Journal of aerospace engineering & technology (vol4, issue2) by STM Journals Publication

ISSN: 2348-7887

(JoAET) May - August 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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Dr. Rajiv Prakash School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi, India.

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Dr. Pankaj Poddar

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Dr. Rakesh Kumar

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Prof. Subash Chandra Mishra

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.

Director's Desk

STM JOURNALS

I take the privilege to present the hard copy compilation for the [Volume 4 Issue (2)] 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. Attitude Determination using Extended Kalman Filter for Elliptical Orbit Satellites Ilamaran G, Anitha G

2. Design and Fabrication of a Flapping Wing Unmanned Aerial Vehicle with Bird Kinematics Nandu Jith P.J., Harsh Gupta

3. Air Intake Aerodynamics S.C. Gupta

Journal of Aerospace Engineering & Technology ISSN: 2231-038X (online), ISSN: 2348-7887 (print) Volume 4, Issue 2 www.stmjournals.com

Attitude Determination using Extended Kalman Filter for Elliptical Orbit Satellites Ilamaran G, Anitha G* Department of Aerospace Engineering, MIT, Anna University, Chennai, India Abstract This paper investigates the influence of eccentricity on the performance of the attitude determination and control subsystem (ACDS) pointing of passive low earth orbit (LEO) satellites stabilized by a gravity-gradient boom. The contribution of this work is two-fold. First, satellite attitude dynamics and kinematics are modeled by introducing the orbit eccentricity in the equation of motion of an LEO satellite in order to provide the best scenarios in which satellite operators can keep the nominal functionality of LEO satellites with a gravity-gradient boom. Second, a quaternion-based extended Kalman filter (EKF) is analyzed when the orbit eccentricity is considered in order to determine the influence of this disturbance on the convergence and stability of the filter. The simulations of this work are based on the real parameters of LEO satellite stabilized by gravity-gradient boom. The obtained results show that the orbit eccentricity has a big influence on the pointing system accuracy by causing micro-vibrations that affect the geocentric pointing

Keywords: Spacecraft attitude dynamics, Kalman filter, gravity gradient torque, eccentricity

Journal of Aerospace Engineering & Technology ISSN: 2231-038X (online), ISSN: 2348-7887 (print) Volume 4, Issue 2 www.stmjournals.com

Design and Fabrication of a Flapping Wing Unmanned Aerial Vehicle with Bird Kinematics Nandu Jith P.J.*, Harsh Gupta Amity Institute of Space Science and Technology, Amity University, Noida, New Delhi, India Abstract The artificial design of the bird was started out with the inspiration of bird flight and breaking that complex motion into a mechanism that is easily replicable. The design went with an active reference to the already existing as well as unique flapping wing UAV titled ʻsmart birdʼ by the Festo Corporation. But unlike the bird designed by Festo, we have changed the active torsion mechanism design and made it completely mechanical for steady flight. The bird will also feature video surveillance features with live feed send to any device on ground through Wi-Fi. Thus the design has taken a smart turn to building an UAV that flies like a bird, making it blend in and undetectable to the naked eye and provide surveillance capability over an area to any number of people on ground thus providing a new version to the concept ʻeyes in skyʼ.

Keywords: Biologically Inspired Flight, Torsion Mechanism Using Material Elasticity, Experimental Techniques, Cost Effectiveness *Author for Correspondence E-mail: nandujithpj@gmail.com

Journal of Aerospace Engineering & Technology ISSN: 2231-038X (online), ISSN: 2348-7887 (print) Volume 4, Issue 2 www.stmjournals.com

Air Intake Aerodynamics S.C. Gupta* Department of Aeronautical Engineering, MVJ College of Engineering, Bangalore, India

Abstract Air Intake aerodynamic design for fighter aircraft is described herein. Axial flow compressor is considered. The air intake pressure recovery mass flow requirement, flow distortion and flow stability are explained. Some design related issues are addressed. Air intakes of varied design are compared. Computational numerical techniques are brought out for design and analysis.

Keywords: Aerodynamics, Compressor, Air intake