Insect-scale flapping-wing micro aerial vehicle actuated by piezoelectricity

Abstract

The invention provides an insect-scale flapping-wing micro aerial vehicle actuated by piezoelectricity. The insect-scale flapping-wing micro aerial vehicle comprises a piezoelectric actuator, an aerial vehicle body, a transmission mechanism, two wings, two driven twisting hinges and auxiliary structures, wherein the aerial vehicle body and the transmission mechanism are integrally formed; the piezoelectric actuator generates cyclical reciprocating vibration under the situation of electrifying; the transmission mechanism is used for amplifying the micro vibration of the piezoelectric actuator and converting the amplified vibration into the flapping motion of the two wings; and each of the root parts of the two wings is connected with the corresponding driven twisting hinge, under the effect of aerodynamic force and inertial force, the two wings are twisted, so that lifting force required by flying is generated. According to the insect-scale flapping-wing micro aerial vehicle actuated by piezoelectricity disclosed by the invention, the size and the weight of the micro aerial vehicle are in an insect scale; the transmission mechanism with amplified flexible hinges is designed between the piezoelectric actuator and the wings, and is matched with the piezoelectric actuator, so that high-frequency wide-range reciprocating flapping motion of the wings can be realized; and the transmission mechanism and the aerial vehicle body are integrally designed, so that assembly of the transmission mechanism and the aerial vehicle body is avoided, and the assembling accuracy is greatly improved.

Description

technical field [0001] The invention relates to the technical field of micromachining, in particular to an insect-scale piezoelectric-driven flapping-wing micro-aircraft. Background technique [0002] The flapping-wing micro-aircraft is a micro-aircraft that relies on complex movements of wings to achieve flight. On a large scale, it is generally driven by a motor, and a rigid connecting rod or a gearbox is used as a transmission device to convert the rotational motion of the motor into the reciprocating flapping motion of the wings. However, as the scale shrinks, the influence of surface forces will become more significant relative to body forces, and the motor drive method is very cumbersome and inefficient. The transmission methods such as "shafts" and "gears" in traditional mechanical structures are inefficient. Processing is difficult. At the insect scale, it is difficult to further reduce the size and weight of the power transfer motor to realize the real "insect sca...

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Problems solved by technology

Although this design method can realize the scale of insects, the deformation of piezoelectric ceramics is very small. Without the help of the amplification mechanism, the flapping motion of the wings will be very small, which is not conducive to the generation of lift force; and the aircraft with the publication number 102815399A Similarly, the wings of this aircraft cannot produce effective torsional motion, which is not conducive to the generation of lift

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