Film wing flow-induced vibration piezoelectric energy collection test device

Abstract

The invention discloses a film wing flow-induced vibration piezoelectric energy collection test device, which belongs to the technical field of aeroelastic energy collection and comprises a support, a film wing and a piezoelectric plate. The film wing is installed between the two baffles on the two sides of the support through a wing connecting rotary disc and driven by a rotary shaft disc to achieve adjustable attack angle. Each film wing comprises a front edge shaft, a rear edge shaft, a front metal film and a rear rubber film, and piezoelectric patches are connected to the metal films in series; when the attack angle of the thin film wing is adjusted, firstly, the attack angle of the thin film wing is adjusted; it is adjusted to an attack angle required by the test and then fixing; and then the rubber film is rolled up by rotating the trailing edge shaft, required stress is applied, finally, under the action of airflow, the film wing generates flow-induced vibration, and the piezoelectric plate converts strain energy into electric energy. The service life of the piezoelectric plate can be effectively prolonged; and energy collection in different environments is realized while the aerodynamic performance of the thin film wing is not influenced, and the energy conversion efficiency is 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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