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Inhomogeneous mass flow rate measurement of solid particles using a single electrostatic sensor

Inhomogeneous mass flow rate measurement of solid particles ...

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International Conference on Electrical, control and Computer engineering (INECCE)

作者： Mohd Fua'ad bin Rahmat Teimour Tajdari Department of Control and Instrumentation Engineering Faculty of Electrical Engineering UTM Skudai Johor Malaysia Department of Control and Instrumentation Engineering Faculty of Electrical Engineering UTM Skudai Johor Malaysia

The development of reliable, cost effective and high accuracy instrument to mass flow rate measurement is becoming increasingly important in many industries. Appropriate measurement method and design leads to improvement of pneumatic conveyors operation and process efficiency. This paper present an instrument design based on passive charge detection using a single electrostatic sensor. A time domain signal processing algorithm is developed to measurement of mass flow rate from acquired electrical charge signal. The findings is led to a low cost and high accuracy design, the experimental test results of the design shows less than ±5% error between measured mass flow rate and reference reading acquired from the manual weighing.

关键词： Electrostatics Electrostatic measurements Atmospheric measurements Particle measurements Electrodes Solids Shape

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Electronic design for portable electrical capacitance sensor: A multiphase flow measurement

Electronic design for portable electrical capacitance sensor...

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IEEE International Conference on Mechatronics

作者： Mohamad, E. Johana Marwah, O. M. Faizan Rahim, Ruzairi Abdul Rahiman, Mohd Hafiz Fazalul Muji, Siti Zarina Mohd Dept of Mechatronic and Robotics Engineering Faculty of Electrical and Electronic Engineering Malaysia Dept of Manufacturing and Industrial Engineering Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussien Onn Malaysia Pt. Raja Bt. Pahat Johor Malaysia Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Malaysia

ISBN: (纸本)9781612844350

The earlier research shows that the electrical capacitance sensor through the tomography technique is applicable in flow visualization or image reconstruction, named as Electrical Capacitance Tomography (ECT). ECT can be used for imaging industrial multi-component processes involving nonconducting fluids and solids in pipelines. The electrical capacitance sensor is a non-invasive device that uses non-intrusive technique to measure the concentration of flow inside a closed pipe by measuring variations in the dielectric permittivity of the material. The capacitance of the sensor changes when the mean dielectric constant between the electrodes varies due to variations in the percentage of gas and liquid flowing in the pipe. The acquired concentration profile that obtains from capacitance measurements is able to imaging liquid and gas mixture in pipelines, meanwhile the system development is designed to attach on a vessel. The electrode plates which act as the sensor previously has been assemble fixed on the pipeline, thus it causes difficulty for the production to have any new process installation in the future. Therefore on-board sensing plate offers a new design and idea on ECT system which is portable to be assembled in different diameter sizes of pipeline, and it's flexible to apply in any number due to different size of pipeline without redesign the sensing module. The on-board sensing plate development contains signal conditioning circuit and sensing electrode built in a single module (embedded on single plate). In this paper, the details on fabricating the sensors electrodes, had been described, including signal conditioning circuit/electronic part of measurement, such as stray immune capacitance measurement circuit, amplifying circuit, AC to DC converter circuit and filter circuit. © 2011 IEEE.

关键词： Electrodes

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Experimental research of high-speed electrical motor supercharger dynamic properties

Experimental research of high-speed electrical motor superch...

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Symposium Series on Computational Intelligence, IEEE SSCI 2011 - 2011 IEEE Workshop on Merging Fields of Computational Intelligence and Sensor Technology, CompSens 2011

作者： Novák, Martin Novák, Jaroslav Čeřovský, Zdeněk Faculty of Mechanical Engineering Department of Instrumentation and Control Engineering Czech Technical University in Prague Prague Czech Republic Faculty of Electrical Engineering Department of Electrical Drives and Traction Czech Technical University in Prague Prague Czech Republic Czech Technical University in Prague Prague Czech Republic

ISBN: (纸本)9781424499120

This paper presents some specific issues of a high speed permanent magnet synchronous motor control used in a combustion engine supercharger system. A description of a method designed to limit the load angle of synchronous motor in high speed is given. Also experimental results in dynamic states are shown. In these states mainly acceleration times and energy intensity with correlation on motor current and field weakening were examined. Dynamic properties were tested for a power supply with both high and low internal resistance. The experimental setup description is given and test results for speed up to 42 000 RPM are shown. © 2011 IEEE.

