Design and Implementation of On-board Electrical Power ... - OUFTI-1
Design and Implementation of On-board Electrical Power ... - OUFTI-1
Design and Implementation of On-board Electrical Power ... - OUFTI-1
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• Solar panels temperature <strong>of</strong> 5 ◦ C.• Battery heater turned on for 35 min per orbit [7].• 3.3V supplied by EPS2.Batteries voltage [V] 3 3.7 4.2<strong>Power</strong> input per orbit [mWh] 2,100.3 2,660.4 3,080.4Tx usage (η ampl = 30%) % 5 16 24Tx usage (η ampl = 50%) % 17 35 49EPS2 turned OffAssumptions:• Longest eclipse, i.e. 35.9% <strong>of</strong> orbit duration [6].• Solar panels temperature <strong>of</strong> 5 ◦ C.• Battery heater turned on for 35 min per orbit [7].• 3.3V supplied by EPS1.Batteries voltage [V] 3 3.7 4.2<strong>Power</strong> input per orbit [mWh] 2,100.3 2,660.4 3,080.4Tx usage (η ampl = 30%) % 15 26 34Tx usage (η ampl = 50%) % 34 51 654.4.2 Mean caseAssumptions:• Mean eclipse, i.e. 24.2% <strong>of</strong> orbit duration [6].• Solar panels temperature <strong>of</strong> 15 ◦ C.• Battery Heater turned on for 10% <strong>of</strong> time.• 3.3V supplied by EPS2.Batteries voltage [V] 3 3.7 4.2<strong>Power</strong> input per orbit [mWh] 2,566.5 3,228.8 3,559.9Tx usage (η ampl = 30%) % 18 31 37Tx usage (η ampl = 50%) % 38 59 70Figure 4.3 shows the consumptions <strong>of</strong> the <strong>OUFTI</strong>-1 subsystems in the mean case.45
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