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International Conference on Circuits, Communication, control and Computing

作者： K V Santhosh Dept. of Instrumentation & Control Engineering Manipal Institute of Technology Manipal India

Design of an adaptive controller for controlling liquid level in a tank is proposed in this paper. The objective of the proposed paper is to design a PID controller to control the level of liquid. A multi-sensor data fusion architecture based controller is proposed which tunes value of proportional gain constant (KP), integral constant (KI), and differential constant (KD) to maintain a constant liquid level even with changes in liquid temperature. Reaction of temperature with liquid level relation is obtained using measured temperature from temperature sensor. Level process is modeled using two point model technique and model equation for variation in liquid temperature is identified to obtain the new PID values using Ziegler Nicholas tuning technique. The obtained controller is subjected to test with variations in liquid level and temperature, results shows stabilization of process variable.

关键词： Liquids Temperature measurement Temperature sensors Temperature control Process control Level control Data integration

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Upper bound for average outage probability of BT-ADF relay networks over Quasi-static rayleigh fading channels

International Journal of Control and Automation

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International Journal of control and Automation 2014年第10期7卷 99-108页

作者： Woo, Choongchae Ko, Kyunbyoung Department of Electronics Engineering Hanseo University 360 Daegok-ri Haemi-myun Seosan-si Chungnam Korea Republic of Dept. of Control and Instrumentation Engineering 50 Daehak-ro Chungju-si Chungbuk Korea Republic of Department of IT Convergence Korea National University of Transportation 50 Daehak-ro Chungju-si Chungbuk Korea Republic of

In this paper, we propose the analytical approach for burst transmission (BT) adaptive decode-and-forward (ADF) relaying schemes consisting of burst transmission over quasi-static Rayleigh fading channels. At first, we focus on the error-event at relay nodes for symbol burst transmission, whereas previous researches considered one data symbol transmission so that they showed the best performance bounds. By considering symbol burst for ADF relay systems, we derive an exact outage probability expression which can be the performance of practical systems. Furthermore, the average outage probability is derived in approximated closed-form upper bound for an arbitrary link SNR. The derived analytical approach is verified based on the number of relays and burst symbols. Its accuracy is confirmed by comparison with simulation results.

关键词： Signal to noise ratio

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Modification of Cascaded H-bridge Multilevel Inverter to increase output voltage level with a single DC voltage Source

Modification of Cascaded H-bridge Multilevel Inverter to inc...

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IEEE Energy Conversion Congress and Exposition

作者： Jin-sung Choi Feel-soon Kang Dept. of Control and Instrumentation Engineering Hanbat National University Daejeon Korea Dept. of Electronics and Control Engineering Hanbat National University Daejeon Korea

ISBN: (纸本)9781479957774

It presents an effective circuit configuration of multilevel inverter which can increase the number of output voltage levels compared with the conventional cascaded H-bridge multilevel inverter. The proposed multilevel inverter consists of a dc input source with a series of capacitors, diodes, active switches for synthesizing output voltage levels, and an H-bridge cell. To generate seven levels in an output voltage, the proposed approach needs 7 switches. On the other hand, a traditional cascaded H-bridge multilevel inverter needs 12 switches. It can save five active switches resulted in cost saving with increasing the output voltage levels. Moreover, it is useful to extend output voltage levels by adding more active switches or the proposed module itself. To verify the validity of the proposed approach, we carry out computer-aided simulations and experiments. Here we also introduce a switching scheme to solve voltage unbalancing problem occurred in dc input voltage source with series-connected capacitors.

关键词： voltage level output voltage H-bridge circuit configuration Inventors Switches multilayers

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Clock-Less Positioning of Sampling Pulse for Extraction of Critical Information Adding Advantage on Fixed Rate and Level Based Sampling

Clock-Less Positioning of Sampling Pulse for Extraction of C...

