyama790-8577 Japan

ISBN: (纸本)9789881925251

The purposes of this research are to formulate the equation of motion of the system, to develop computational codes by a finite-element method in order to perform dynamics simulation with vibration control, to propose an effective control scheme and to confirm the calculated results by experiments of a flexible link manipulator. The system used in this paper consists of an aluminum beam as a flexible link, a clamp-part, a servo motor to rotate the link and a piezoelectric actuator to control vibration. Computational codes on time history responses, FFT (Fast Fourier Transform) processing and eigenvalues -eigenvectors analysis were developed to calculate the dynamic behavior of the link. Furthermore, a control scheme using the piezoelectric actuator was designed to suppress the vibration. A proportional controller was designed and demonstrated its performances. The system and the proposed control scheme were confirmed through experiments. The calculated and experimental results revealed that the vibration of the flexible link manipulator can be controlled effectively.

关键词： Piezoelectric actuators

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Constrained Iterative Feedback Tuning for Robust High-Precision Motion control

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IFAC Proceedings Volumes 2014年第3期47卷 4915-4920页

作者： Bart J.C.H. Van der Velden Tom Oomen Marcel F. Heertjes Control Systems Technology Group Department of Mechanical Engineering Eindhoven University of Technology Eindhoven The Netherlands Mechatronics Technology Development ASML Veldhoven The Netherlands

The aim of this paper is to extend iterative feedback tuning (IFT), which is a data- based approach for controller tuning, with robustness constraints. Hereto a constrained IFT problem is formulated that is solved by introducing a penalty function. Essentially, the gradient estimates decompose into (a) the well-known IFT gradients and (b) the gradients with respect to this penalty function. Experimental results obtained from the motion control systems of an industrial wafer scanner confirm enhanced performance with guaranteed robustness properties.

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Optimization in Active Vibration control: Virtual Experimentation Using COMSOL Multiphysics - MATLAB Integration

Optimization in Active Vibration Control: Virtual Experiment...

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International Conference on Intelligent Systems, Modelling and Simulation

作者： Khairul A. M. Nor Asan G. A. Muthalif Azni N. Wahid Smart Structures Systems & Control Research Laboratory Department of Mechatronics Engineering International Islamic University Malaysia

ISBN: (纸本)9781479938599

This paper demonstrates optimization of collocated sensor-actuator location and the controller gains of active vibration control system. Ant colony optimization algorithm is employed for this purpose. Instead of using equation-based modeling for the system, the plant is a finite element model developed in COMSOL Multiphysics software, which later interfaced with the MATLAB-coded optimization algorithm using the Livelinkfor MATLAB feature. The benchmark model is a simply supported thin plate excited and attenuated by two piezoelectric patches. The optimization is based on the average energy reduction across a frequency range between 11 Hz to 50 Hz, which covers the first three modes. It is found that the maximum attenuation achieved is 68.31% using optimal values of sensor-actuator location and controller gains.

关键词： COMSOL Multiphysics - MATLAB integration Active vibration control Ant Colony Optimization

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Position tracking of pneumatic actuator with loads by using predictive and fuzzy logic controller

Position tracking of pneumatic actuator with loads by using ...

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1st International Manufacturing engineering Conference, iMEC 2013

作者： Mohd Faudzi, Ahmad Athif Mustafa, Nu'man Din Azman, M. Asyraf Osman, Khairuddin Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Department of Control and Mechatronics Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Department of Industrial Electronics Universiti Teknikal Malaysia Melaka Hang Tuah Jaya 76100 Durian Tunggal Melaka Malaysia

ISBN: (纸本)9783038350200

This paper presented two control approaches for position control of a pneumatic actuator, which are Generalized Predictive controller (GPC) and Proportional-Derivative Fuzzy Logic controller (PD-Fuzzy). Both controllers are designed using MATLAB/Simulink platform. The simulation results are then validated with real-time experiment. In order to test the controller's performance, external load is used and the results for both controllers are compared and analyzed. Results for both controllers show high accuracy and fast response for position tracking. © (2014) Trans Tech Publications, Switzerland.

关键词： Pneumatic actuators

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Mechanical properties investigation of monolayer h-BN sheet under in-plane shear displacement using molecular dynamics simulations

Mechanical properties investigation of monolayer h-BN sheet ...

