Super-altitude propeller device

Abstract

A super-altitude propeller device comprises a multistable compliant mechanism, a semi-flexible airfoil, a flying state sensor and a control system; the multistable compliant mechanism body is configured to respond excitation signal input sent out by the control system to generate mechanism output; a blade element airfoil profile of each propeller blade cross section of a propeller is formed by the semi-flexible airfoil; through self deformability, dynamic adjustment of the aerodynamic force and power of the propeller in a flight process is achieved; flight parameters of a flight vehicle are acquired by the flying state sensor in real time, and are rapidly transmitted to the control system by the flying state sensor; the control system receives data transmitted by the flight state sensor for analysis and calculation and sends out an excitation signal to the multistable compliant mechanism according to an established procedure, and each cross section blade element airfoil profile of the propeller is adjusted, so that a propeller blade aerodynamic shape of the propeller is changed. The super-altitude propeller device is high in efficiency and light in weight, and has better aerodynamic performance in a flight height range of the super-altitude low-speed flight vehicle.

Description

technical field [0001] The invention provides a high-altitude propeller device, which relates to a propeller device suitable for large-span flight of high-altitude and low-speed aircraft, in particular to a propeller which uses a multi-stable compliance mechanism to change propeller pitch and airfoil parameters device. It belongs to the technical field of aviation equipment. Background technique [0002] The cruising altitude of high-altitude and low-speed aircraft is high (20km-30km), and the flight altitude span is large (0km-cruising altitude), and the working environment of the propeller changes greatly. For example, at an altitude of 20km-30km, the air density is 1 / 13 to 1 / 70, kinematic viscosity is 11 to 55 times that of sea level. Therefore, the propeller with fixed pitch and airfoil parameters cannot meet the requirements of the aerodynamic performance of the propeller in the high-altitude atmospheric environment and the low-altitude atmospheric environment at the...

AI Technical Summary

Problems solved by technology

This kind of propeller device combines high and low altitude propeller blades together through a specific mechanism, and has better aerodynamic performance at two specific flight altitudes, but in order to meet the different requirements of high and low altitude propeller blades for torque and speed , the propeller drive motor or engine must be equipped with a transmission device; in addition, when using this propeller, the working space required for the propeller structure change must also be considered

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