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International Conference on Advances in Computing and Communications (ICACC)

作者： Abhinav Srivastava Kannan Srinivasan Dept. of Instrumentation and Control Engineering National Institute of Technology Tiruchirappalli Tiruchirappalli India

This paper is to discuss optimal positioning of sampling pulse for extraction of vital information from signal at critical points using clock-less sampling by online analysis of signal. Using this concept sampling pulses are generated which are less than or equal to minimum Nyquist rate for capturing only critical points without any prior knowledge of signal. This method of sampling technique is applicable for all available signals including signals which are not truly band limited and having sharp frequencies changes. Robust analysis of fixed rate sampling and level based sampling is done by clubbing them with proposed concept in simulation environment.

关键词： Transient analysis Clocks Robustness Signal resolution Data mining control engineering Uncertainty

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Model predictive control of stator currents in Switched Reluctance Generators

Model predictive control of stator currents in Switched Relu...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Morgan Kiani Dept. of Robot and Control Engineering Chungbuk National University Cheongju South Korea

control of phase current is an integral part of operation in Switched Reluctance Generators (SRG). Since machine windings experience a substantial back-emf during generation, stator phase currents tend to increase even after the phase is turned off. This in turn necessitates an oversized converter, thereby increasing the cost and overall size of the system. Moreover, due to variations in speed of the prime mover, the power electronic converter should be designed for the worst possible case. This will magnify the additional cost and size issues. Furthermore, implementation of a current profiling scheme for specific reasons such as active vibration cancellation, etc. requires an online estimation of the motional back-emf. In the present paper, a novel method for controlling the current in SRG is proposed. This method enhances the cost and size of the power electronics converter. In addition, using an online estimation of motional back-emf, it makes current profiling in the stator windings possible. This will pave the way for advanced applications of SRG in automotive, aerospace and other challenging places. It must be noted that this method does not require any extra circuitry or memory for its implementation.

关键词： Inductance Rotors Reluctance machines Stator windings Estimation Saturation magnetization

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Elimination of slave controller in cascade level-flow process control system using back propagation neural network

Elimination of slave controller in cascade level-flow proces...

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International Conference on Green Computing Communication and Electrical engineering (ICGCCEE)

作者： B. Kalaiselvi K. Hamanth Kumar R. Karthekeyan Department of Instrumentation and control Bharath University Chennai Tamilnadu India Dept. of Instrumentation and control Sri Sairam Engineering College Chennai Tamilnadu India

This paper presents a new design perception for slave controller in Cascade process control System. It ensures enhanced robustness by minimizing the physical presence of slave controller in the cascaded loops. The desired outputs are trained by ANN using BPN. A Level and flow measurement system is taken as an experimental set up. The level controller is the master controller and the flow is the slave controller in a conventional PID controller. Using ANN, we minimize the presence of the flow controller. ANN with three inputs and one output with single hidden layer with five hidden neurons are used as a slave controller. The training set attained from the knowledge of the conventional PID controller is used to train the network. The performance of the process is evaluated MSE criterion. The output response of the cascade process control system using suggested control methods is compared with the traditional PID controller. Error versus epoch analysis gives us a clear picture of convergence of output nearer to the real time values attained from the conventional PID controller. The control results clearly state that this soft slave controller shows better performance than the physical slave controller.

关键词： Artificial neural networks Training Biological neural networks Process control Neurons Feeds Computational modeling

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Pulsed eddy current technique for testing of stainless steel plates

Studies in Applied Electromagnetics and Mechanics

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Studies in Applied Electromagnetics and Mechanics 2014年 39卷 36-43页

作者： Rao, K. Sambasiva Jayakumar, T. Sekhar, A. Chandra Rao, B. Purnachandra Metallurgy and Materials Group Indira Gandhi Centre for Atomic Research Kalpakkam TN-603102 India Dept of Control Instrumentation and Robot Engineering Chosun University Korea Republic of

ISBN: (纸本)9781614994060

Pulsed eddy current (PEC) technique is attractive for detection of surface defects and wall-thinning in covered electrically conductive materials. This paper discusses development of PEC technique and two different types of self-nulling probes (differential Hall sensors and Double-D differential coils) for detection of surface notches in a thick stainless steel plate. PEC testing of covered objects is attempted. In this regard, the influence of lift-off on the PEC signal due to insulation shims and thin aluminum layer is studied using the peak amplitude and the performance of the two probes is compared. The results showed that the PEC instrument, probes and scanner developed can be used for detection as well as imaging of defects in stainless steel plates covered with insulation. © 2014 The authors and IOS Press.

