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Improved design and analysis of mysat’s structure and antenna deployment system

Improved design and analysis of mysat’s structure and antenna deployment system / Amir Shafiq Ahmad Ghozali
MYSat adalah cubaan pertama mahasiswa dan mahasiswi Univesiti Sains Malaysia (USM) untuk membina sebuah CubeSat. Subsistem struktur MYSat sebelum in pernah dikaji dan didapati daripada kajian tersebut struktur sebelum ini memepunyai masalah aksesibiliti antara subsistem-subsistem lain. Perkara ini juga menyebabkan struktur sebelum ini mempunyai kesukaran utuk memasang dan menyahimpun struktur tersebut. Reka bentuk system penyebaran antena (ADS) yang baru juga diperlukan disebabkan perubahan menyeluruh pada struktur CubeSat tersebut. Reka bentuk dwi-modul dipilih untuk projek ini berdasarkan kemampuan ia mempunyai fleksibiliti reka bentuk yang banyak dan kemudahan ia untuk dibina bahagian-bahagian struktur CubeSat mengunakan blok Al 6061 yang kecil dan mengurangkan sisa buangan daripada proses permesinan. Reka bentuk struktur adalah berdasarkan reka bentuk struktur CubeSat EnduroSat telah dilukis menggunakan Solidwork dan CATIA. Reka bentuk terakhir dikenakan dua jenis analisis utama, iaitu analisis structural static dan analisis dinamik menggunakan ANSYS 2019 R3 untuk memaparkan kebolehan struktur tersebut menghadapi bebanan yang tercatat dalam buku JEM payload handbook yang diperolehi dari JAXA. Analisis struktur statik terbahagi kepada keadaan keseimbangan dan daya kuasi-statik semasa pelancaran. Manakala, focus utama untuk analisis dinamik pula adalah analisis modal dan analisis getaran rawak. . Perubahan telah dibuat pada reka bentuk pertama untuk mengurangkan kelenturan dan bebanan pada reka bentuk tersebut. Melalui hasil simulasi analisis ANSYS 2019 R3, didapati kelenturan maksimum adalah 0.0038 mm dan bebanan pula sebanyak 58.472 MPa. Reka bentuk struktur terakhir telah dicetak menggunakan pencetak 3D untuk melalui analysis seterusnya. Reka bentuk ADS adalah berdasarkan reka bentuk terakhir struktur, dimana ia menggunakan mekanisa pembakaran wayar di samping mempunyai konfigurasi simpanan antena yang baru. Wayar nilon memegang antena supaya berada di dalam posisi yang betul di dalam modul antena dan ujian telah dilakukan untuk mengesahkan fungsi dan masa penyebaran antena. _______________________________________________________________________________________________________ The structural subsystem for MYSat had been researched previously and needs improvement due to the lack of accessibility of other subsystems with the previous structure design of MYSat. The other problem also occurred from the previous design, which results in the difficulty of assembling and disassembling the structure. The new design for an antenna deployment system (ADS) is also required due to the changes in overall structure configuration. A modular design has been chosen for this project as it has high flexibility in its design and easy to manufacture its parts from a smaller block of aluminium 6061 which reduces the amount of waste from the machining process. The structure design based on the EnduroSat structure is drawn by using Solidworks and CATIA. The final design is subjected to two types of main analysis; static analysis and dynamic analysis that have been performed using ANSYS 2019 R3 to demonstrate the ability of the structure to withstand load mention in JEM payload handbook provided by JAXA. The static analysis is further divided into equilibrium condition and quasi-static load condition during launch while the focus of dynamics analysis is the modal analysis and random vibration analysis. Iterations on the design are done to minimize the deformation and stress on the initial design. The final design showed that a maximum deformation of 0.0038 mm and maximum equivalent stress of 58.472 MPa are obtained from ANSYS 2019 R3. The main structure has been prototyping using a 3D printer for further analysis. ADS design is based on the final design of the structure, and the burn-wire mechanism has been used with a new antenna's stowed configuration. The nylon-string holds the antenna in position inside the antenna deployment module, and the deployment test has been conducted to verify the functionality of the design and the deployment time of the antenna.
Contributor(s):
Amir Shafiq Ahmad Ghozali - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875007945
Language:
English
Subject Keywords:
structural; MYSat; improvement
First presented to the public:
8/1/2020
Original Publication Date:
10/2/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Aerospace Engineering
Citation:
Extents:
Number of Pages - 126
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-10-02 16:32:47.465
Submitter:
Mohd Jasnizam Mohd Salleh

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