Papers by Dr. Anil Kumar Gillawat
SAE technical paper series, Nov 21, 2019
The fuel consumption and performance of the Internal Combustion (IC) engine is improved by adopti... more The fuel consumption and performance of the Internal Combustion (IC) engine is improved by adopting concepts of an adiabatic engine. An experimental investigation for different load conditions is carried out on a water-cooled, constant-speed, twin-cylinder diesel engine. This research is intended to emphasize energy balance and emission characteristic for standard uncoated base engine and adiabatic engine. The inner walls of diesel engine combustion chamber are thermally insulated by a top coat of Metco 204NS yttria-stabilized zirconia (Y2O3ZrO2) powder (YSZ) of a thickness of 350 mm using plasma spray coating technology. The same combustion chamber is also coated with thermal barrier coating (TBC) bond coats of AMDRY 962 Nickle chromium aluminum yttria of thickness of 150 mm. The NiCrAlY powder specially designed to produce coating’s resistance to hot corrosion. The combination of this ceramic material produces excellent high-temperature thermal barrier coating (TBC) resistant to thermal cycling stresses and strains. The engine valves, engine heads, and engine pistons were thermal barrier ceramic coated and computerized experimental results were compared to the base engine. Experimental results justified TBC engine to give a better diesel engine combustion cycle analysis. The main objective of this study is to increase power and torque parameters resulting in a decrease in fuel consumption. Furthermore, the exhaust emission parameter was found to be decreased. The noise level of the adiabatic engine was found satisfactorily.
Lecture notes in mechanical engineering, 2020
Minimization of joint torque has been a keen interest of researchers to predict the trajectory to... more Minimization of joint torque has been a keen interest of researchers to predict the trajectory to achieve the desired position. Dynamic equations are used to define objective function and range of motions of human upper limb joints are set as constraints. MATLAB genetic algorithm (GA) toolbox is used to minimize the joint torques. Desired position is defined as a nonlinear constraint. Optimization problem consists of eleven objectives and thirty-one variables. Torques at joints are fed as objective function such that the magnitude of the torque is minimized. Variables used may be broadly classified into four groups: angular displacements, angular velocities, and angular accelerations comprising 10 sets each. One more variable is added as time of rotation. GA parameters are required to be predicted for the developed objective function. Analytic hierarchy process (AHP) approach is used to determine the GA parameters. The results obtained are satisfactory.
Journal of The Institution of Engineers (India): Series C, 2022
Compressed air supply being one of the crucial parameters for analysis of the industrial operatio... more Compressed air supply being one of the crucial parameters for analysis of the industrial operation, moisture and lubricant have to be removed from it before supplying to sensitive instruments and controlling actuators. The compressed air supply plant consists of two sections, viz. air compressors and air dryers. The compressed air sucked from the environment is passed through the oil separator to supply it to the plant air receiver. Air dryers remove moisture/water concentrated from the compressed air using various mechanical/chemical processes. Since the dew point may be used to measure the dryness of the air, the lowest dew point is achieved by operating air dryers at their optimum efficiency and removing the maximum possible moisture from the system. A survey and experimentation are carried out on the air dryer system to increase the system’s effectiveness at a reduced cost of compressed air. This research aims to improve the performance of a refrigeration air dryer by utilizing the outlet air heat to maintain inlet temperature for compressed air. The pinch analysis is used to find out the energy conservation opportunities, make the system more efficient, and reduce the operation cost simultaneously. The results show that installing the plate-type heat exchangers (PHE) between the refrigeration and desiccant air dryer saves 14.35% of the total heat interactions of the systems. This recovered heat (11.34 kW) resulted in the reduction of 15.26% of the operation cost (₹2,60,665 per annum). A negligible pressure drop of 0.05 kg/cm2 is also observed in the system.
IAENG, 2012
The authors have developed a shoulder joint model considering RRR type serial manipulator. The se... more The authors have developed a shoulder joint model considering RRR type serial manipulator. The servo motors are placed in such a way that they are dynamically balanced. For estimating the torques for each motor L-E method is employed. The joint architecture developed depicts circumduction, pronation and supination and abduction and adduction. Torque values are obtained both analytically and practically. Graphs are plotted and the results obtained are supportive to consider the joint for rehabilitation.
