The present paper deals with the piezoelectric energy harvesting from aeroelastic vibration with simply supported plates. The supersonic panel flutter energy harvester is composed of a piezoelectric element attached to the structures and a conventional harvesting circuit. A diode bridge of four diodes is connected to the piezoelectric element and it provides a mechanism of current rectification. Aeroelastic analysis of simply supported plates with a piezoelectric element is based on a finite element method and a quasi-steady aerodynamics. The effect of location of the piezoelectric element on converged voltage in the harvesting system is examined through the numerical examples.
The increasing amount of air traffic has escalated both the damage caused by aircraft noise and the workload on air traffic controllers. Future air traffic control systems are expected to ensure a fair distribution of aircraft noise to reduce the damage per capita. In this paper, we propose an automatic trajectory-planning algorithm that disperses arriving trajectories simultaneously with adjusting arrival time and avoiding other aircrafts during flight to reduce the noise per capita on the ground surrounding the arrival route. This method estimates the noise on the ground by identifying in advance ground points at one kilometer intervals. Each ground point has a noise index that is calculated by a weight and a sound propagation model for every aircraft trajectory. The proposed method also estimates the time of arrival of each aircraft and adjusts the error from the required time of arrival to zero by making detours or shortcuts from the nominal route. It also considers other aircrafts and avoids confliction during flight by making detours.