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Preliminary study of guided landing system for high altitude balloon / Muhammad Zulfadli Abdul Ghafar

Preliminary study of guided landing system for high altitude balloon_Muhammad Zulfadli Abdul Ghafar_A2_2015_NI
Sistem pendaratan berpandu terbukti berfaedah dari segi teknologi terkini untuk belon kaji cuaca. Walau bagaimanapun, kajian yang mengaplikasikan sistem pendaratan berpandu terhadap belon kaji cuaca amat terhad kerana kajian tersebut masih baru dan ramai masih tidak menyedari akan kewujudan teknologi ini. Oleh itu, kajian terhadap beberapa sistem pendaratan berpandu yang berpotensi dengan kos yang rendah dan mudah perlu dijalankan. Untuk projek ini, sistem payung terjun berbentuk segi empat tepat telah dipilih dan kajian terhadap parameter asas aerodinamik dijalankan. Parameter prestasi asas termasuk daya angkat dan seretan yang bertindak pada sistem paraglider, sudut meluncur, berat sistem dan halaju sistem payung terjun dalam kestabilan penerbangan meluncur. Hasil daripada projek ini ialah membina sebuah prototaip paraglider kawalan jauh. Terdapat tiga reka bentuk prototaip model dengan spesifikasi yang berbeza. Model pertama menggunakan NACA 0012 sebagai aerofoil manakala model kedua mengeksploitasi LS NASA(1)-0417 untuk aerofoil. Model ketiga adalah parafoil elips buatan kedai dengan panjang rentang 1.2 m dan maksimum lebar 0.7 m. Lencongan parafoil dikawal oleh pesongan brek yang terletak di tepi kepak . Pesongan brek kanan untuk ke arah kanan dan begitu juga sebaliknya. Kedua-dua pesongan brek akan mengurangkan kelajuan meluncur dan untuk suar semasa mendarat. Model prototaip ketiga mempunyai konfigurasi meluncur yang terbaik kerana ia mengembung dengan sempurna untuk kedua-dua pra- ujian dan sesi ujian, dengan jarak anggaran 2.5 m dari ketinggian 30 m. Model prototaip kedua mengalami kesukaran untuk meluncur kerana pembukaan parafoil agak kecil. Tetapi penambahbaikan dibuat bagi memastikan ia mengembung dan meluncur ke hadapan. Model prototaip pertama tidak memberikan apa-apa hasil yang ketara kerana ralat pada fabrikasi. ______________________________________________________________________________________ Guided landing system has proven to be advantageous in terms of advance technology for high altitude balloon. However, there is very limited study that implies the application of guided landing system towards the high altitude balloon as the application is still new and not many has aware of the existence of this technology. Therefore, it is important to study several potential landing vehicle particularly low cost and convenient. In this project, parafoil system is chosen and study on the basic aerodynamics parameters is carried out. In addition, the basic fundamental performance parameters which include the lift and drag force acting on the paraglider system, the glide angle, the system weight and the velocity of the parachute system in steady gliding flight. The outcome of this project is to develop a prototype remote paraglider. There are three prototype model design of different specifications and was labelled as first, second and third prototype model. The first model has applied NACA 0012 as the airfoil whereas the second model exploit NASA LS(1)- 0417 for the airfoil. The third model was a ready-made elliptic parafoil with spanwise of 1.2 m and maximum chordwise of 0.7 m. The maneuvering of the parafoil is controlled by the deflection of the outer trailing edge brakes or flaps. Right brake deflection for right direction and vice versa. Both brake deflection will reduce the glide speed and for flare during landing. The result indicated that the third prototype model has the best glide configuration as it inflated perfectly for both the pre-test and test session which provides a horizontal gliding distance of approximately 2.5 meters from 30 meters of altitude. Initially, the second prototype model undergoes difficult to glide as the opening of the parafoil is quite small. But improvement was made to ensure it inflated and glide forward. The first prototype model did not provide any significant result due fabrication error.
Contributor(s):
Muhammad Zulfadli Abdul Ghafar - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
Guided landing system ; balloon; gliding flight
First presented to the public:
6/1/2015
Original Publication Date:
10/10/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Aerospace Engineering
Citation:
Extents:
Number of Pages - 103
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-10-10 16:16:22.21
Date Last Updated
2020-05-06 16:58:47.273
Submitter:
Nor Hayati Ismail

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Preliminary study of guided landing system for high altitude balloon / Muhammad Zulfadli Abdul Ghafar1 2019-10-10 16:16:22.21