neelanjana baruah - Academia.edu (original) (raw)

Papers by neelanjana baruah

Research paper thumbnail of A PID Controller Design Approach for Robust Stability of Arbitrary Order Plants with Time Delays

A controller designed specifically for a nominal process model often works well for the nominal p... more A controller designed specifically for a nominal process model often works well for the nominal plant model, but may fail even by a little change in it. Robust control deals with analysis and controller design for such imperfect system with bounded modelling errors. A lot of research has been done and many methods are available for robust design of the plants. In this paper, a graphical technique is followed to find all PID controller gains that satisfy the robust stability constraint of a given DC motor model with time delay.

Research paper thumbnail of EEG-Based Hand Movement Recognition: Feature Domain and Level of Decomposition

Lecture Notes in Mechanical Engineering, 2021

Research paper thumbnail of Proposal of Sliding Mode Controller based on Backstepping Technique for Control of Magnetic Levitation System

International Journal of Engineering and Advanced Technology, 2021

Magnetic Levitation System (MLS) is a nonlinear system and it is used extensively in many areas. ... more Magnetic Levitation System (MLS) is a nonlinear system and it is used extensively in many areas. The system's goal is to use the non-contact principle to magnetize the coil and cause the objects to float to a specific height. The magnetic force and the current flowing through the coil have a nonlinear relationship. In this paper first design of the backstepping controller is done to attain the wanted floating in presence of system related uncertainties and system behavior is witnessed. Then a Sliding Mode Controller (SMC) based on backstepping procedure is formulated. The control gains in this controller are designed in such a way that the characteristics polynomial whose coefficients are control gains is strictly Hurwitz and the closed loop system's asymptotic stability is assured. Simulations are performed and the magnetic ball tracking is observed considering step signal as reference in presence of disturbances. More accuracy is observed in terms of following the referenc...

Research paper thumbnail of A Generalized Matlab Simulink Model of a Three Phase Induction Motor

International Journal of Innovative Research in Science, Engineering and Technology, 2015

Induction motors are the most widely used motor drives in industry because of its simple construc... more Induction motors are the most widely used motor drives in industry because of its simple construction and other advantages such as reliable operation, low initial cost, easy operation and simple maintenance, high efficiency and having simple control gear for starting and speed control. This usefulness of this motor has resulted into a lot of research including the transient behaviour of the machine. This paper presents a step by step Simulink implementation of an induction machine using dq0 axis transformations of the stator and rotor variables in the arbitrary reference frame. At first the important formulas are stated and then according to these formulas a generalized model of a three phase induction motor is developed and implemented. The model is used to investigate the effects of variations in the machine size and parameter values on the dynamic performance of induction machine. The proposed system has been developed and simulated by using Matlab/Simulink.

Research paper thumbnail of A Fuzzy Logic Based Expert System for Determination of Health Risk Level of Patient

International Journal of Research in Engineering and Technology, 2015

The aim of this study is to design a fuzzy expert system for calculating the health risk level of... more The aim of this study is to design a fuzzy expert system for calculating the health risk level of a patient. The fuzzy logic system is a simple, rule-based system and can be used to monitor biological systems that would be difficult or impossible to model with simple, linear mathematics. The designed system is based on the modified early warning score (MEWS).The system has 5 input field and 1 output field. The input fields are blood pressure, pulse rate, SPO2 (it is an estimation of the oxygen saturation level in blood.), temperature, and blood sugar. The output field refers the risk level of the patient. The output ranges from 0 to 14. This system uses Mamdani inference method. A larger value of output refers to greater degree of illness of the patient. This paper describes research results in the development of a fuzzy driven system to determine the risk levels of health for the patients. The implementation and simulation of the system is done using MATLAB fuzzy tool box.

Research paper thumbnail of Fuzzy-Logic Based Speed Control of Induction Motor Considering Core Loss into Account

Intelligent Control and Automation, 2012

Rotor flux and torque of an induction motor (IM) are decoupled to obtain performance of DC motor.... more Rotor flux and torque of an induction motor (IM) are decoupled to obtain performance of DC motor. The decoupling strategy has been developed in terms of stator current components where the core loss is neglected. Many different controllers including fuzzy logic controller (FLC) with neglecting core loss have been designed to control the speed of induction motor. The outcome of investigation about the effect of core loss on indirect field oriented control (IFOC) has been concluded that the actual flux and torque are not reached to the reference flux and torque if core loss is neglected. Thus, the purpose of this paper is to propose a fuzzy logic speed controller of induction motor where flux and torque decoupling strategy is decoupled in terms of magnetizing current instead of stator current to alleviate the effects of core loss. The performances of proposed fuzzy-logic-based controller have been verified by computer simulation. The simulation of speed control of IM using PI and FLC are performed. The simulation study for high-performance control of IM drive shows the superiority of the proposed fuzzy logic controller over the conventional PI controller.

