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ITU-pSAT II project aims to design and develop standardized bus architecture and an ADCS for pico and nano sized satellites. In order for nano-satellites to perform more capable missions, precise attitude control and more capable bus designs are needed. ITU-PSAT II is considered as follow-on to the ITU-PSAT I project, it includes multi-purpose bus and a 3-axis controlled platform, which can be used in future missions with different payload configurations. ITU-pSAT II bus and ADCS operation architecture also embeds a health monitoring system in order to cooperatively detect and successfully handle the highly possible failure modes (such as sensor, actuator failures and errors). In this paper, we review the architecture of ADCS, its subcomponents and strategy of combining ADCS operation modes.

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In this paper, we present the design and analysis of an innovative modular cubesat structure for ITU pSAT II mission. The design hinges on innovative modular structural columns which support rack-like operation for our ITU pSAT II nanosatellite. ITU pSAT II aims to demonstrate on-orbit a standardized bus architecture and an indigenous in-house developed ADCS. The envisioned structure provides the much needed flexibility to the satellite designers during the design, development and test cycle. Specifically, the structure allows the designers to change the location of subsytems or perform design modifications to the subystems without the need and the necessity to re-design the main structure. This new modular structure is also in accordance with standards that are determined by Cal Poly State University for the cubesats and thus carries one-to-one compatibility with launch pods. In this paper, we explain in detail the design and the analysis (FEM, quasi-static and modal) phase while step-by-step addressing deficiencies on the already developed and commercially available cubesat structures.

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