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Aerospace2025EPSRedundancyCubeSatPower Systems
1U CubeSat EPS — N-1 Redundant Power System
Client: Aviation & Aerospace University BangladeshRole: Architect, Schematic & PCB Designer
Overview
A flight-ready Electrical Power System for a 1U CubeSat — distributed N-1 redundant architecture taken from reliability modelling through schematic, 96×96mm PC-104 layout, assembly and live telemetry.
Challenge
Design a CubeSat EPS with N-1 redundancy raising reliability from R=0.797 to R=0.991, including MPPT solar charging, multi-rail regulation, 16-channel telemetry, and live Python dashboard integration.
Our Approach
- Distributed N-1 redundant architecture modelling
- BQ24650 MPPT solar charging with CC-CV control
- Power path with LTC3130/TPS63020 regulators and ideal diodes
- ADS8688 16-bit SPI ADC telemetry with fuel gauge
- MATLAB/Simulink simulation (500km orbit, 35-min eclipse)
Technical Highlights
- N-1 redundancy: R = 0.991 (vs 0.797 conventional)
- BQ24650 MPPT with SOC above 90% across LEO orbits
- Converter efficiency sustained above 85% at typical loads
- 16-channel telemetry with live Python dashboard
Deliverables
- ✓EPS schematic and PCB layout
- ✓Reliability modelling report
- ✓MATLAB/Simulink simulation
- ✓Live Python telemetry dashboard