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IEEE International Conference on Mechatronics

作者： Ibrahim, B.S.K.K. Tokhi, M.O. Huq, M.S. Gharooni, S.C. Dept of Mechatronics and Robotics Faculty of Electrical and Electronic Engineering University Tun Hussein Onn Batu Pahat Johor Malaysia Department of Automatic Control and System Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781612844350

The use of electrical signals to restore the function of paralyzed muscles is called functional electrical stimulation (FES). FES is a promising method to restore mobility to individuals paralyzed due to spinal cord injury. FES induced movement control is a significantly challenging area, mainly emanating from various characteristics of the underlying physiological/biomechanical system. An approach of fuzzy trajectory tracking control of swinging motion optimized with genetic algorithm is presented. The results show the effectiveness of the approach in controlling FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated to perform the swinging motion by controlling the amount of stimulation pulsewidth © 2011 IEEE.

关键词： Fuzzy logic

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Microturbine Power Generator

Microturbine Power Generator

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The 2011 International Conference on Electric and Electronics(EEIC 2011)

作者： Martin Novak Jaroslav Novak Ondrej Stanke Jan Chysky Czech Technical University in Prague Faculty of Mechanical EngineeringDepartment of Instrumentation and Control Engineering

This paper describes some experience gained with a construction of an experimental testing stand for micro turbine power generation with highspeed permanent magnet synchronous motor and its *** main goal of this research is to create an affordable small(order of k W) power supply preferably for combined electrical energy and heat production,that could be used in households,portable power generators *** approach promises lower fuel consumption,lower emissions and better efficiencies that classical piston based portable power *** presented test stand parameters are 40000 RPM,torque 7Nm.

关键词： Microturbine,High speed permanent magnet motor,Torque control

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Design and manufacture an ultrasonic dispersion system with automatic frequency adjusting property

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Sensors and Transducers 2011年第3期126卷 52-63页

作者： Rahim, Herlina Abdul Bargoshadi, Javad Abbaszadeh Sarrafi, Sahar Abdul Rahim, Ruzairi Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

This paper a novel ultrasonic dispersion system for the cleaning application or dispersing of particles which are mixed in liquid has been proposed. The frequency band of designed system is 30 kHz so that the frequency of ultrasonic wave sweeps from 30 kHz to 60 kHz with 100 Hz steps. One of the superiority of manufactured system in compare with the other similar systems which are available in markets is that this system can transfer the maximum and optimum energy of ultrasonic wave inside the liquid tank with the high efficiency in the whole of the usage time of the system. The used ultrasonic transducers in this system as the generator of ultrasonic wave is the type of air coupled ceramic ultrasonic piezoelectric with the nominal maximum power 50 Watt. The frequency characteristic of applied piezoelectric is that it produces the maximum amplitude of ultrasonic wave on the resonance frequency, so this system is designed to work on resonance frequency of piezoelectric, continuously. This is done by the use of control system which is consisted of two major parts, sensing part and controlling part. The manufactured ultrasonic dispersion system is consisted of 9 piezoelectrics so that it can produce 450 watt ultrasonic energy, totally. The main purpose of this project is to produce a safety system especially for fatigue car driver so as to prevent from accidents. The statistic on road fatality shows that human error constitute of 64.84 % road accidents fatality and 17.4 % due to technical factors. These systems encompassed the approach of hand pressure applied on the steering wheel. The steering will be installed with pressure sensors. At the same time these sensors can be used to measure gripping force while driving. © 2011 IFSA.

关键词： Natural frequencies

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Review of tomographic imaging using finite element method

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Sensors and Transducers 2011年第12期135卷 1-19页

作者： Rahmat, Mohd Fua'ad Thuku, Iliya Tizhe Control and Instrumentation Engineering Department Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Bahru Malaysia

Many types of techniques for process tomography were proposed and developed during the past 20 years. This paper review the techniques and the current state of knowledge and experience on the subject, aimed at highlighting the problems associated with the non finite element methods, such as the ill posed, ill conditioned which relates to the accuracy and sensitivity of measurements. In this paper, considerations for choice of sensors and its applications were outlined and descriptions of non finite element tomography systems were presented. The finite element method tomography system as obtained from recent works, suitable for process control and measurement were also presented. © 2011 IFSA.

