Honors College Thesis
 

Wing Flutter Suppression via Distributed Electric Propulsion

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https://ir.library.oregonstate.edu/concern/honors_college_theses/g445cn26t

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  • This research aims to demonstrate the viability of actively controlled distributed-electric propulsion as a method to postpone flutter in high aspect-ratio elastic wings. A semi-wing on a spring mount with two propellers powered by electric motors, mounted at alternate pitch angles relative to the chord line, was used as the experimental setup. A full state feedback controller is implemented on a microcontroller with IMU feedback to actively regulate the motors. Numerical simulations of the full-state feedback controller showed desirable performance for suppression of pitch and plunge oscillations. Implemented on the physical system, the controller successfully decreased the settling time for pitch oscillations. Unsatisfactory performance for plunge was observed. Thus, the controller was unsuccessful in suppressing plunge oscillations. However, an auxiliary PD controller based on vertical acceleration was successful in suppressing plunge oscillations. The above observations support the viability of the controller to suppress plunge and pitch oscillations in a full state feedback controller with a better observer. Methods are proposed for increasing the accuracy of the observer and improving the performance of vectored distributed electric propulsion for flutter suppression.
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