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The temperature swing over lunar terrain is harsh and it can fall to as low as 70K during lunar nights in the polar region[1], which has significant interest as a preferred landing site. Most of the lunar rover designs incorporate, radioisotope heater units (RHU) to maintain the temperature during the nights. A 50W electrical power system(EPS) design for a Lunar rover, which does not contain a radioisotope...
A new design method for PID controller using user-specified gain margin and phase margin for delayed systems has been proposed. The proposed PID controller is particularly useful in auto-tuning. The controller parameters are calculated using several approximations and elimination processes. The robustness of the proposed controller is verified by different simulation examples.
Inverted pendulum is a highly nonlinear device and is a perfect experimenting bed for the design of classical and contemporary control techniques. In this paper Linear quadratic regulator(LQR) controllers and Model Reference adaptive controllers(MRAC) has been theoretically implemented on the inverted pendulum quanser kit. The objective here is to balance the inverted pendulum in an upright position...
Worldwide the use of nonlineardevices have increased sharply in recent times. As a result, harmonic pollution has become a vital problem. Harmonic in the power system network interfere with the system equipments, disturbing their normal operation which can deteriorate the quality of the delivered power. In this context, this paper presents an efficient and fast method for estimation of harmonics and...
Since adaptive controller does not rely fully on dynamic system models, therefore, there exist a necessity of fast adaptation to achieve improved tracking performance using high adaptive gain. However, attaining fast adaptation using high adaptive gain is a serious limitation of adaptive controllers which may raise certain serious issues. First, it causes large frequency excursions and bursting in...
This paper presents a new idea to solve the selective harmonic elimination (SHE) equations with non equal dc sources using Hybrid Newton Raphson Method (HNRM). This technique is a combination of genetic algorithm (GA) and Newton Raphson Method (NRM). The HNRM technique effectively eliminates the lower order harmonics from the output voltage of the converter. In this paper, it has been also shown that,...
In this paper, the electrostatic performance of junctionless dual material double gate (JLDMDG) silicon on insulator (SOI) is compared with that of JLDMDG silicon on nothing (SON) MOSFET. The 2D device simulation is used for the comparison of major electrostatic figure of merits such as threshold voltage (VTh), subthreshold swing, Drain Induced Barrier Lowering (DIBL) and Ion/Ioff ratio. Further,...
In this paper, charge plasma based dual material graded channel double gate (DMGCDG) junctionless transistor is proposed. The charge plasma concept based graded channel is implemented without using separate ion implantation. A dual material gate with two different workfunctions produce additional electric field at source side to enhance the carrier transport efficiency as compared to graded channel...
In this paper identification of electroencephalogram (EEG) based brain-computer interface (BCI) for motor imagery (MI) task is planned by an efficient adaptive neuro-fuzzy classifier (NFC). The linguistic hedge (LH) is used for proper elicitation and pruning of the fuzzy rules and network is trained using scaled conjugate gradient (SCG) and speeding up SCG (SSCG) techniques. The performance of the...
The placement of Thyristor controlled series capacitor (TCSC) reduces transmission losses, increases the available capacity, and improves the voltage profile. This paper presents the implementation of the thyristor switched series capacitor in the transmission network of the power system. The TCSC has been installed in series with the two parts of the transmission line. The performance of the system...
In this paper a multiconfiguration stator has been designed and implemented using LABVIEW based real-time hardware platform. Multiconfiguration stator has wide flexibility of operation as PMSM, BLDC, SRM or induction motor with any number of configured phases and poles per phases. Two Phase Bipolar operation using 4-leg 8 MOSFETs and Two Phase Split Unipolar operation using six MOSFET unipolar circuit...
This paper deal with the design and implementation of low cost, indigenous 2-axis ultrasonic anemometer having real time SD card and Internet of Things (IOT) enabled data logging. Ultrasonic Anemometer is a measuring instrument which is capable of measuring wind velocity (i.e. both wind speed and direction) in a challenging environment like ladakh where conventional type anemometers are not working...
The characteristics of junctionless(JL) SON(Silicon on Nothing) FinFET, JL Bulk FinFET and SOI(Silicon on Insulator) JNT(Junctionless nanowire transistor) transistors were compared. A Silicon on nothing transistor have substrate with air filled dielectric. JL SON FinFET have better on/off current ratio and short channel effect (SCE) by reducing channel thickness due to substrate channel junction....
This paper presents a detailed look into the IEC 61850 protocol, its structure and substation communication model. The GOOSE messaging service which is an important part and also one of the major benefits of the IEC 61850 protocol has also been discussed. The various steps for implementation of IEC 61850 protocol and transmission of GOOSE messages in SEL relays have been studied. A laboratory experimental...
In this paper, the performance of three-phase five-level neutral-point-clamped inverter using different carrier waves namely trapezoidal (T) and trapezoidal triangular (TT) with different modulation techniques applying three different modulating signals is studied. In this study, three basic level-shifted multicarrier PWM strategies namely, alternative phase opposition disposition (APOD), phase opposition...
In this article, novel leakage control techniques are adopted in Feed-Through Logic (FTL) for low power high-speed designs. The FTL design has a unique feature; the outputs are partially evaluated before its input data arrive and quick final evaluation is performed as soon as input signals reach. However, FTL designs suffer from high leakage and standby current in static and dynamic modes which increase...
This paper develops a model for Wells turbine using Xilinx system generator (XSG)toolbox of Matlab. The Wells turbine is very popular in oscillating water column (OWC) wave energy converters. Mostly, the turbine behavior is emulated in a controlled DC or AC motor coupled with a generator. Therefore, it is required to model the OWC and Wells turbine in real time software like XSG. It generates the...
This paper presents a single-stage non-isolated modified multiplier SEPIC converter for high voltage gain. The modified and multiplier technique reported in the literature are used to conventional SEPIC converters to obtain high voltage gain and low voltage stress across the switch. The proposed topology combines merits of both of these techniques simultaneously in the SEPIC converter to evolve a...
This paper presents a novel single-stage non isolated switched capacitor based AC-DC converter for power factor correction (PFC). This converter features single switch, transformer less high voltage gain, and improves the power factor, reduces THD and voltage stress across the switch. Average current mode controller has been used to achieve PFC. In this paper proposed converter topology, its principle...
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