关键词： Finite element method

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Non-invasive evaluation of hydrogen peroxide concentrations in a drinking bottle by near-infrared spectrometry

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Sensors and Transducers 2011年第8期131卷 83-90页

作者： Abdul Rahim, Herlina Morat, Bashirun Che Abdul Rahim, Ruzairi Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

The purpose of this project is to determine the concentration of hydrogen peroxide (H2O2)over the unknown test sample. Near-infrared spectrometry (NIRS) is the spectroscopic technique used to assess the concentration of a chemical species based on the molar absorptivity in the Near-infrared(NIR) band. A multivariate statistical analysis tool will be applied to distinguish spectra for H2O and H2O2 through pre-processing stage. Then, multivariate regression method is applied to the preprocessed spectra to obtain calibration model. The calibration model is tested with test samples and the performance of the model is evaluated. © 2011 IFSA.

关键词： Hydrogen peroxide

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Bioelectrical impedance analysis device: Measurement of bioelectrical tissue conductivity in dengue patients

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Sensors and Transducers 2011年第2期125卷 256-265页

作者： Abdul Rahim, Herlina Taib, Mohd Nasir Ibrahim, Fatimah Abdul Rahim, Zuzairi Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

This paper describes and introduces a new approach to monitor dengue hemorrhagic fever using BIA technique. This technique is an in vivo technique where an approximately a small average constant current of 460 μA at single frequency, 50 kHz is applied through human body, and measure the body's resistance and reactance to that current via four-surface electrode. These measurements are combined with the patient data (i.e. age, sex, height and weight) to estimate mass and water compartments. The dengue's clinical studies in correlation with the BIA measurement have been conducted on 119 male and 91 female who are the DHF patients in Universiti Kebangsaan Malaysia, Hospital (HUKM) in Malaysia. The data obtained show that it is possible to predict a patient's condition;recovering or leading to hemorrhagic by monitoring the increasing trend of phase angle and reactance and the decreasing trend for the of ratio of extracellular to intracellular water (ECW/ICW) and ratio of extracellular body mass to body cell mass (ECM/BCM). Experimental findings show that bioelectrical tissue conductivity (BETC), as reflected by reactance is the key determinant indicator for monitoring the hemoglobin status in the DHF patients. Hence, this novel approach of BIA technique can provide rapid, non-invasive, and promising method for monitoring and evaluating the status of the DHF patients. © 2011 IFSA.

关键词： Tissue

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Fuzzy logic based cycle-to-cycle control of FES-induced swinging motion

Fuzzy logic based cycle-to-cycle control of FES-induced swin...

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International Conference on Electrical, control and Computer engineering

作者： Ibrahim, B.S.K.K. Tokhi, M.O. Huq, M.S. Gharooni, S.C. Dept. of Mechatronics and Robotics Faculty of Electrical and Electronic Engineering University Tun Hussein Onn Batu Pahat Johor Malaysia Department of Automatic Control and System Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781612842288

FES induced movement control is a significantly challenging area due to complexity and non-linearity of musculo-skeletal system. The goal of this study is to design a cycle-to-cycle control of FES-induced swinging motion. In this approach only the quadriceps muscle is stimulated by controlling the amount of stimulation pulsewidth. This time dependent behaviour is successfully compensated for using a cycle-to cycle fuzzy controller, which computes the amount of knee extension stimulation on the basis of the achieved flexion angle in previous cycles. The capability of fuzzy control in automatic generation of stimulation burst duration is assessed in computer simulations using a musculo-skeletal model. This paper presents the development of a fuzzy logic control scheme based on discrete-time cycle to cycle control strategies without predefined trajectory. The results show the effectiveness of the approach in controlling FES-induced swinging motion. © 2011 IEEE.

