Reliability-Based Fault Analysis and Modeling of Satellite Electrical Power Subsystems Using Fault Tree and Simulation Tools

TL;DR

This paper presents a comprehensive reliability analysis of satellite electrical power systems using fault tree modeling and simulation tools, achieving high mission assurance through integrated analysis.

Contribution

It introduces a combined approach of fault simulation and fault tree analysis for satellite power systems, enhancing reliability assessment accuracy.

Findings

Achieved a total mission assurance of 0.999.

Demonstrated the effectiveness of fault tree analysis with Windchill software.

Validated system reliability through MATLAB simulations.

Abstract

One of the most important satellite subsystems is its electric power subsystem. The occurrence of a fault in the satellite power system causes the failure of all or part of the satellite. Calculating the overall reliability of the power system before the mission is crucial in improving the design of the satellite power system. Each component of the power system may malfunction due to pressure, launch pressure, and operating conditions. Accordingly, in this paper, first, a healthy and faulty system for the components of the electrical power system is simulated with MATLAB. Finally, by drawing a fault tree to analyze the reliability of the power subsystem, overall mission reliability, power system fault rate, and overall fault rate of the mission are calculated by Windchill software. Finally, a total mission assurance of 0.999 was achieved, indicating the high reliability of the simulated system.