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A tunable airfoil flutter-excited two-element piezoelectric energy harvester

A piezoelectric energy harvesting and dual vibrator technology, which is applied to piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problems of low energy harvesting efficiency and complex structure, Achieve high energy capture efficiency, large output energy, and good operability

Active Publication Date: 2020-10-02
HARBIN INST OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tunable airfoil flutter-excited dual vibrator piezoelectric energy harvester to solve the problem that the existing flutter piezoelectric energy harvesters rarely involve the wing as a bluff body piezoelectric energy harvester. Energy devices, low energy harvesting efficiency, and complex structures

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  • A tunable airfoil flutter-excited two-element piezoelectric energy harvester
  • A tunable airfoil flutter-excited two-element piezoelectric energy harvester
  • A tunable airfoil flutter-excited two-element piezoelectric energy harvester

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Embodiment Construction

[0024] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Such as Figure 1 to Figure 7 As shown, a tunable airfoil flutter-excited dual vibrator piezoelectric energy harvester described in the present invention includes a fixed support base, a piezoelectric vibrator 2, a bracket group 3, an elastic shaft 4, a wing 5 and a torsion spring Bracket 6;

[0026] At least two piezoelectric vibrators 2 are fixedly installed on the fixed support base, and the piezoelectric vibrators 2 are arranged oppositely, one end of the piezoelectric vibrator 2 is connected to the fixed support base, and the other end of the piezoelectric vibrator 2 is equipped with a bracket group 3, Elastic shaft 4 is installed between adjacent two support groups 3, and the windward side of wing 5 is fixedly installed on elastic shaft 4, and torsion spring support 6 is all installed on support group 3, and the elastic end of tor...

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Abstract

A tunable wing-type flutter excitation-type dual-oscillator piezoelectric energy harvester belongs to the technical field of air flow-induced vibration energy harvesting. In order to solve the problems that an existing flutter piezoelectric energy harvester hardly involves a piezoelectric energy harvester taking wing as a fluid, the energy harvesting efficiency is low and the structure is complicated, at least two piezoelectric oscillators are fixedly arranged on a fixed support base and are arranged oppositely, one end of each piezoelectric oscillator is connected with the fixed support base,support groups are arranged at the other ends of the piezoelectric oscillators, an elastic shaft is arranged between two adjacent support groups, a windward side of the wind is fixedly arranged on the elastic shaft, a torsional spring supports are arranged on the support groups, and elastic ends of the torsional spring supports are connected with the elastic shaft by torsional springs. By the tunable wing-type flutter excitation-type dual-oscillator piezoelectric energy harvester, the working length of a plate spring of the energy harvester, the working lengths of the torsional springs and the windward angle of the wing can be conveniently adjusted, so that the energy harvesting efficiency and performance of the energy harvester are greatly improved.

Description

technical field [0001] The invention relates to a piezoelectric energy harvester, in particular to a tuneable airfoil flutter-excited dual vibrator piezoelectric energy harvester, which belongs to the technical field of air flow-induced vibration energy harvesting. Background technique [0002] When a micro fixed-wing aircraft is cruising normally and encountering gusts, the wings are subjected to aeroelastic vibration. When the flight speed exceeds or approaches the critical flutter speed, the wing is prone to flutter, resulting in bifurcation phenomena such as limit cycle oscillation, quasi-periodic and chaotic motion. Since flutter is a self-excited large-amplitude unstable vibration, on the one hand, aeroelastic vibration can be used to capture energy to supply power for micro-electromechanical systems such as wireless sensors; on the other hand, energy-harvesting characteristics can also be used to affect the response characteristics of aeroelastic vibration , to suppr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
Inventor 单小彪田海港谢涛
Owner HARBIN INST OF TECH
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