Journal of aerospace engineering & technology (vol4, issue1) by STM Journals Publication

ISSN: 2348-7887

(JoAET) Jan - April 2014

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Journal of Aerospace Engineering & Technology (ISSN: 2348-7887) Focus and Scope Covers ? Aeroacoustics ? Aeroelasticity, Aerodynamics and Fluid Mechanics ? Dynamics and Control ? Flight Simulation and Mechanics ? Propulsion and Combustion ? Unmanned Air Vehicles (UAV*S)

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Prof. Sundara Ramaprabhu

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Editorial Board

Dr. Parammasivam Kanjikovil Mahali Anna University , Madras, India.

Dr. Subba Raju P.V Prof. & Chairman, Aeronautical & Mechanical Engineering Division, Institute of Aeronautical Engineering, Dundigal, Hyderabad, India.

Prof. Kalyan Prasad Sinhamahapatra Head, Department of Aerospace Engineering, IIT Kharagpur, India.

Prof. Murthy RL C Department of Aerospace Engineering, Indian Institute of Science, Bangalore, India.

Dr Yuwaraj Marotrao Ghugal Department of Applied Mechanics, Govt. College of Engineering Station Road, Osmanpura, Aurangabad, India.

Vijayaraja Kengaiah Prof. , Head, Aeronautical Engg. Dept., P.B. College of Engg., Chennai, India.

Dr Ashok K Singh Department of Aerospace Engineering, Defence Institute of Advanced Technology, Girinagar, Pune, India.

Amarjeet Singh Department of Computer Applications, Institute of Environment and Management, Lucknow, Uttar Pradesh, India.

Dr. Tiauw Hiong Go Nanyang Technological University, Singapore.

Dr. Ravishekar Kannan Computational Fluid Dynamics (CFD), Research Corporation, United States.

Mr. Ravindranath Nayak Head, Aerospace Electronics & Systems Division, National Aerospace Laboratories (NAL), CSIR Airport Rd, Kodihalli, Bangalore India.

Dr. M. R. Nayak Head, Aerospace Electronics & Systems Division, and Advisor to Director National Aerospace Laboratories, India.

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STM JOURNALS

I take the privilege to present the hard copy compilation for the [Volume 4 Issue (1)] of Journal of Aerospace Engineering & Technology (JoAET). The intension of JoAET is to create an atmosphere that stimulates creativeness, research and growth in the area of Aerospace Engineering & Technology. The development and growth of the mankind is the consequence of brilliant Research done by eminent Scientists and Engineers in every field. JoAET provides an outlet for Research findings and reviews in areas of Aerospace Engineering & Technology found to be relevant for National and International recent developments & research initiative. The aim and scope of the Journal is to provide an academic medium and an important reference for the advancement and dissemination of Research results that support high level learning, teaching and research in the domain of Aerospace Engineering & Technology. Finally, I express my sincere gratitude and thanks to our Editorial/ Reviewer board and Authors for their continued support and invaluable contributions and suggestions in the form of authoring writeups/ reviewing and providing constructive comments for the advancement of the journals. With regards to their due continuous support and co-operation, we have been able to publish quality Research/Reviesw findings for our customers base. I hope you will enjoy reading this issue and we welcome your feedback on any aspect of the Journal.

Dr. Archana Mehrotra Director STM Journals

Journal of Aerospace Engineering & Technology

Contents

1. Aircraft Design and Development: An Overview Air Commodore (Retd.) SC Gupta

2. Comparison of Control Strategies using Soft Computing Techniques for Shunt Active Power Filters in Aircraft Power Utility of 400 Hz Saifullah Khalid, Bharti Dwivedi

3. Effect of Damage on the Modal Parameters of Composite Plates Vinaykumar Beelagi, Ramesh S. Sharma

4. Handling Qualities-Fighter Aircraft Air Commodore (Retd.) SC Gupta

Journal of Aerospace Engineering & Technology ISSN: 2348-7887 Volume 4, Issue 1 www.stmjournals.com

Aircraft Design and Development: An Overview Air Commodore (Retd.) SC Gupta* Department of Aeronautical Engineering (UG & PG), MVJ College of Engineering, Bangalore, India

Abstract This paper addresses issues related to airworthiness standards, air loads criticality, handling qualities requirements, and flight testing from the personal experiences of the author. Current control technology has significant impact on airworthiness specification description. Combination of air loads cases needs judicial selection along with control criteria. Control software can be synthesized in real time for required handling criteria. Concurrent aeroelasticity needs consideration for optimum aerodynamic design features that is highlighted herein.

