Electromagnetic Interference and its Effects on Acoustic Sensor Measurements

Kurzfassung

The increasing trend of electric propulsion systems in aviation industry demands the development of reliable methods for specifying noise and vibration signatures of new components, such as the electric motor. However, acoustic sensors (vital for such measurements) can be susceptible to significant performance degradation due to Electromagnetic Interference (EMI) caused by electrified propulsion system. This study is a step towards investigating the application of acoustic sensors for aeroacoustic and vibroacoustics mea�surements generated by electric motors in electrified aircraft propulsion systems. The research focuses on the impact of EMI on the accuracy of these acoustic measurements obtained through microphones and accelerometers. The thesis will explore how EMI induces electrical noise in sensor cables and circuits, and analyze the susceptibility of different sensor types to EMI specific to a 5 kW electric motor, depending on various conditions. The results indicate that there was not much impact of EMI on the sensor. The findings indicate minimal EMI effects on sensors for smaller motors under the specific test conditions. The study concludes that further research is required to explore this phenomena in greater depth, potentially using stronger motors.