Function Gradient Structure Aeroelastic Energy Harvester

The advancement of science and technology have made outstanding contributions for our country aerospace domain,independent research and development in our country to the rising number of types of aircraft,can achieve speed accelerating,design a harvester used to collect aircraft under the supersonic pneumatic spring and the vibration energy of thermal environment,will be collected by the energy to supply aircraft sensors such as equipment for recycling.In this paper,the structure of the aircraft is simplified as a simple beam model of composite material with functional gradient,and a new multifunctional composite functional gradient structure is proposed by selecting a new film as the energy acquisition device,which can realize vibration energy conversion,namely acquisition.This article selects piezoelectric thin film,giant magnetostrictive thin film and the two thin film composite energy harvesting methods,with reference to the geometric large deformation theory of constitutive equation and the film itself,the piston theory is established to simulate respectively using Hamilton's principle supersonic pneumatic pressure and the structure of the thermal environment of the whole machine-electricity coupling dynamic equations and machine-magnetic coupling dynamic equation,by using runge-kutta algorithm to simulate the energy collection effect.Because structure by supersonic pneumatic pressure,so must the flutter problem of the beam,according to the dimensionless pneumatic pressure to calculate flutter point,discuss Liang Chao function within the critical flutter velocity gradient magnetic thin film energy collector,geometric structure parameters and slenderness ratio and gradient index,the coil number of turns,external resistance and external factors such as air velocity and temperature of maximum voltage output and energy acquisition,and calculate the optimal solution.Results show that this new type of multifunctional function gradient composite structure can achieve the ideal of energy collection efficiency,the appropriate parameters can improve the effect of energy collection,can solve the difficulties and challenges facing the vibrational energy collector,is the new trend of energy harvesting,if can put into practice,the important research results will become the new direction for the energy harvesting technology worldwide,and it is of great significance to the development of the energy field.