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The ITherm Conference series is the leading international venue for scientific and engineering exploration of thermal, thermomechanical, and emerging technology issues associated with electronic devices, packages, and systems.
Energy conversion and conditioning technologies, power electronics, adjustable speed drives and their applications, power electronics for smarter grid, energy efficiency,technologies for sustainable energy systems, converters and power supplies
The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE
The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.
The ACC is the annual conference of the American Automatic Control Council (AACC, the U.S. national member organization of the International Federation for Automatic Control (IFAC)). The ACC is internationally recognized as a premier scientific and engineering conference dedicated to the advancement of control theory and practice. The ACC brings together an international community of researchers and practitioners to discuss the latest findings in automatic control. The 2020 ACC technical program will
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Component parts, hybrid microelectronics, materials, packaging techniques, and manufacturing technology.
The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes
Serves as a compendium for papers on the technological advances in control engineering and as an archival publication which will bridge the gap between theory and practice. Papers will highlight the latest knowledge, exploratory developments, and practical applications in all aspects of the technology needed to implement control systems from analysis and design through simulation and hardware.
2010 International Conference on Measuring Technology and Mechatronics Automation, 2010
According to the reconstruction requirements, dynamic spectrum measurement and analysis system is built to test the vibration of power section's each component. By discussing the results of different combinations of states, the vibration law of various components changing with motor speed is studied. Both The relationship between vibration and transmission path of wind tunnel's power section and the effect of ...
2nd Middle East Conference on Biomedical Engineering, 2014
In this paper, adaptive stead-state models are presented for axial flow-pumps used as heart assist devices. These models predict flow rate and power consumption of the pump based on the pressure differential (head) and impeller speed. The developed models are identified using system identification techniques on data obtained from a mock circulatory loop. The mock circulatory experiments include physiologic conditions ...
2009 Fifth International Conference on Natural Computation, 2009
In this study, a shape optimization of impeller has been performed through a novel genetic algorithm based on optimization technique with pressure rise as objective function while the gas void fraction (GVF) is 30%. The major geometric parameters were selected as the optimizable parameters. Reynolds- averaged Navier - Stokes equations (RANS) with the standard k-epsilon turbulence model were used to ...
Application of the Conversion Research Results for International Cooperation. SIBCONVERS'99. Third International Symposium. Proceedings (Cat. No.99EX246), 1999
IEEE Transactions on Industry Applications, 1992
The authors describe the method of reducing the fan noise, especially the impeller noise, of a household refrigerator. The fan in the refrigerator tested is a propeller fan, and the fan unit consists of an impeller, which has four blades, a rear board, which covers the evaporator, and a front board, which has a number of openings. The flow through ...
According to the reconstruction requirements, dynamic spectrum measurement and analysis system is built to test the vibration of power section's each component. By discussing the results of different combinations of states, the vibration law of various components changing with motor speed is studied. Both The relationship between vibration and transmission path of wind tunnel's power section and the effect of measures such as split support and shock absorption zone on reducing vibration transfer are quantificationally analyzed. Studies show that components processing and installation of low- turbulence wind tunnel's power segment comply with the expected vibration design indicators. High precision characteristic of this set of test system can be used for vibration and noise spectrum measurement and analysis in components and model tests for the same low-speed wind tunnels.
In this paper, adaptive stead-state models are presented for axial flow-pumps used as heart assist devices. These models predict flow rate and power consumption of the pump based on the pressure differential (head) and impeller speed. The developed models are identified using system identification techniques on data obtained from a mock circulatory loop. The mock circulatory experiments include physiologic conditions ranging from a healthy heart function to heart failure. The online adaptive nature of these models is used to estimate effective blood viscosity in real-time. Additional mock circulatory loop experiments are performed to emulate flow obstruction at the pump outlet. Results show that the coefficients from the adapted models can be used to detect, identify and estimate the fault.