Research paper thumbnail of Voltage stability analysis of a power system

Research paper thumbnail of A PID Controller Design Approach for Robust Stability of Arbitrary Order Plants with Time Delays

A controller designed specifically for a nominal process model often works well for the nominal p... more A controller designed specifically for a nominal process model often works well for the nominal plant model, but may fail even by a little change in it. Robust control deals with analysis and controller design for such imperfect system with bounded modelling errors. A lot of research has been done and many methods are available for robust design of the plants. In this paper, a graphical technique is followed to find all PID controller gains that satisfy the robust stability constraint of a given DC motor model with time delay.

Research paper thumbnail of EEG-Based Hand Movement Recognition: Feature Domain and Level of Decomposition

Lecture Notes in Mechanical Engineering, 2021

Research paper thumbnail of Proposal of Sliding Mode Controller based on Backstepping Technique for Control of Magnetic Levitation System

International Journal of Engineering and Advanced Technology, 2021

Magnetic Levitation System (MLS) is a nonlinear system and it is used extensively in many areas. ... more Magnetic Levitation System (MLS) is a nonlinear system and it is used extensively in many areas. The system's goal is to use the non-contact principle to magnetize the coil and cause the objects to float to a specific height. The magnetic force and the current flowing through the coil have a nonlinear relationship. In this paper first design of the backstepping controller is done to attain the wanted floating in presence of system related uncertainties and system behavior is witnessed. Then a Sliding Mode Controller (SMC) based on backstepping procedure is formulated. The control gains in this controller are designed in such a way that the characteristics polynomial whose coefficients are control gains is strictly Hurwitz and the closed loop system's asymptotic stability is assured. Simulations are performed and the magnetic ball tracking is observed considering step signal as reference in presence of disturbances. More accuracy is observed in terms of following the referenc...

Research paper thumbnail of A Generalized Matlab Simulink Model of a Three Phase Induction Motor

International Journal of Innovative Research in Science, Engineering and Technology, 2015

Induction motors are the most widely used motor drives in industry because of its simple construc... more Induction motors are the most widely used motor drives in industry because of its simple construction and other advantages such as reliable operation, low initial cost, easy operation and simple maintenance, high efficiency and having simple control gear for starting and speed control. This usefulness of this motor has resulted into a lot of research including the transient behaviour of the machine. This paper presents a step by step Simulink implementation of an induction machine using dq0 axis transformations of the stator and rotor variables in the arbitrary reference frame. At first the important formulas are stated and then according to these formulas a generalized model of a three phase induction motor is developed and implemented. The model is used to investigate the effects of variations in the machine size and parameter values on the dynamic performance of induction machine. The proposed system has been developed and simulated by using Matlab/Simulink.

Research paper thumbnail of A Fuzzy Logic Based Expert System for Determination of Health Risk Level of Patient

International Journal of Research in Engineering and Technology, 2015

The aim of this study is to design a fuzzy expert system for calculating the health risk level of... more The aim of this study is to design a fuzzy expert system for calculating the health risk level of a patient. The fuzzy logic system is a simple, rule-based system and can be used to monitor biological systems that would be difficult or impossible to model with simple, linear mathematics. The designed system is based on the modified early warning score (MEWS).The system has 5 input field and 1 output field. The input fields are blood pressure, pulse rate, SPO2 (it is an estimation of the oxygen saturation level in blood.), temperature, and blood sugar. The output field refers the risk level of the patient. The output ranges from 0 to 14. This system uses Mamdani inference method. A larger value of output refers to greater degree of illness of the patient. This paper describes research results in the development of a fuzzy driven system to determine the risk levels of health for the patients. The implementation and simulation of the system is done using MATLAB fuzzy tool box.

Research paper thumbnail of Fuzzy-Logic Based Speed Control of Induction Motor Considering Core Loss into Account

Intelligent Control and Automation, 2012

Rotor flux and torque of an induction motor (IM) are decoupled to obtain performance of DC motor.... more Rotor flux and torque of an induction motor (IM) are decoupled to obtain performance of DC motor. The decoupling strategy has been developed in terms of stator current components where the core loss is neglected. Many different controllers including fuzzy logic controller (FLC) with neglecting core loss have been designed to control the speed of induction motor. The outcome of investigation about the effect of core loss on indirect field oriented control (IFOC) has been concluded that the actual flux and torque are not reached to the reference flux and torque if core loss is neglected. Thus, the purpose of this paper is to propose a fuzzy logic speed controller of induction motor where flux and torque decoupling strategy is decoupled in terms of magnetizing current instead of stator current to alleviate the effects of core loss. The performances of proposed fuzzy-logic-based controller have been verified by computer simulation. The simulation of speed control of IM using PI and FLC are performed. The simulation study for high-performance control of IM drive shows the superiority of the proposed fuzzy logic controller over the conventional PI controller.

Research paper thumbnail of Voltage stability analysis of a power system