Department of Electrical and Electronics Engineering

Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1925

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Author: search.filters.author.Mukherjee, Bijoy KrishnaSubject: search.filters.subject.EEE

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Now showing 1 - 10 of 16
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    Design, Fabrication, DSP Implementation and Comparison of Simulated Performance of a Linear Induction Motor for PI and Hα Control Schemes
    (Maglev, 2004-10) Mukherjee, Bijoy Krishna
    From conveyors to the high-speed MAGLEV vehicles, from knitting machines to the sophisticated robotic systems, Linear Induction Motors (LIMs) have got a wide range of applications. They have got all the potential to replace the age-old belt-pulley driven systems completely in the coming years. In the present work, a flat, single sided, short primary LIM, which can be used as a linear propulsion system, has been designed and the same has been fabricated. Thereafter PI controllers are designed to implement the field oriented control scheme for use in variable speed drives. The whole system is simulated in the SIMULINK environment of MATLAB and the simulation results are shown. Since the PI controllers cannot handle model uncertainties and parameter variation effects, a robust controller has also been designed. Implementation of the whole scheme is to be done using a DSP in TMS320LF2407A platform. Dry run of the programs has already been done. The inverter is under construction.
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    Design, fabrication, testing and finite element analysis of a lab-scale LIM
    (IEEE, 2004-12) Mukherjee, Bijoy Krishna
    Linear induction motors (LIMs) have got potential to replace the age old belt-pulley driven systems and the likes, which are in use for conversion of rotary to linear motion in most of the applications. In the present work a 3-phase, 50 Hz, 4-pole, 220 V, 320 W, 2.5 m/s LIM has been designed, fabricated and successfully tested on a test track. 2-D finite element analysis of the LIM has been done with ANSYS 7.1 to evaluate typical field and circuit variables. The results are in good agreement with the analytical as well as experimental values.
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    Fractional Order Modeling and GA Based Tuning for Analog Realization with Lossy Capacitors of a PID Controller
    (IMECS, 2009-03) Mukherjee, Bijoy Krishna
    In this paper, first it has been studied how the performance of a PID controller deteriorates when implemented with lossy capacitors in its analog realization. Thereafter it has been shown that the lossy capacitors can be effectively modeled by fractional order terms. Finally, a novel GA based method has been proposed to tune the controller parameters such that the original performance is retained even though realized with the same lossy capacitors. Simulation results have been presented to validate the usefulness of the technique.
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    Adaptive Fault-Tolerant Coulombic Satellite Attitude Control
    (scribd, 2015) Mukherjee, Bijoy Krishna
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    Automatic recovery of a combat aircraft from a completed Cobra and Herbst maneuver: A sliding mode control based scheme
    (IEEE, 2016) Mukherjee, Bijoy Krishna
    Cobra and Herbst are two complex post-stall air combat maneuvers popularly executed by the present-day fighter aircraft. At the end of these maneuvers, the aircraft usually develops either a high negative flight path angle or a high negative flight path angle rate apart from a considerably low velocity. Therefore, the aircraft needs to recover from such undesired flight conditions as quickly as possible. Usually this recovery is achieved manually by the pilot. In the present paper, a novel automatic recovery strategy is proposed. Two recovery schemes - a partial recovery scheme to get back to a level flight condition quickly without worrying about velocity and a full recovery scheme to restore the initial steady level trim completely (both velocity and altitude wise) are presented. As these maneuvers are executed in high angle of attack regions, the aircraft flight dynamics becomes highly nonlinear and coupled requiring use of nonlinear control methods. In the present work, sliding mode control technique is considered as, apart from handling the nonlinearities effectively, it also provides robustness to uncertainty in the aerodynamic data. MATLAB simulation results are presented to first demonstrate the execution of the maneuvers and thereafter to validate the proposed recovery schemes.
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    Angular rate stabilization using fixed-time continuous sliding mode control
    (IEEE, 2019) Mukherjee, Bijoy Krishna