关键词： Genetic algorithms

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Design of PI controller using decoupling and CRA techniques for quadruple-tanks process

Design of PI Controller using decoupling and CRA techniques ...

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International Conference on control, Automation and systems ( ICCAS)

作者： Arjin Numsomran Tianchai Suksri Vittaya Tipsuwanporn Thanit Trisuwannawat Kitti Tirasesth Faculty of Engineering Department of Instrumentation and Control Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand Faculty of Engineering Department of Instrumentation Engineering Pathumwan Institute of Technology Bangkok Thailand

This paper presents the design of PI controller using Decoupling and CRA technique for quadruple-tanks process. In case of, TITO interacting system such as quadruple-tanks process, the controller designs have been performed ambitiously because interferences between inputs and outputs. With the proposed method, The Decoupling controllers have been used for decreasing the cross coupling between inputs and outputs and transforming TITO plant transfer function into SISO form so that SISO controller for each SISO model can be designed easily and efficiently. Furthermore, Using CRA technique has made the output response achieve the required performance specification. Also, in non-minimum-phase, PI controller with inverted Decoupling can stabilize the system and minimize several undesirable influences from an interaction in TITO process. The results from control system design can be illustrated by the experiments.

关键词： Process control Transfer functions Equations Pi control Couplings Damping

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On-line operating adjustment of small biomass fired boilers optimizing CO and NOx emissions

On-line operating adjustment of small biomass fired boilers ...

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作者： Jan, Hrdlicka Sulc, Bohumil Department of Fluid Dynamics and Power Engineering Czech Technical University in Prague Faculty of Mechanical Engineering Technicka 4 CZ-16607 Praha 6 Czech Republic Department of Instrumentation and Control Engineering Czech Technical University in Prague Faculty of Mechanical Engineering Technicka 4 CZ-16607 Praha 6 Czech Republic

ISBN: (纸本)9789604742745

control of combustion conditions in small-scale biomass boilers for heating purposes is a specific task because it must be carried out without any high additional costs. If a basic control of heating water on a desired value is performed by means of a PI control algorithm in a PLC, it is possible to enhance this control unit with other algorithms taking care for searching optimal operating conditions. These conditions are considered from the viewpoint of energy efficiency and ecological impacts, especially emissions of unburned hydrocarbons and CO, but also nitrogen oxides are in interest. This previously minor problem has become significant with the large expansion of the small-size biomass-fired boilers. The combustion process consists of phenomena that we have little information about for an exact mathematical description. The equations of the chemical reactions are known, but in reality the combustion of biomass is much more complicated and more variable than a mathematical model can express. Therefore, techniques searching extreme are more suitable than controllers requiring a mathematical model in design or tuning. In such a way it is possible to design a controller that is able to control the combustion process effectively over the whole operation range.

关键词： Combustion

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Bidirectional best first based autonomous parallel parking system

Bidirectional best first based autonomous parallel parking s...

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International Conference on Electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Amorn Vorashompoo Benjamas Panomruttanarug Kohji Higuchi Faculty of Engineering Department of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Bangkok Thailand Department of Electronic Engineering University of Electro-Communications Tokyo Japan

One of the major difficulties with an autonomous reverse parallel parking is how to find a trajectory of travel from start to goal without any collision. In this paper, a bidirectional search is suggested to find the shortest pathway from an initial vertex to a goal vertex in a directed graph, implying that the initial and goal states must be known in advance. In each step for searching, there are three possible nodes generated from the configuration space (or C-space), that the algorithm must decide to traverse to based on a best first search algorithm. Giving a start and goal points, the designed path is obtained by simulation in MATLAB. The experimental results show an ability to perform a parking maneuver using the simulated path.

关键词： Robots Mobile communication MATLAB Joints

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