关键词： Synchronous motors

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The effect of air gap, wheel speed and drive angle on the anti-lock braking system efficiency

The effect of air gap, wheel speed and drive angle on the an...

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International Carpathian control Conference

作者： Binh, Le Khac Koci, Petr Department of Control Systems and Instrumentation Faculty of Mechanical Engineering VSB - Technical University of Ostrava 17. listopadu 708 33 Ostrava - Poruba Czech Republic

ISBN: (纸本)9781612843599

Anti-lock Braking systems (ABS) is a safe system and equipped in almost modern cars. In ABS, wheel speed sensors (WSS) are important components, they provide essential wheel speed information not only for anti-lock brake systems, but also for traction control and stability control systems. The wheel speed sensors on most vehicles are magnetic and generate an alternating current (AC) signal that increases in frequency and amplitude with wheel speed. When the teeth on the tone ring rotate past the sensor tip, it changes the magnetic field and induces a current in the sensor windings. The result is a classic sine wave current pattern that changes with wheel speed. The strength of the signal can be affected by not only wheel speed but also the air gap between the sensor and tone ring, resistance inside the sensor, resistance in the external wiring and connector. A precise gap is necessary to produce a strong, reliable signal. But if the gap is too close, metal-to-metal contact between the sensor and tone ring would damage both. Conversely, an air gap that's too wide may produce a weak or erratic signal or no signal at all. The paper presents the change of alternating current signal when changing sensor air gap, wheel speed and drive angle. By using PULSE LabShop and SignalAnalyser software, sensor KMI15, we observe the waveform on the scope. A scope will show the voltage and frequency of the signal, as well as any missing or distorted humps in the sine wave pattern. From this, we can determine the ABS brake efficiency. © 2011 IEEE.

关键词： Efficiency

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Frequency domain system identification for servo system in HGA testing system using Particle Swarm Optimization

Frequency domain system identification for servo system in H...

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Annual Conference of Industrial Electronics Society

作者： Tanachai Jatturongkapolkul Benjamas Panomruttanarug Faculty of Engineering Department of Control System and Instrumentation King Mongkuts University of Technology Thonburi Bangkok Thailand

In the disk drive industry, head gimbal assemblies (HGAs) may be individually tested prior installation in a disk drive. While performing a test, a false negative result may be created because of external air turbulence caused by the rotation of the test disk. The objective of this paper is to find a model of the servo system in HGA testing system so that we know how to adjust the command to get rid of the effect of disturbance. The technique so called Transfer Function Determination Code (TFDC) is proposed to model the system in the frequency domain. In addition, Particle Swarm Optimization (PSO) is used to adjust the weights in TFDC algorithm in each frequency. The simulation results show a comparison of different inertia weight adjustments for the models.

关键词： Mathematical model Servomotors Particle swarm optimization Frequency domain analysis Transfer functions Equations Assembly

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Chaotic trajectory tracking of an electro-hydraulic actuator system using discrete sliding mode control

Chaotic trajectory tracking of an electro-hydraulic actuator...

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2011 IEEE International Conference on control system, Computing and engineering, ICCSCE 2011

作者： Ghazali, R. Ngadengon, R. Sam, Y.M. Rahmat, M.F. Hamzah, N. Zulfatman Department of Mechatronic and Robotic Engineering Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia 86400 Batu Pahat Johor Malaysia Department of Control and Instrumentation Engineering Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia Faculty of Electrical Engineering Universiti Teknologi MARA Malaysia 13500 Permatang Pauh P. Pinang Malaysia

ISBN: (纸本)9781457716423

Electro-hydraulic actuator (EHA) system inherently suffers from uncertainties, nonlinearities and time-varying in its model parameters which makes the modeling and controller designs are more complicated. The main objective of this paper is to perform a robust control design using discrete-time sliding mode control (DSMC) with perfect tracking control strategy. The proposed controller consists of feedback and feedforward combination which capable to reduce phase lag during the trajectory tracking of EHA system. Chaotic trajectory tracking is performed in the experimental works to show the robustness of DSMC controller and performance comparison is made with Linear-Quadratic-Regulator (LQR) and Proportional-Integral-Derivative (PID) controllers. The findings show that the proposed controller outperforms the LQR and PID controllers in terms of tracking accuracy. © 2011 IEEE.

