Skin flutter excitation type piezoelectric energy harvester of micro-miniature wing

Abstract

The invention discloses a skin flutter excitation type piezoelectric energy harvester of a micro-miniature wing, and belongs to the technical field of air flow induced vibration energy harvesters. Theinvention aims to solve the problems that an existing flutter piezoelectric energy harvester is difficult to apply and popularize in engineering and complex in structure. A front stringer, a rear stringer and two elastic shafts are adjustably arranged between two wing ribs. Through changing the distance between the wing ribs and the relative positions between the front stringer and the rear stringer, the effective working length of the skin in the spanwise direction and the chordwise direction is adjusted. The skin is coated on a wing framework. At least four piezoelectric patches are mountedin the skin and are symmetrically arranged up and down. The skin is driven by the air flow to generate the aerodynamic elastic vibration, so that the piezoelectric patches are excited to output voltage. Elastic shafts for adjustably mounting the wings are arranged on the fixed supports and are used for adjusting the windward angles of the wings. The skin flutter excitation type piezoelectric energy harvester of the wing can adjust the effective working length of the skin of the energy harvester and the windward angle of the wing, so that the energy harvesting performance and the energy harvesting efficiency are greatly improved.

Description

technical field [0001] The invention relates to a piezoelectric energy harvester, in particular to a skin flutter-excited piezoelectric energy harvester for a miniature wing, which belongs to the technical field of air flow-induced vibration energy harvesting. Background technique [0002] When a micro-rotor or fixed-wing aircraft is cruising and encountering gusts, its wing skin is susceptible to aeroelastic vibration. When the flight speed exceeds or approaches the critical flutter speed, the skin flutters. On the one hand, it can use the aeroelastic vibration of the skin of the wing to capture energy and supply power to micro-electromechanical systems such as wireless sensors; flight stability and control precision. [0003] Most of the flow-induced vibration energy harvesting in the prior art is a single energy harvester or double energy harvester in which a bluff body is connected to a piezoelectric cantilever beam. It rarely involves the piezoelectric energy harvest...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a skin flutter-excited piezoelectric energy harvester for a micro-miniature wing, to solve the problem that the flutter piezoelectric energy harvester cannot be applied to micro-aircraft for energy harvesting, and it is difficult to popularize and apply it in practical engineering. , affecting flight stability, and complex structures

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