Aircraft Cabin Active Noise Cancellation Mechanism Using an Actuator Gimbal System

To reduce the noise pollution inside an aircraft cabin and make the air travel comfortable to passengers, this project develops the required subsystems for a seat side active noise cancellation mechanism which uses a gimbal system and a single tone noise cancellation algorithm. A three degree of freedom gimbal system is designed using three linear actuators to adjust the movement of the speaker. A control program is developed and implemented to control the lengths of the linear actuators based on the required movement of the speaker. For noise control, a program is developed which generates wave signals for the noise source speaker and collects the noise signal from the measurement microphone. A FFT program has also been implemented to identify the frequency of the noise signal which can be used to drive the noise cancellation speakers. Therefore, this project lays the groundwork for the development of an effective and practical aircraft cabin active noise cancellation system.