Dynamic Real-Time Simulation Approach to Power Management Modelling for CubeSat Applications
Rachid Darbali-Zamora1, Eduardo I. Ortiz-Rivera2, Amilcar A. Rincon-Charris2
1Department of Electrical and Computer Engineering, Mayaguez, PR, United States
/2Department of Mechanical Engineering, Inter American University of Puerto Rico-Bayamon, Bayamon, PR, United States

Over the last decade, the use of small satellite technologies has grown to such lengths that they have proven to be viable solution to space science and exploration, rivaling traditional satellites. They are composed of a variety of subsystems: Communication, on-board computer, attitude determination and control as well as an electronic power supply. Power is provided by solar panels mounted on its one of the CubeSat sides. Storage is used to supply power when the CubeSat solar panels are shaded by Earth’s shadow region, where sunlight is not readily available. Surface area limitations create a challenge for most CubeSats, limiting solar panel generation. This requires developing simulation models that can perform coordination between, generation, storage and consumption. As more components are added, execution time can become extensive, leading to slow simulation execution. The use of Real-Time (RT) simulation enables fast execution speed my performing simulations in real-time. Herein, a RT simulation of a CubeSat power management is presented. Simulation results are obtained for a 3U CubeSat configuration operating at varying irradiance, temperature and load conditions.