关键词： Probes

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An image processing technique for color detection and distinguish patterns with similar color: An aid for color blind people

An image processing technique for color detection and distin...

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International Conference on Circuits, Communication, control and Computing

作者： Bhagya R Navada K V Santhosh S Prajwal Harikishan B Shetty Dept. of Instrumentation and Control Engineering Manipal Institute of Technology Manipal India Manipal Institute of Technology Manipal Karnataka IN

In this work an attempt is made for designing a prototype in aid for color blind people in detecting color and edges of a given image which are of similar colors. Color blind people are restricted and even excluded from some professional jobs because of their deficiency to distinguish between colors. Motivation behind this work is to try and reduce such deficiency using technology. Image processing technique is used in proposed work to develop a setup for identifying the colors in an image and indicating the edges in case of different images with similar colors. Image processing involve two parts, first is color detection and the second is edge detection which is carried out on a LabVIEW platform. Images are obtained using a wireless camera in the field of view of a color blind person who is unable to identify or judge the colors. It is then processed using LabVIEW, color and edge of the image is displayed on LabVIEW front panel.

关键词： Image color analysis Image edge detection Cameras TV Tuners Wireless communication Communication system security

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A landmark based localization system using a kinect sensor

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Transactions of the Korean Institute of Electrical Engineers 2014年第1期63卷 99-107页

作者： Park, Kwiwoo Chae, JeongGeun Moon, Sang-Ho Park, Chansik Dept. of Control and Robot Engineering Chungbuk National University Korea Republic of Division of Computer Technology Yeungnam College of Scienceand Technology Korea Republic of

In this paper, a landmark based localization system using a Kinect sensor is proposed and evaluated with the implemented system for precise and autonomous navigation of low cost robots. The proposed localization method finds the positions of landmark on the image plane and the dept. value using color and dept. images. The coordinates transforms are defined using the dept. value. Using coordinate transformation, the position in the image plane is transformed to the position in the body frame. The ranges between the landmarks and the Kinect sensor are the norm of the landmark positions in body frame. The Kinect sensor position is computed using the tri-lateral whose inputs are the ranges and the known landmark positions. In addition, a new matching method using the pin hole model is proposed to reduce the mismatch between dept. and color images. Furthermore, a height error compensation method using the relationship between the body frame and real world coordinates is proposed to reduce the effect of wrong leveling. The error analysis are also given to find out the effect of focal length, principal point and dept. value to the range. The experiments using 2D bar code with the implemented system show that the position with less than 3cm error is obtained in enclosed space(3,500mm *3,000mm*2,500m).

关键词： Error compensation

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The use of genetic algorithms for speed and current controller designs for IPMSM drive

The use of genetic algorithms for speed and current controll...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Pakorn Chottiyanont Mongkol Konghirun Wanchak Lenwari Dept. of Electrical Engineering King Mongkut's University of Technology Thonburi Thailand Dept. of Control System and Instrumentation Engineering King Mongkut's University of Technology Thonburi Thailand

ISBN: (纸本)9781479951635

Recently, speed and current controller have been developed for interior permanent magnet synchronous motor (IPMSM). Each method has its own advantage and limitation. However, in the commercial drive system, the controller should be easy to set up and tune in particular for operator, therefore the classical proportional plus integral (PI) controller has widely used due to its simple structure while achieving zero steady-state error. However finding out the parameters of the controller is not any easy task because of complex dynamics of IPMSM. For this reason, this paper presents a novel automated design employed genetic algorithm (GA) to optimize PI speed and current controller of IPMSM. The drive control system is designed on the basis of vector control scheme incorporated with the maximum torque per ampere (MTPA) control strategy to improve the drive performance. Simulation and experimental results verify the effectiveness of the proposed method.

关键词： Torque Optimization Genetic algorithms Stators Mathematical model Simulation Sociology

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