| Citation: | DONG Huifen, XIE Hui, XU Hai. Reliability evaluation of motor controllers based on FMEA and DFTA[J]. Journal of Aerospace Power, 2025, 40（9）：20230656 doi: 10.13224/j.cnki.jasp.20230656
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The motor controller, as a critical component of the power system in electric aircraft, plays a pivotal role in ensuring the flight safety of the aircraft. Therefore, the reliability evaluation of the controller is one of the key steps in its design process. To enhance the accuracy of reliability assessment, a reliability analysis method for the motor controller was proposed by combining Failure Mode and Effects Analysis with Dynamic Fault Tree Analysis. This method not only focused on the failure modes of the controller but also examined its dynamic characteristics, aiming to provide a comprehensive evaluation of its reliability. Using the motor controller of an electric propulsion system in a quadrotor electric vertical takeoff and landing aircraft for a case study, the failure modes were analyzed based on the controller’s topology, and its failure probability was calculated as 1.18×10−6 through dynamic fault tree analysis. The feasibility and effectiveness of this method were validated, offering a reference approach for the reliability assessment of motor controllers in electric aircraft.
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