A three-degree-of-freedom flapping wing test rig based on gear transmission

Abstract

The invention discloses a three-degree-of-freedom flapping wing experimental platform based on gear transmission, which comprises a frame, a flapping mechanism, a sweeping mechanism, a torsion mechanism and a flapping wing. The flapping mechanism comprises a flapping motor, a flapping shaft and a flapping wing first fixing frame. The flapping motor is fixed on the frame; The flapping shaft is articulated and installed on the rack, and is vertically arranged with the rack notch; A first fixing frame of the flapping wing is rectangular in block shape, and a flapping shaft accommodating hole is arranged in the middle of the first fixing frame; A flutter shaft is arranged in the flutter shaft accommodating hole, and the flutter shaft and the flapping wing first fixing frame are fixedly connected with each other; A sweep mechanism is mounted on that first fix bracket of the flapping wing; The torsion mechanism is hingedly mounted on the first hinge hole of the sweeping mechanism; The flapping wing is fixedly mounted on the torsional driven bevel gear and is coaxially arranged with the first hinge hole. The mechanism is compact in structure, accurate in transmission and high in efficiency. The motor arrangement reduces torque and motion inertia. Motor speed and displacement are controlled by software to realize three-degree-of-freedom parameter adjustability, and arbitrary preset trajectory can be generated.

Description

technical field [0001] The invention belongs to the technical field of flapping-wing aircraft experimental equipment, and in particular relates to a three-degree-of-freedom flapping-wing experimental platform based on gear transmission. Background technique [0002] Studies have shown that the high aerodynamic efficiency of birds and insects in nature is mainly due to the fact that in the flapping process, the flapping wings have forward and backward sweeping motions and torsional motions around the span of the wings in addition to flapping up and down. This form of compound movement enables birds and insects to take advantage of Clap-Fling, Delayed Stall, Rotational Circulation and Wake Capture "Four high-lift mechanisms achieve the highest aerodynamic efficiency. Among the four high-lift mechanisms, "flying" and "delayed speed" are the inherent lift mechanisms of the flapping wing, while "rotating circulation" and "wake capture" are the effects of the flapping wing's rota...

AI Technical Summary

Problems solved by technology

However, there are still some problems in the flapping wing experimental research: 1. It is difficult to accurately realize the preset flapping law due to mechanical errors and soft connection transmission in the complex flapping process of the flapping wing drive mechanism; 2. The flapping wing drive mechanism is complicated. , it is difficult to arrange the corresponding sensors for measurement according to the measurement requirements

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