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作者： Tian, Y. Li, Z. Gao, W. Cai, K. Wang, F. Zhang, D. Shirinzadeh, B. Fatikow, S. Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education Tianjin University Tianjin 300072 China Robotics and Mechatronics Research Laboratory Department of Mechanical and Aerospace Engineering Monash University Clayton VIC 3800 Australia Division of Microrobotics and Control Engineering University of Oldenburg 26111 Oldenburg Germany

The mechanical properties, including wrinkling patterns and fracture behavior, of monolayer h-BN sheets have been investigated using classic molecular dynamics simulations and continuum model. The wrinkling pattern formation and evolution have been first explored. The dependences of the wrinkling shape, amplitude, and wavelength, as well as wrinkling number on shear displacement are extensively elucidated. The influences of geometry and shear load direction, as well as temperature, on the fracture behavior have also been studied to obtain further insights into the properties of the monolayer h-BN sheets. © 2014 AIP Publishing LLC.

关键词： Monolayers

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Development of a fault detection approach based on SVM applied to industrial data 7

Development of a fault detection approach based on SVM appli...

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7th European Workshop on Structural Health Monitoring, EWSHM 2014

作者： Rother, Astrid Jelali, Mohieddine Söffker, Dirk Rolling and Metallic Coating Bochum ThyssenKrupp Steel Europe Essener Straße 244 Bochum44793 Germany Laboratory of Control Engineering and Mechatronics Cologne University of Applied Sciences Betzdorfer Straße Cologne50679 Germany Department of Dynamics and Control University of Duisburg-Essen Lotharstr. 1-21 Duisburg47057 Germany

In existing production plants, sensor systems and other sources provide information about the plant condition. This paper presents methods for how data can be conveniently summarized, treated, and evaluated to retain characteristic features and allocate them to certain faults respectively to use them for monitoring purposes. This work details the development of a method to be applied to selected data sets, and which then can be expanded for use in the real environment. This paper details a procedure developed for automated selection and processing to reduce the time exposure of qualified personnel. A number of possible methods of analysis were tested for their ability to point out conspicuous events, especially Wavelet Transformation for feature extraction and Support Vector Machines for classification. Data sets that are correlated to the different conditions of the system are used for training and testing. After training, the algorithm will be able to detect different faults in time. In today's practice, faults are analyzed after they have occurred. Applying the method, a major failure can be prevented by detecting contingency faults. Using real industrial data from the hot strip mill of ThyssenKrupp Steel Europe (TKSE), the developed approach will be tested offline for practical relevance. Copyright © Inria (2014).

关键词： Wavelet transforms

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Experimental study on elevator using encoderless magnetic motion (ICCAS 2014)

Experimental study on elevator using encoderless magnetic mo...

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International Conference on control, Automation and Systems ( ICCAS)

作者： Hong-Youn Kim Hoon Heo Young-Min Yun Young-Mok Kwon Department of Control and Instrumentation Engineering Korea University Seoul South Korea TPC Mechatronics Ltd Incheon South Korea

A Elevator system composed of a permanent magnet linear synchronous motor (PMLSM) as a stator and a magnetic plate as a mover is proposed in this paper. Rather than using a conventional encoder or resolver, position is measured by adopting a vector control method using two Hall sensors for generating a rectangular wave signal. This method estimates the velocity and position of a mover using the quadrature of two hall sensor signals instead of an encoder signal. Vector control of the PMLSM using two Hall sensors for generating a rectangular wave is proved to control the system in a stable and efficient manner through simulations. Hardware experiments reveal that the position control performance is within the range of 30~50μm with an accuracy of 10~20μm, a two-fold improvement over the conventional method. The proposed method exhibits an economical efficiency and practical usefulness. The vector control technique using two Hall sensors can be installed in a narrow place. Accordingly, the proposed method can be implemented in applications where conventional encoders or resolvers cannot operate.

