Bionic flapping wing with wing tip slotted

Abstract

The invention provides a bionic flapping wing with a wing tip slotted. The bionic flapping wing comprises a main beam (7), an inclined beam (8), wing ribs, a film skin (9) and a feather skin (6). A structure main frame of the flapping wing is composed of the main beam (7), the inclined beam (8) and the wing ribs. A frame unit close to a wing root is covered with the film skin (9). A frame unit close to the wing tip is a triangular frame defined by a main beam tip portion section, an inclined beam tip portion section and an nth wing rib root portion section. The outer side, facing the wing tip, of the nth wing rib is covered with multiple bird feathers as the feather skin (6). The front edge of the feather skin (6) is in a sweepback shape, and the rear edge of the feather skin (6) is in a slotted shape. The outer edge of the feather skin (6) and the film skin (9) are in arc transition. The bionic flapping wing with the wing tip slotted has the following beneficial effects that the strength and the direction of a wing tip vortex can be controlled, and the pneumatic efficiency of the flapping wing is improved, so that the flight capacity is improved, the weight is small, and reliability is high.

Description

technical field [0001] The invention relates to a wing, in particular to a bionic flapping wing with slots on the wing tip. Background technique [0002] The flapping wing aircraft is a bionic aircraft that imitates birds or insects in nature and uses flapping wings to fly. It has the characteristics of flexible posture, strong bionicity, and good concealment. It can be used to perform special security, monitoring, reconnaissance, etc. Task. Since the 1990s, research hotspots have been formed internationally, and countries have invested a lot of research. Some representative research results include: "Hummingbird" in the United States, "Seagull" and "Dragonfly" in Germany, and "Dragonfly" in the Netherlands. "Delfly", etc., but there is still a certain gap in performance from practicality, which is mainly reflected in the limited flight time, small payload, and difficult manipulation. One of the main reasons for limiting its performance is the low flight efficiency of exist...

AI Technical Summary

Problems solved by technology

The disadvantage is that the main load-bearing structure of the inner and outer wing sections changes greatly, which is easy to cause structural damage, and the overall span is relatively large, which cannot provide a high flapping frequency

Its disadvantage is that the direction of the wingtip vortex generated at the wingtip is outward and backward, which consumes a lot of energy

The disadvantage is that the weight of the blades and the mechanism is very large, the demand for input power is large, the opening and closing movement needs precise coordination, and the control is difficult

The disadvantage is that there is no transition in the folding part, which destroys the continuity of aerodynamic performance, and the weight of the components is large, the power consumption is large, and the reliability is poor.

[0009] It can be seen that the various flapping wings that have been disclosed so far have problems such as low aerodynamic efficiency, heavy component weight, and insufficient reliability.

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