/CropBox [ 0 0 612 792 ]/Contents 137 0 R/Rotate 0/Parent 1 0 R/Resources << /Font << However, in this condition, the dynamic deflection occurs mainly at the PCB center, which means that the solar cells adjacent to this area are relatively vulnerable to delamination or fracture compared with the others located at the PCB edge. endobj 24 0 obj stream The PCB panel is made out of FR-4 material with dimensions of . /ProcSet [ /PDF /Text /ImageC ]/ExtGState << /GS0 45 0 R >> Table 2 presents the mass budget of the solar panel module shown in Figure 2. Specifications of the nylon wire and burn resistor. /TT0 50 0 R/TT1 48 0 R>> The microcontroller commands the relay switch to automatically cut off the input power to the resistor once the deploy signal is transmitted from the DSSW to the microcontroller via an analog to digital converter port. /TT0 50 0 R/TT1 48 0 R>> Review articles are excluded from this waiver policy. 3 0 obj stream The deployable solar panel module is basically composed of a PCB panel with solar cells to generate power in-orbit, a burn wire triggering HRM to implement a holding and release function on the solar panel, stiffeners to increase the stiffness of the solar panel, and torsional hinges to provide torque for panel deployment. However, although the commercial SMA mechanisms have many technical advantages and space heritages, the use of these devices is impractical for CubeSat applications because of their high cost, required power, and spatial constraints in the limited volume of the CubeSat. Therefore, the conventional mechanisms might not be able to provide a sufficient constrain force to the deployable solar panels for 6 U or larger CubeSats. Figure 7 shows the release function test setup of the solar panel module to validate the stable release function of the mechanism. << /Length 0 >> To secure the contact between the burn resistor and nylon wire, the position of the resistor is slightly higher than the surface of the guide rail interface for nylon wire tightening. stream Copyright © 2013 IAA. To confirm the effectiveness of the proposed design of a solar panel module for the launch vibration environment, sine and random vibration tests were performed at qualification level. The measured release times were less than 0.78 s, although there were slight variations. Figure 14 shows an example of the launch vibration test setup for the solar panel module for -axis excitation of the solar panel. Several types of the commercial nonexplosive SMA actuator [19, 20] have been developed and used in various space missions. Seventeen triple-junction GaAs solar cells with a conversion efficiency of 30% are attached on the front side of the PCB, so the expected power generation capacity of the solar panel is 19.5 W. In the launch phase, the solar panel is stowed and constrained to the rail structure of the CubeSat by an HRM located at the PCB edge, as shown in Figure 2. 32 0 obj << /Length 0 >> 26 0 obj 11 0 obj https://doi.org/10.1016/j.actaastro.2013.11.011. /TT0 50 0 R/TT2 46 0 R/TT1 48 0 R>> /ProcSet [ /PDF /Text /ImageC ]/ExtGState << /GS0 45 0 R >> /XObject << endstream /Fm0 34 0 R/Fm1 95 0 R>> Figure 18 shows the acceleration responses obtained from the solar panel with bolted junctions during the modal survey tests along the -axis. The in-plane directional constraint is achieved by a combination of ball-and-socket joints implemented on the brackets, as shown in Figure 3(a). 6 0 obj Copyright © 2019 Tae-Yong Park et al. 2019, Article ID 7346436, 13 pages, 2019. https://doi.org/10.1155/2019/7346436, 1Space Technology Synthesis Laboratory, Department of Aerospace Engineering, Chosun University, Gwangju, Republic of Korea, 2Dream Space World Co., Ltd., 193, Munji-ro, Yuseong-gu, Daejeon, Republic of Korea. To validate the effectiveness of the solar panel module design, release function tests were performed under various test conditions. /CropBox [ 0 0 612 792 ]/Contents 89 0 R/Rotate 0/Parent 1 0 R/Resources << << /Length 0 >> G-Sab deployment tumbles the CubeSat, requiring long stabilization, whereas XSAS can deploy without inducing additional rotations upon the satellite. << /Length 0 >> >> 8 0 obj A demonstration model of a printed circuit board-based solar panel stiffened by a high-pressure fiberglass-laminated G10 material was fabricated and tested to validate the effectiveness of the design and functionality of the mechanism under various test conditions. /CropBox [ 0 0 612 792 ]/Contents 123 0 R/Rotate 0/Parent 1 0 R/Annots [ ]/Resources << >> /Font << In this study, a 6 U CubeSat’s solar panel module with a new version of a burn wire triggering type of HRM was proposed. A test-bed for the solar panel deployment testing has been developed, supporting the solar array during deployment reproducing the dynamical situation in orbit. As the size of CubeSat increases from 1 U to 6 U, one of the technical challenges in the construction of an advanced CubeSat is to achieve sufficient power generation in restricted volume and electrical budgets. << /Length 0 >> Therefore, the flight model for the mechanism will reflect the shortest required power supply time, regardless of the DSSW signal. /TT0 50 0 R/C2_0 84 0 R/TT2 46 0 R/TT1 48 0 R>> The results of structural analysis prior to the launch vibration tests indicated that the predicted maximum force acting on the nylon wire was 57 N when the random qualification load was applied to the -axis of the solar panel.
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