6篇
您的检索式：作者名="SIVASHANMUGAM P."
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| 1 | A Fuzzy Logic Based Supervisory Hierarchical Control Scheme for Real Time Pressure Control显示文摘This paper describes a supervisory hierarchical fuzzy controller (SHFC) for regulating pressure in a real-time pilot pressure control system. The input scaling factor tuning of a direct expert controller is made using the error and process input parameters in a closed loop system in order to obtain better controller performance for set-point change and load disturbances. This on-line tuning method reduces operator involvement and enhances the controller performance to a wide operating range. The hierarchical control scheme consists of an intelligent upper level supervisory fuzzy controller and a lower level direct fuzzy controller. The upper level controller provides a mechanism to the main goal of the system and the lower level controller delivers the solutions to a particular situation. The control algorithm for the proposed scheme has been developed and tested using an ARM7 microcontroller-based embedded target board for a nonlinear pressure process having dead time. To demonstrate the effectiveness, the results of the proposed hierarchical controller, fuzzy controller and conventional proportional-integral (PI) controller are analyzed. The results prove that the SHFC performance is better in terms of stability and robustness than the conventional control methods. | N. Kanagaraj P. Sivashanmugam S. Paramasivam | 2009 | International Journal of Automation and computing2009，6，1： | 6 |
| 2 | HEAT TRANSFER OF TiO_2/WATER NANOFLUID IN A COILED AGITA-TED VESSEL WITH PROPELLER显示文摘An attempt is made to investigate heat transfer enhancement using nanofluid in a coiled agitated vessel fitted with propeller agitator.The heat transfer coefficient in coiled agitated vessel for water and TiO2/water nanofluid of 3 different volume concentrations(0.10%,0.20% and 0.30%) are estimated and compared.The heat transfer coefficient for nanofluid is found to be higher than that for water and also found to increase with increasing volume concentrations.The enhancement in the convective heat transfer using nanofluid is found to be a maximum of 17.59%.Empirical correlations are separately formed for water and TiO2/water nanofluid as well as found to fit the experimental data within ±5% for water and within ±10% for nanofluid. | PERARASU V.T. ARIVAZHAGAN M. SIVASHANMUGAM P. | 2012 | Journal of Hydrodynamics2012，24，6： | 2 |
| 3 | Influence of stack geometry and resonator length on the performance of thermoacoustic engine显示文摘 | N.M. Hariharan P. Sivashanmugam S. Kasthurirengan | 2012 | Applied Acoustics2012，，10： | 2 |
| 4 | Experimental studies on heat transfer and friction factor characteristics of laminar flow through a circular tube fitted with helical screw-tape inserts显示文摘 | P. Sivashanmugam S. Suresh | 2006 | Applied Thermal Engineering2006，，16： | 1 |
| 5 | Effect of resonator length and working fluid on the performance of twin thermoacoustic heat engine – Experimental and simulation studies显示文摘 | N.M. Hariharan P. Sivashanmugam S. Kasthurirengan | 2013 | Computers and Fluids2013，，： | 1 |
| 6 | Optimization of thermoacoustic refrigerator using response surface methodology显示文摘Thermoacoustic refrigerator (TAR) converts acoustic waves into heat without any moving parts. The study presented here aims to optimize the parameters like frequency, stack position, stack length, and plate spacing involving in designing TAR using the Response Surface Methodology (RSM). A mathematical model is developed using the RSM based on the results obtained from DeltaEC software. For desired temperature difference of 40 K, optimized parameters suggested by the RSM are the frequency 254 Hz, stack position 0.108 m, stack length 0.08 m, and plate spacing 0.0005 m. The experiments were conducted with optimized parameters and simulations were performed using the Design Environment for Low-amplitude ThermoAcoustic Energy Conversion (DeltaEC) which showed similar results. | HARIHARAN N. M. SIVASHANMUGAM P. KASTHURIRENGAN S. | 2013 | Journal of Hydrodynamics2013，25，1： | 0 |
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