Simultaneous Vibration Suppression and Energy Harvesting
Final rept. 15 Aug 2009-15 Aug 2013
VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG CENTER FOR INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
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Research results in support of creating a multifunctional UAV spar with capabilities of harvesting energy, storing energy, sensing, actuating and computing are presented. A multi layer multifunctional spar is fabricated and modeled. Experiments are performed to validate the model and simulations are reported that illustrate the use of harvested energy to perform active feedback control for gust alleviation is small UAVs. In addition a compensation algorithm was developed to account for the voltage dependence of the coupling coefficient in the feed back control law resulting from the PZT nonlinearity. A minimum energy control law was developed, implemented and compared against standard control laws. Formulas are derived to show how long a UAV must fly before enough energy is harvested to be able to suppress a gust.
- Pilotless Aircraft
- Non-electrical Energy Conversion