Piezoelectric Energy Harvesting Experimental Device for Flow-Induced Vibration of Film Wing

Abstract

The invention discloses a flow-induced vibration piezoelectric energy collection test device of a film wing, belonging to the technical field of aeroelastic energy collection, comprising a support, a film wing and a piezoelectric sheet; The wing is connected to the turntable to install the membrane wing, and the membrane wing is driven by the rotating shaft plate to realize the adjustable angle of attack. The film wing includes front and rear edge shafts, front metal film and rear rubber film, and piezoelectric sheets are connected in series on the metal film; when adjusting the angle of attack of the film wing: first, adjust the angle of attack of the film wing; adjust to the test It needs to be fixed after the angle of attack; then, the rubber film is rolled up by rotating the trailing edge shaft to apply the required stress. Finally, under the action of the airflow, the film wing produces flow-induced vibration, and the piezoelectric sheet converts the strain energy into electrical energy. The invention can effectively prolong the service life of the piezoelectric sheet; and at the same time ensure that the aerodynamic performance of the thin-film airfoil is not affected, energy collection in different environments can be realized, and the energy conversion efficiency can be ensured.

Description

technical field [0001] The invention relates to a piezoelectric energy collection test device, in particular to a film wing flow-induced vibration piezoelectric energy collection test device, which belongs to the technical field of aeroelastic energy collection. Background technique [0002] Due to the small geometric size and low flight speed of micro-fixed-wing aircraft, its flying Reynolds number belongs to low Reynolds number flow, resulting in a significant decrease in its aerodynamic performance. At the same time, it is prone to stall when encountering gusts of wind, which affects its longitudinal stability. In addition, due to the low load capacity of the micro-aircraft, it is difficult to make a breakthrough in the energy density of the battery in a short time, so that the flight time and flight distance of the micro-aircraft are greatly limited. [0003] The film wing utilizes the great flexibility of the film, and the film vibrates under the action of the airflow,...

AI Technical Summary

Problems solved by technology

[0004] However, there is no device for collecting flow-induced vibration piezoelectric energy by using thin films at present; the existing method is generally to directly paste piezoelectric sheets on the surface of the structure. It is higher than the film wing rubber material, resulting in smaller passive deformation of the structure and a decrease in aerodynamic performance; on the other hand, the piezoelectric sheet will also experience fatigue fracture under repeated large deformation

Therefore, the existing piezoelectric energy harvesting methods have problems such as difficulty in practical engineering applications and affecting the aerodynamic performance of thin-film wings.

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