关键词： controllers

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Vessel segmentation in retinal images using graph-theoretical vessel tracking

Vessel segmentation in retinal images using graph-theoretica...

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12th IAPR Conference on Machine Vision Applications, MVA 2011

作者： Rattathanapad, Suthit Uyyanonvara, Bunyarit Mittrapiyanuruk, Pradit Kaewtrakulpong, Pakorn Department of ICT Sirindhorn International Institute of Technology Thammasat University Thailand Department of Mathematics SrinakharinWirot University Thailand Department of Instrumentation and Control System Engineering King Mongkut's University of Technology Thonburi Thailand

ISBN: (纸本)9784901122115

This paper presents a method for automatic segmentation of blood vessels in retinal images. The method is based on vessel tracking technique. The key idea of the method is that first a set of seed points (center of vessel cross sections) is extracted. Then, the seed points are connected to establish the vessel skeleton. Finally, the false vessel point are rejected by resorting to a hypothesis-verificaton based procedure. The major contribution of this work is that we formulate the step of seed point connection in the form of graph-theoretical shortest path problem. Then we apply the Dijkstra's algorithm to solve the problem. The performance of our method evaluated on the publicly available DRIVE database shows promising results.

关键词： Blood vessels

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The design of PID controller for track following control of hard disk drive using coefficient diagram method

The design of PID controller for track following control of ...

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50th Annual Conference on Society of Instrument and control Engineers, SICE 2011

作者： Chaoraingern, Jutarut Vaidee, Worapon Trisuwannawat, Thanit Tipsuwanporn, Vittaya Numsomran, Arjin Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand College of Data Storage Innovation King Mongkut's Institute of Technology Ladkrabang Bangkok Thailand

ISBN: (纸本)9784907764395

This paper presents the design of PID controller for track following control of hard disk drive using Coefficient Diagram Method (CDM). For this reason, Track following control of hard disk drive process has many disturbances from internal and external sources, so determining satisfactory controller parameters to stabilize control system and satisfy response specification is difficult. The proposed PID controller design using Coefficient Diagram Method (CDM) based on proper choosing the coefficients of the characteristic transfer function of the closed loop control system in accordance with stability index and equivalent time constant is an uncomplicated and convenience technique for applying to Track following control in hard disk drive process. Matlab simulation results shown that PID controller using CDM technique is fairly stable and robust whilst give the convenience in controller's parameters adjustment. © 2011 SICE.

关键词： Closed loop control systems

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Prototypical robotic fish with swimming locomotive configuration in fluid environment

Prototypical robotic fish with swimming locomotive configura...

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作者： Nilas, P. Suwanchit, N. Lumpuprakarn, R. Department of Instrumentation and Control Engineering Faculty of Engineering King Mongkut's Institute of Technology Ladkrabang Bangkok 10520 Thailand Srinakarinwirot University Sukhumvit Rd. Bangkok 10240 Thailand

ISBN: (纸本)9789881925121

Aquatic animal has always inspired many researchers' interest to develop such living creations' behavioral robots. Numbers of animal-liked aquatic robots have been invented in the past;however, very few works involved the study of full behavioral movement of these aquatic animals. This paper presents a study and design of a robotic fish that imitate natural aquatic animals' forms of locomotion by focusing on the apparatus of swimming performances. The main research focus is the behavioral movement of the propulsion and maneuvering of a robotic fish in a fluid environment. The robot could dynamically generate a series of behavior selection network to form the operational plan, avoiding obstacle as well as fish-liked maneuver;forward, backward and turning. This robot differs from other research that not only uses the tail peduncle to propel its movement but also use pectoral fin in stabilizing and maneuvering. The proposed paradigm has been implemented to develop a prototypical robotic fish. The experiments also illustrate the conventionality, and the robustness of such a fish-robot framework.

关键词： Intelligent robots

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Natural trajectory based FES-induced swinging motion control

Natural trajectory based FES-induced swinging motion control

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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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