Search results for "Take-off"
showing 3 items of 3 documents
AUTOMATIC TAKE-OFF OR LANDING PATH FOLLOWING IN TURBULENT AIR FOR UAS - AN EKF BASED PROCEDURE
2015
By using the Extended Kalman Filter (EKF) an accurate take-off or landing flight path following in turbulent air is performed. The tuned up procedure employs simultaneously two different EKF: the first one estimates gust disturbances, the second one affords to determine the necessary controls displacements for rejecting those ones. In particular, the first filter, by using instrumental measurements gathered in turbulent air, estimates wind components. The second one obtains command laws able to follow the desired flight path. To perform this task aerodynamic coefficients have been modified by adding entirely new derivatives or synthetic increments to basic ones whose might the kind of chang…
Life Cycle Assessment applied to a new system for sea wave energy harvesting
2022
A new technology for wave energy harvesting is currently under development at the University of Palermo. The target is the exploitation of sea waves in the Mediterranean Sea, and small islands. The paper suggests an innovative technology for the wave energy harvesting in onshore areas. Indeed, the machine can be installed on existing infrastructures, like breakwaters of harbours. A small-scale prototype was already tested in laboratory. In this paper, a Life Cycle Assessment is performed to evaluate the environmental impacts of this technology, considering the potential energy production as functional unit.
Take-off analysis of the Olympic ski jumping competition (HS-106m).
2007
Abstract The take-off phase (approximately 6 m) of the jumps of all athletes participating in the individual HS-106 m hill ski jumping competition at the Torino Olympics was filmed with two high-speed cameras. The high altitude of the Pragelato ski jumping venue (1600 m) and slight tail wind in the final jumping round were expected to affect the results of this competition. The most significant correlation with the length of the jump was found in the in-run velocity ( r =0.628, p n =50). This was a surprise in Olympic level ski jumping, and suggests that good jumpers simply had smaller friction between their skis and the in-run tracks and/or the aerodynamic quality of their in-run position …