In this study, a shape optimization of impeller has been performed through a novel genetic algorithm based on optimization technique with pressure rise as objective function while the gas void fraction (GVF) is 30%. The major geometric parameters were selected as the optimizable parameters. Reynolds- averaged Navier - Stokes equations (RANS) with the standard k-epsilon turbulence model were used to obtain the performance of the impeller as the fitness value at every step of the optimization process. Through this optimal method, a set of better geometric parameters were gotten. Comparing of the inner flow field characters with original impeller, the new optimized one has the higher pressure rise, the more proper distribution of GVF. By this optimization, pressure rise was increased by 14.4% while GVF is 30%. The optimal result indicates that genetic algorithms combined the RANS provide a valuable tool for the optimal design of multiphase pump impeller.
The authors describe the method of reducing the fan noise, especially the impeller noise, of a household refrigerator. The fan in the refrigerator tested is a propeller fan, and the fan unit consists of an impeller, which has four blades, a rear board, which covers the evaporator, and a front board, which has a number of openings. The flow through the openings freezes food in the freezer. By measuring the internal flow with a laser Doppler velocimeter, it was made clear that the flow through the impeller was not symmetrical to the axis. The unsymmetrical flow seems to be caused by the restrictions of flow passages, and it might produce the impeller noise. The search for the sound source by the sound intensity method indicated that the noise was radiated through the openings of the front board. Guiders were installed on the rear board in the fan unit to guide the flow away from the openings. As a result, the impeller noise was reduced, whereas the flow was kept almost the same.<<ETX>>
This paper presents a new scheme, which applies wind energy and hydropower to buildings to construct a kind of new low-carbon and energy-saving toilets. Natural wind can be utilized to emit the exhaust in toilets of buildings, while sewage can be used to generate electricity for sound-control lights in corridors. In this way, electric energy can be saved effectively and a new low-carbon, energy-saving and environmental-friendly mode of live can be popularized.
In this study, a liquid flow in two-, three- and four-stage centrifugal pumps was numerical investigated. The continuity and Navier-Stokes equations with the k-ε turbulence model and standard wall functions were used by means of the ANSYS-CFX code. To enhance the design of the multistage pump, the impacts of the number of impeller blades, diffuser return vanes and the number of stages on the performances of a multistage centrifugal pump were analyzed. The results obtained demonstrate that the selected parameters affect the pump head, brake horsepower and efficiency in a strong yet different manner. To validate the model developed, the results of the numerical simulations were compared with the experimental results from the pump manufacturer.
In this paper the proposed method aims to develop a low cost and efficient wall climbing robot that can climb on almost all surfaces. To ensure mechanical stability a centrifugal impeller is used and positioned above the robot that helps to generate an isolated low pressure area that makes adhesion to the vertical wall possible. When the impeller works, the sealing used in our robot reshapes to the shape of the contacting surface, maintaining the low pressure area inside which is a main advantage that eliminates the need for a perfect sealing as required by other vacuum powered wall climbing robots. To control the robot we use an ATmega8 micro controller along with RF wireless transceiver module and some discrete components. The experiment results verified the feasibility of the robot and it can make wall to floor and floor to wall transitions.
To systematically study the spatial flow characteristics inside an axial flow pump, based on three-dimensional Navier- Stokes governing equation and renormalization group(RNG) k-epsiv model, computational fluid dynamics (CFD) work on rotating turbulent flows with complicated curved boundaries was practiced. Unstructured meshes and the semi-implicit method for pressure linked equation (SIMPLE) algorithm were adopted. Major attentions were placed on pressure distribution in inlet, impeller and vane zones under design operation condition. Three viewpoints are obtained. (1) From blade inlet to outlet, hydrostatic pressure decreases firstly and then increases on suction surface. On pressure surface, hydrostatic pressure increases radially from hub to tip. The total pressure on suction surface is obviously lower than that on pressure surface. (2) The lowest pressure appears near the leading edge of suction surface, approaching the blade tip, where cavitation occurs with great possibility.(3) From inlet to outlet of vane passage, there is no pressure lower than critical cavitation pressure and hydrostatic pressure increase along the bulk flow direction. Numerical simulation result here can be referred in axial flow impeller design and relevant flow analysis.
A balance beam with magnetic bearings is modeled. A robust sliding mode controller for magnetic actuators is presented. The hardware of the real time control system is described. The proposed control scheme is implemented using a Pentium II 450 MHz computer with real time Linux for a balance beam. Its effectiveness is verified through the comparative experiment results.
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