Keywords: airworthiness, aeroelasticity, aircraft

Journal of Aerospace Engineering & Technology ISSN: 2348-7887 Volume 4, Issue 1 www.stmjournals.com

Comparison of Control Strategies using Soft Computing Techniques for Shunt Active Power Filters in Aircraft Power Utility of 400 Hz Saifullah Khalid*, Bharti Dwivedi Electrical Engineering Department, I. E. T., Lucknow, U. P., India

Abstract Three different control strategies for extracting reference currents for shunt active power filters optimized using adaptive tabu search and genetic algorithm have been compared and their performance has been evaluated under different load conditions. The compensation ability of different control strategies will be compared and suggestion will be given for optimum strategy to be used under different loads. Simulation results using MATLAB have been included.

Keywords: Active power filter (APF), constant instantaneous power control strategy, sinusoidal current control strategy, synchronous reference frame strategy, genetic algorithm, adaptive tabu search algorithm, harmonic compensation

Journal of Aerospace Engineering & Technology ISSN: 2348-7887 Volume 4, Issue 1 www.stmjournals.com

Effect of Damage on the Modal Parameters of Composite Plates Vinaykumar Beelagi1*, Ramesh S. Sharma2 Department of Mechanical Engineering, RV College of Engineering, Bangalore, India

Abstract In the present work, the effect of delaminations on the natural frequencies and mode shapes of composite panels has been analyzed, both experimentally and by finite element technique. Bi-woven glass cloth with epoxy resin as matrix is made use of to prepare the laminate. Vacuum-bagging method was employed in the fabrication of specimens. Specimens were prepared with 3 mm thickness and tested for three different boundary conditions, viz., clamped-free-free-free (C-F-F-F), clamped-free-clamped-free (C-F-C-F) and clamped-clamped-clamped-clamped (C-C-C-C). The traditional “strike method” has been used to measure the vibration properties. The modal characteristics of the specimens have been obtained by studying their impulse response. Each specimen has been subjected to impulses through a hard-tipped hammer which is provided with a force transducer and the response measured through the accelerometer. The impulse and the response are processed through a computer aided fast Fourier transform (FFT) analyzer. Vibration parameters such as natural frequencies, modal damping and the corresponding mode shapes were extracted and results are presented. In addition, modal assurance criterion (MAC) has been calculated as a quality indicator for mode shapes evaluated through experiments.

Keywords: Composite plates, natural frequency, mode shape and modal assurance criterion

Journal of Aerospace Engineering & Technology ISSN: 2348-7887 Volume 4, Issue 1 www.stmjournals.com

Handling Qualities-Fighter Aircraft Air Commodore (Retd.) SC Gupta* Professor & Head, Department of Aeronautical Engineering, MVJ College of Engineering, Bangalore, India

Abstract Aircraft handling qualities quantify the extent to which the pilot can control the aircraft and accomplish the task with ease or difficulty. Stick force gradient, recovery rates from maneuvers, layout of controls, case of control operations, and mission accomplishment form the part of hqs. Current equivalent systems of flight control of fly-by-wire aircraft with statically unstable airframe aim at meeting maneuver demands and provide required hqs. The hqs criteria are addressed herein largely for the fighter class of aircraft especially with the unstable airframes.

Keywords: Fighter aircraft, hqs, aircraft

*Author for Correspondence E-mail: satish_chander_gupta@yahoo.co.in