Springer, 2020
Minimization of joint torque has been a keen interest of researchers to predict the trajectory to... more Minimization of joint torque has been a keen interest of researchers to predict the trajectory to achieve the desired position. Dynamic equations are used to define objective function and range of motions of human upper limb joints are set as constraints. MATLAB genetic algorithm (GA) toolbox is used to minimize the joint torques. Desired position is defined as a nonlinear constraint. Optimization problem consists of eleven objectives and thirty-one variables. Torques at joints are fed as objective function such that the magnitude of the torque is minimized. Variables used may be broadly classified into four groups: angular displacements, angular velocities, and angular accelerations comprising 10 sets each. One more variable is added as time of rotation. GA parameters are required to be predicted for the developed objective function. Analytic hierarchy process (AHP) approach is used to determine the GA parameters. The results obtained are satisfactory.
Advanced Science, Engineering and Medicine, 2020
This paper presents an application of Lagrange–Euler approach for dynamic analysis of three link ... more This paper presents an application of Lagrange–Euler approach for dynamic analysis of three link with revolute type (RRR-type) rigid serial manipulators. MATLAB code is programmed for Lagrange– Euler approach for RRR-type serial manipulator for generating joint torque equations and plotting these joint torque values for given range of angular rotations. This study is useful for understanding the effect of combinations of link rotation on joint torque behaviour. Maximum value of required joint torques obtained can be used for selection of motors for any mechanism with serial links with revolute joints performing given task.
SAE Technical Papers, 2019
The fuel consumption and performance of the Internal Combustion (IC) engine is improved by adopti... more The fuel consumption and performance of the Internal Combustion (IC) engine is improved by adopting concepts of an adiabatic engine. An experimental investigation for different load conditions is carried out on a water-cooled, constant-speed, twin-cylinder diesel engine. This research is intended to emphasize energy balance and emission characteristic for standard uncoated base engine and adiabatic engine. The inner walls of diesel engine combustion chamber are thermally insulated by a top coat of Metco 204NS yttria-stabilized zirconia (Y2O3ZrO2) powder (YSZ) of a thickness of 350 mm using plasma spray coating technology. The same combustion chamber is also coated with thermal barrier coating (TBC) bond coats of AMDRY 962 Nickle chromium aluminum yttria of thickness of 150 mm. The NiCrAlY powder specially designed to produce coating’s resistance to hot corrosion. The combination of this ceramic material produces excellent high-temperature thermal barrier coating (TBC) resistant to thermal cycling stresses and strains. The engine valves, engine heads, and engine pistons were thermal barrier ceramic coated and computerized experimental results were compared to the base engine. Experimental results justified TBC engine to give a better diesel engine combustion cycle analysis. The main objective of this study is to increase power and torque parameters resulting in a decrease in fuel consumption. Furthermore, the exhaust emission parameter was found to be decreased. The noise level of the adiabatic engine was found satisfactorily.
Robotica, 2022
A mathematical model is proposed for a revolute joint mechanism with an n-degree of freedom (DOF)... more A mathematical model is proposed for a revolute joint mechanism with an n-degree of freedom (DOF). The matrix approach is used for finding the relation between two consecutive links to determine desired link parameters such as position, velocity and acceleration using the forward kinematic approach. The matrix approach was confirmed for a proposed 10 DOF revolute type (R-type) human upper limb model with servo motors at each joint. Two DOFs are considered each at shoulder, elbow and wrist joint, followed by four DOF for the fingers. Two DOFs were considered for metacarpophalangeal (mcp) and one DOF each for proximal interphalangeal (pip) and distal interphalangeal (dip) joints. MATLAB script function was used to evaluate the mathematical model for determining kinematic parameters for all the proposed human upper limb model joints. The simplified method for kinematic analysis proposed in this paper will further simplify the dynamic modeling of any mechanism for determining joint torq...
Journal of Physics: Conference Series, 2019
Human upper limb behavior considering two degrees of freedom each for the shoulder joint, elbow a... more Human upper limb behavior considering two degrees of freedom each for the shoulder joint, elbow and wrist joint. For the fingers, 2 Degree of Freedom (DOF) for metacarpophalangeal joints (mcp) and 1-DOF for proximal interphalangeal joint (pip) and Distal Interphalangeal joints (dip) each is considered for study. A simple matrix approach with Euler angle theory is proposed for evaluating kinematic parameters using forward kinematic approach. Matrix formulation is done in program and the outputs are recorded. Position, Linear velocity and linear accelerations are computed at the link joints, which are directly can be used for dynamics calculation. Stepper motors are used at each joints for controlling upper limb motions. A control algorithm and program are developed using open loop system. Microprocessor control using comport is developed with drivers for set of motors used at joints.
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Papers by Dr. Anil Kumar Gillawat