关键词： Elevators Integrated optics Optical sensors Force Facsimile

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Low noise signal conditioning design for electrostatic sensors

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Sensors and Transducers 2013年第6期153卷 200-208页

作者： Tajdari, Teimour Rahmat, Mohd Fua'ad Wahab, Norhaliza Abdul Thuku, Iliya Tizhe Department of Control and Mechatronics Engineering UTM Skudai 81310 Johor Malaysia

The signal conditioning circuit of the electrostatic sensor is a small signal amplifier that collects and amplifies the detected electrostatic noise. Due to its high amplification properties, the output signal is highly susceptible to be defaced by intrinsic or extrinsic noise. This paper is proposed a low noise signal conditioning circuit for electrostatic sensor. A circuit model is proposed as the electrode of the sensor to be used in circuit design and circuit analysis. An electrostatic noise collector amplifier is designed using a high impedance FET operational amplifier. A dual power supply using a single battery is provided to isolate the circuit from 50 Hz extrinsic noise. The design is investigated for its gain, bandwidth and noise properties. The sensor test results verified the design objectives. The circuit can be used to design a low noise measurement system using an electrostatic sensor in powder and particle technologies. © 2013 IFSA.

关键词： Signal conditioning circuits

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Apical four-chamber echocardiography segmentation using Marker-controlled Watershed segmentation 3

Apical four-chamber echocardiography segmentation using Mark...

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3rd IEEE Conference on Biomedical engineering and Sciences, IECBES 2014

作者： Nakphu, Nonthaporn Dewi, Dyah Ekashanti Octorina Rizqie, Muhammad Qurhanul Supriyanto, Eko Mohd Faudzi, Ahmad Athif Kho, Dolwin Ching Ching Kadiman, Suhaini Rittipravat, Panrasee Department of Biomedical Engineering Faculty of Engineering Mahidol University Salaya Nakorn Pathom73170 Thailand IJN-UTM Cardiovascular Engineering Center University Technology Malaysia Skudai Johor81310 Malaysia IJN-UTM Cardiovascular Engineering Centre Faculty of Biosciences and Medical Engineering Universitas Sriwijaya Indonesia IJN-UTM Cardiovascular Engineering Center Control and Mechatronics Engineering Department University Technology Malaysia Skudai Johor81310 Malaysia National Heart Institute Kuala Lumpur50400 Malaysia AIM LAB Department of Biomedical Engineering Mahidol University Salaya Nakorn Pathom73170 Thailand

ISBN: (纸本)9781479940844

Echocardiography provides information about size, shape, and function of heart to create the image. Apical four-chamber echocardiography can be obtained by placing the ultrasound probe at the apex of the left ventricle. Such view enables to analyze heart abnormalities. In this regard, chamber quantification is recommended to evaluate the heart volume by defining the endocardial border of the chambers. Image segmentation that subdivides an image into different regions may be suitable to analyze the chambers. In this study, we propose a Marker-controlled Watershed segmentation method. It involves Watershed Transform, internal and external markers, and morphological processing. The advantage is that it can control over-segmentation due to noise and other local irregularities. We tested the proposed method on an apical four-chamber echocardiography image and a model image. We also compared the segmentation result with an Active Contour-based segmentation method. The results show that the Watershed Transform performs better than Active Contour. © 2014 IEEE.

关键词： Echocardiography

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Fuzzy supervisory backstepping controller for stabilization of quadrotor unmanned aerial vehicle

Fuzzy supervisory backstepping controller for stabilization ...

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International Conference on Intelligent and Advanced Systems, ICIAS

作者： Mohd Ariffanan Mohd Basri Abdul Rashid Husain Kumeresan A. Danapalasingam Universiti Teknologi Malaysia Skudai Johor MY Department of Control & Mechatronics Engineering Universiti Teknologi Malaysia Skudai Johor Malaysia

In this paper, a fuzzy supervisory backstepping controller (FSBC) is designed for the altitude and attitude stabilization of quadrotor unmanned aerial vehicle (UAV). The designed controller consists of a backstepping controller which can automatically select its parameters, on-line by a fuzzy supervisory mechanism. The stability criterion for the stabilization of the quadrotor is proven by the Lyapunov theorem. Numerical simulations using the dynamic model of a four degree of freedom (DOF) quadrotor UAV show the effectiveness of the approach. Besides, the simulation results indicate that the proposed design techniques can stabilize the quadrotor UAV with better performance than established linear design techniques.

关键词： Backstepping Fuzzy logic PD control Mathematical model Attitude control Vehicle dynamics

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