(SoE) School of Engineering

<p>Shiv Nadar University is a comprehensive, multidisciplinary, research-focused, and student-centric University offering a full range of academic programs at the undergraduate, postgraduate and doctoral level. With state-of-the-art infrastructure, the University comprises of academic wings, sophisticated labs, international standard sports facilities, amphitheaters, auditorium, conference rooms and smart classrooms. The University&rsquo;s goal is to become internationally recognized for the quality of its research and creative endeavors and their applicability to improving quality of life, generating new insights and expanding the boundaries of human knowledge creativity. Committed to excellence in teaching, research and service, the University aims to serve the higher education needs of India and the world beyond.</p>

Shiv Nadar University

A method is proposed for the design of constant-gain feedback control laws which reduce trajectory sensitivity to small system parameter variations and ensure the prescribed degree of stability for Discrete-Time Systems. The selected performance index is of standard linear regulator type; modified to include a quadratic sensitivity term and weighting function ( alpha )**2**k with alpha greater than 1, which ensures that the closed-loop poles will lie inside the circle of radius 1/ alpha in the complex plane. An example of a two-area load frequency control system is presented to illustrate the application of the design procedure.

Electrical Engineering

World University root node

IEE Proceedings D: Control Theory and Applications

SENSITIVITY REDUCED DESIGN OF DISCRETE LINEAR REGULATOR WITH PRESCRIBED DEGREE OF STABILITY.

Heads are one of the important accessories to pressure vessels and heat exchangers. The end of the vessels are closed by means of the heads before putting them into operation. The common types in use are: ellipsoidal, spherically dished (torispherical), and flat head. This paper describes a computer program which has been written in Fortran for the design of the types of various heads. For the flat heads, both the ASME Code formulas and the TEMA formula are used when a pass partion groove is present and the higher value is used. For the flat heads without pass partion groove ASME Code is followed. The program has been organized into a MAIN program and three subroutines (COVER, FLTCOV and HEAD). The flow charts for the MAIN program and the subroutines are given.

Chemical Engineering

Hydrocarbon Processing

COMPUTER PROGRAM FOR PRESSURE VESSEL HEAD DESIGN.

This work deals with energy conservation in the petroleum refineries. These refineries produce usable products from the crude and, in the process, consume large amounts of energy in the form of fuel, steam and electricity. They also provide a great opportunity to save energy since the present level of energy consumption is approximately 7 multiplied by 10**5 BTU vertical bbl compared to a theoretical value of 7 multiplied by 10**4 BTU vertical bbl arrived at by thermodynamic analysis. The authors look at some of the important developments made in this field, integrate them all together and calculate a conservative value for the expected energy savings. As an example, a refinery processing 100,000 bbld crude has been taken as the basis. 45 refs.

Chemical Age of India

POTENTIAL FOR ENERGY CONSERVATION IN PETROLEUM REFINERIES.

A method is proposed for the design of constant gain output feedback control laws which reduce trajectory sensitivity to small system parameter variations and ensure the prescribed degree of stability for linear continuous-time systems. The selected performance index is of standard linear regular type: modified to include a quadratic sensitivity term and weighting function e**2** alpha **t with alpha greater than 0, which ensures that the closed loop poles will lie to the left of the line Re(s) equals minus alpha in complex s-plane. An example of a 2-area load frequency control system is presented to illustrate the application of the design procedure.

Journal of the Institution of Engineers (India): Electrical Engineering Division

SENSITIVITY REDUCED DESIGN OF CONTINUOUS LINEAR REGULATOR WITH PRESCRIBED DEGREE OF STABILITY.

Computer Science and Engineering

Proceedings - Symposium on Computer Arithmetic

SIGN DETECTION IN NON-REDUNDANT RESIDUE NUMBER SYSTEM WITH REDUCED INFORMATION.

In fixed tubesheet exchangers, the temperature differential between the shell and the tubes causes differential thermal expansion. Since the tubes are not free to move, severe stresses are induced in the tubes unless a provision is made to accommodate this expansion, especially in the case of high temperature units. The flanged and fluid expansion joint, installed on the shell side of a fixed tubesheet exchanger, accommodates this thermal expansion. This joint falls under the category of ring expansion joints and is commonly used. This paper describes the Fortran computer program which designs and analyzes flanged and flued exchanger expansion joints. The working of the program has been tested by analyzing the expansion joints and comparing theoretical results with those obtained from practice.

COMPUTER PROGRAM FOR FLANGED AND FLUED EXPANSION JOINTS.

Vessel parts are weakened when material is removed to provide nozzle openings. The stress concentration is high at the edge of the opening and decreases with distance from it becoming negligible beyond twice the diameter of the opening. These openings require compensation or reinforcement to avoid vessel failure in those regions due to high stress concentration. This can be done either by increasing the entire shell thickness, or by using a self-reinforcing nozzle. This paper is concerned with the CAD of reinforcing nozzle.

COMPUTER PROGRAM FOR NOZZLE OPENING REINFORCEMENT DESIGN.

DECENTRALIZED CONTROLLERS AND OBSERVERS FOR AUTOMATIC GENERATION CONTROL OF MULTI-AREA POWER SYSTEMS.

A method to determine suboptimal control law for large scale dynamic systems using more than one reduced order aggregated models has been proposed in this paper. The suboptimal control law derived using this method yields better performance than the one obtained by a single subsystem or a simple combination of more than one subsystems and it is less sensitive to the selection of the eigenvalues. For large-scale systems (n greater than 8) the method is computationally very attractive.

IETE Journal of Research

SUBOPTIMAL CONTROL OF LARGE-SCALE DYNAMIC SYSTEMS.

The authors consider the application of a method based on control law reduction using Davison's model order reduction technique for multi-area load-frequency control systems. A decentralized suboptimal controller is obtained for a two-area power system. The results show that the method based on control law is computationally simpler and the performance of the controller obtained by this method compares well with those obtained by other available methods of design.