    This paper proposes a novel fault-tolerant control algorithm for angular rate stabilization of satellite system. The control algorithm belongs to the class of super-twisting sliding mode control theorem applicable to relative degree one systems which ensures chattering free control input and also finite-time convergence. Lyapunov stability theorem is used to prove finite-time stability of the closed loop system under designed control input. The expression of convergence time is calculated and is found to be independent of initial conditions. Numerical simulations verify the effectiveness of the proposed control algorithm.
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    Real-Time Air Quality Estimation from Station Data Using Extended Fractional Kalman Filter
    (Springer, 2020-07) Mukherjee, Bijoy Krishna
    Air, soil and water pollutions have the greatest risk factors for human health. There are different types of air pollutants which are emitted from human activities. One of these pollutants is nitrogen dioxide (NO2) which is produced from fossil fuel-based energy and use of motor vehicles. Since India is facing deteriorated air quality due to economic development, air quality management is becoming a real challenge. In 2015, an emission inventory (EI) was developed for India with 2015 as the base year. This EI is developed on an engineering model approach which is based on a technology-linked energy emission modeling approach. Accurate EI is important for future air quality modeling and air quality management. Since EI has uncertainties in data, some kind of estimation is essential. Estimation through extended fractional Kalman filter (EFKF) is considered in the present paper, and its performance is found to be superior as compared to a standard extended Kalman filter (EKF).
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    Exploiting Fractional Order PID Controller Methods in Improving the Performance of Integer Order PID Controllers: A GA Based Approach
    (AIP, 2009-10) Mukherjee, Bijoy Krishna
    The paper is divided into three parts. The first part gives a brief introduction to the overall paper, to fractional order PID (PIλDμ) controllers and to Genetic Algorithm (GA). In the second part, first it has been studied how the performance of an integer order PID controller deteriorates when implemented with lossy capacitors in its analog realization. Thereafter it has been shown that the lossy capacitors can be effectively modeled by fractional order terms. Then, a novel GA based method has been proposed to tune the controller parameters such that the original performance is retained even though realized with the same lossy capacitors. Simulation results have been presented to validate the usefulness of the method. Some Ziegler‐Nichols type tuning rules for design of fractional order PID controllers have been proposed in the literature [11]. In the third part, a novel GA based method has been proposed which shows how equivalent integer order PID controllers can be obtained which will give performance level similar to those of the fractional order PID controllers thereby removing the complexity involved in the implementation of the latter. It has been shown with extensive simulation results that the equivalent integer order PID controllers more or less retain the robustness and iso‐damping properties of the original fractional order PID controllers. Simulation results also show that the equivalent integer order PID controllers are more robust than the normal Ziegler‐Nichols tuned PID controllers.
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    Three-Axis Global Magnetic Attitude Control of Earth-Pointing Satellites in Circular Orbit
    (Wiley, 2017-03) Mukherjee, Bijoy Krishna
    This paper addresses the controllability and global stability issues of a magnetically actuated satellite in the geomagnetic field. The variation of the geomagnetic field along the orbit, which is time varying in nature, makes the dynamics of the satellite time varying also. Sufficient conditions for controllability of such a time varying magnetic attitude control system are given. As a major contribution, it is proven that the three-axis controllability of the spacecraft actuated by the magnetic actuators is possible and it does not depend on the initial angular velocity of the spacecraft. Global controllability is a precursor to global stability. Therefore, exponential stability for an arbitrarily high initial angular velocity and an arbitrary initial orientation is proven next for a proportional-derivative control law using averaging theory. It is also proven that even an iso-inertial satellite can be stabilized using the time invariant feedback control, which was hitherto not possible, even using time variant conventional control. Simulation results are presented under different initial orientations and angular velocities of the satellite in the presence of favorable and unfavorable gravity gradient torques to validate the proposed control method.