Method for determining lifting force and resistance moment of spiral wing

Abstract

The invention relates to a method for determining lifting force and resistance moment of a spiral wing. According to the method, firstly, a laser three-dimensional imaging method based on a cooperative target is utilized for scanning to obtain three-dimensional point cloud of the spiral wing, and then, the feature of centrosymmetry of the spiral wing is utilized for analyzing one blade. Firstly, the blade is divided into n equal parts, next, the geometric feature of each part is extracted, in addition, the lifting force coefficient and the resistance coefficient are calculated, then, the lifting force coefficients of each part are superimposed, the resistance coefficients are superimposed, and the lifting force coefficient and the resistance coefficient of the spiral wing are obtained. Finally, the lifting force coefficient and the resistance coefficient are substituted into a spiral wing lifting force and angular velocity relational expression deduced according to an air resistance model and a received resistance moment and angular velocity relational expression of the spiral wing, and the lifting force and resistance moment of a spiral wing can be determined. The method has the advantages that the spiral wings in any shapes can be scanned, in addition, the lifting force and angular velocity relationship and the resistance moment and angular velocity relationship of the spiral wing is given, and wide applicability is realized.

Description

technical field [0001] The invention relates to a method for determining lift force and resistance moment of a helical wing, and belongs to the technical field of aircraft control. Background technique [0002] Rotorcraft, such as large helicopters and small quadrotor drones, are a type of aircraft. The rotor is the main propulsion device. In some cases where the geographical environment is complex, the space is small, and a certain area needs to be continuously concerned, the rotorcraft is undoubtedly the most suitable choice. In terms of unmanned aerial vehicles, the rotorcraft can be miniaturized, so that it has the advantages of flexible maneuverability, good concealment, easy operation, flexible configuration, and wider operating range. For example, it can be used for reconnaissance and individual combat in the military; some large-scale monitoring, such as pipeline patrol, farmland disease and pest monitoring, and small rotor drones can complete tasks more efficiently...

AI Technical Summary

Problems solved by technology

The magnitude of its force is proportional to the rotational speed, and the shape of the spiral wing has a direct impact on its lift, but the shape of the spiral wing is not fixed, so it is very difficult to establish a unified mathematical model

At present, most of the rotorcraft control adopts the method of fuzzy control. This method is simple in modeling, but has a large amount of calculation. In the application of small unmanned aerial vehicles (such as quadrotor aircraft), wireless data transmission must be carried out Human-machine control, which limits the range of motion of the aircraft and also limits its use

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