Control and optimization on portal frame for current flow using piezoeletric on buoy

Abstract

The growing demand for remote sensing for weather forecasts, telecommunication amplifiers, and monitoring long flights, has been generating demand for alternative power sources. Consequently, this leads to a micro self-power source on site, to avoid unnecessary batteries replacement and power line transmission. A common source of energy is wind or waves that are harvested using vibration transducer, thus actuating as generators and sensors. In this dissertation, a portal frame structure with piezoelectric material using waves as a source of vibration energy. First, an initial dynamic characterization was made for sine and beating excitation. Second, a parametric sensibility analysis was made and an optimization process was carried out using Particle Swarm Optimization (PSO). Third, to further improve the performance the State-Dependent Riccati Equation (SDRE) controller was used varying the external load. The results shows that the PSO did not choose the same parameter as present on the literature with an small gain (.5%) in performance. However, the SDRE controller shown an increase of 0.59𝐶 to 3𝐶 in a period of 200 𝑠.