http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Medium Voltage Asynchronous Micro-grid Power Conditioning System enabled by HV SiC Devices
Sanket Parashar,Subhashish Bhattacharya 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This research paper addresses a Medium-Voltage Asynchronous Micro-grid Power Conditioning system enabled by HV SiC devices to Asynchronously flow power from microgrids to the larger grid. The Asynchronous Microgrid Power Conditioning System is a modular MVAC (13.8kV AC) to MVAC (4,160 V AC and 13.8 kV AC) power conditioning systems blocks (PCSB) that can be used for grid interconnection of Megawatt-scale flow control microgrids (Asynchronous MVAC Microgrids), bidirectional power flow capablity and scalablity so that they can be used for a broad range of flow control microgrids of different scale (100 kW to multi MW) including microgrids which have net generation or net load flow at point of connection of larger grids. This modular approach is intended to result in highervolume, lower-cost power electronics building blocks that service many applications at standard voltages: 4,160 V AC and 13.8 kV AC. This Microgrid PCS solution should enable multi-port integration of renewable energy sources to the main grid. The Microgrid PCS solution can be implemented with 3.3 kV to 10 kV SiC MOSFET modules. The modular converters will utilize highvoltage, high frequency (10 kHz) power electronics to reduce cost, size , footprint, volume and weight and to provide the bandwidth (voltage control BW = 300 Hz and current control BW = 1 kHz) needed for both the grid-facing and microgrid facing functions required by interconnection standards plus functions required for a wide range of generator, storage and load applications.
Modeling and Sliding Mode Control of Flexible Structure
Sanket Kailas Gorade,Shailaja R. Kurode,Prasanna S. Gandhi 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
Modeling of flexible structure and its control using sliding modes is investigated in this paper. A system of Flexible Inverted Pendulum(FIP) with bobmass on its tip, cantilevered vertically on a cart, is taken as a representative case of flexible structures. Mechanical modeling of this system is proposed using a new approach. The pendulum is assumed to be made up of chain of multiple small sub-links. Torsional springs of different stiffnesses are then assumed at each joint (between successive links) in its structure. The flexibility of pendulum is accounted by specifying definite stiffness value to each torsional spring, in decreasing order from bottom to top. Complete mathematical model is derived considering multibody mechanical system using energy approach. The proposed model is validated with experimental data obtained from actual plant behavior. Sliding Mode Control (SMC) is then developed for this system. A stable sliding surface is designed. Controller is then synthesized using Gao’s power rate reaching law. Performance of this controller is tested in simulation. Robustness of this sliding mode controlled system, against disturbances, is confirmed from simulation results.
Effect of surface anodization on stability of orthodontic microimplant
Sanket Karmarker,Wonjae Yu,Hee-Moon Kyung 대한치과교정학회 2012 대한치과교정학회지 Vol.42 No.1
Objective: To determine the effect of surface anodization on the interfacial strength between an orthodontic microimplant (MI) and the rabbit tibial bone, particularly in the initial phase after placement. Methods: A total of 36 MIs were driven into the tibias of 3 mature rabbits by using the self-drilling method and then removed after 6 weeks. Half the MIs were as-machined (n = 18; machined group), while the remaining had anodized surfaces (n = 18; anodized group). The peak insertion torque (PIT) and the peak removal torque (PRT) values were measured for the 2 groups of MIs. These values were then used to calculate the interfacial shear strength between the MI and cortical bone. Results: There were no statistical differences in terms of PIT between the 2 groups. However, mean PRT was significantly greater for the anodized implants (3.79 ± 1.39 Ncm) than for the machined ones (2.05 ± 1.07 Ncm) (p < 0.01). The interfacial strengths, converted from PRT, were calculated at 10.6 MPa and 5.74 MPa for the anodized and machined group implants, respectively. Conclusions: Anodization of orthodontic MIs may enhance their early-phase retention capability, thereby ensuring a more reliable source of absolute anchorage.
Message Aggregation in VANETs for Delay Sensitive Applications
Sanket Desai,Rabee Elhdad,Naveen Chilamkurti 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.10
A Vehicular Ad-Hoc Network (VANET) is categorized as a Mobile Ad-Hoc Network (MANET) which delivers wireless network servies with an aim to improve road safety and enhance driving comfort. Diverse applications of Vehicular Ad-Hoc Networks such as infotainment, road safety and public safety have made VANETs as a notable and emerging area of research and development. As of now, numerous vehicular ad-hoc network research projects have been mainly aimed at data security and routing. This has raised a critical problem of data congestion and loss of data accuracy in VANETs. A major challenge in VANETs is to provide efficient data communication and propogation for precise and valuable information. This paper presents a generalized framework for message aggregation. Message Aggregation can be used to transmit minimal data and to enhance the communication efficiency thus reducing the communication overhead in VANETs. This will help in reducing the redundancy in VANETs resulting in dissemination of precise information
Dessai, Sanket,Naaz, Zakiyaunnissa Alias Naziya Journal of International Conference on Electrical 2014 Journal of international Conference on Electrical Vol.3 No.4
Rotating machines are an integral part of large electrical power machinery in most of the industries. Any degradation or outages in the rotating electric machinery can result in significant losses in productivity. It is critical to monitor the equipment for any degradation's so that it can serve as an early warning for adequate maintenance activities and repair. Prior research and field studies have indicated that the rotating machines have a particular type of signal structure during the initial start-up transient. A machine performance can be studied based on the effect of degradation in signal parameters. In this paper a data-acquisition system and the FFT algorithm has been design and model using the MATLAB and Simulink. The implementation had been carried out on the TMS320 DSP Processor and various testing and verification of the machine performance had been carried out. The results show good agreement with expected results for both simulated and real-time data. The real-time data from AC water pumps which have rotating motors built-in were collected and analysed. The FFT algorithm provides frequency response and based on this frequency response performance of the machine had been measured.The FFT algorithm provides only approximation about the machine performances.
Effect of surface anodization on stability of orthodontic microimplant
Karmarker, Sanket,Yu, Won-Jae,Kyung, Hee-Moon The Korean Association Of Orthodontists 2012 대한치과교정학회지 Vol.42 No.1
Objective: To determine the effect of surface anodization on the interfacial strength between an orthodontic microimplant (MI) and the rabbit tibial bone, particularly in the initial phase aft er placement. Methods: A total of 36 MIs were driven into the tibias of 3 mature rabbits by using the self-drilling method and then removed aft er 6 weeks. Half the MIs were as-machined (n = 18; machined group), while the remaining had anodized surfaces (n = 18; anodized group). The peak insertion torque (PIT) and the peak removal torque (PRT) values were measured for the 2 groups of MIs. These values were then used to calculate the interfacial shear strength between the MI and cortical bone. Results: There were no statistical differences in terms of PIT between the 2 groups. However, mean PRT was significantly greater for the anodized implants ($3.79{\pm}1.39$ Ncm) than for the machined ones ($2.05{\pm}1.07$ Ncm) (p < 0.01). The interfacial strengths, converted from PRT, were calculated at 10.6 MPa and 5.74 MPa for the anodized and machined group implants, respectively. Conclusions: Anodization of orthodontic MIs may enhance their early-phase retention capability, thereby ensuring a more reliable source of absolute anchorage.