Wind Energy Harvesting System - Energy Harvesting Autonomous Sensor Systems - page 73

6.5 mm
FIGURE 2.33
Piezoelectric wind energy harvester under a wind speed of V a =7m/sand V b =1m/s.
Referring to Table 2.1 , the percentage of deviation between the calculated
theoretical and measured experimental values for the tip deflections of the
piezoelectric wind energy harvester is found to be less than 1%. This shows
that the proposed relationship developed between Bernoulli's aerodynamic
theory and the cantilever beam theory is pretty accurate and established. In
addition, the derived equations, starting from the incoming wind speed dif-
ferences to the beam deflection, are good representations of the experimental
3 mm
FIGURE 2.34
Piezoelectric wind energy harvester under a wind speed of V a =5m/sand V b =2m/s.