Automatic variable-pitch propeller device, control method thereof and aircraft

Abstract

The invention discloses an automatic variable-pitch propeller device, a control method thereof and an aircraft. A variable-pitch driving device is connected with a propeller through a variable-pitch structure, and the pitch of the propeller is adjusted by operating the variable-pitch structure; a tension measuring module is connected with a propulsion system and is used for measuring the dynamic tension of the propulsion system; a variable pitch controller determines real-time propeller efficacy value information according to the dynamic tension and input power, determines a target pitch rangeaccording to the propeller rotating speed and airspeed information, and provides a pitch value in the target pitch range by using an automatic optimization method according to the propeller efficacydata, and the propeller performs variable pitch operation. The device can calculate the propeller efficacy value of the propulsion system in real time, automatically optimizes and matches the optimalpitch based on propeller efficacy, and improves the efficiency of the propulsion system of the aircraft.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to an automatic variable-pitch propeller device, a control method thereof, and an aircraft. Background technique [0002] In the power system of a fixed-wing aircraft, the efficiency of the propeller plays a very critical role in the efficiency of the entire power system. If a fixed-pitch propeller is used, it will face the problem of non-design operating point and low power system efficiency. This is because, under different flight conditions such as flight speed, propeller speed, flight altitude, and ambient temperature, the efficiency of the propeller vary. Traditional fixed-pitch propellers cannot simultaneously maintain high propeller efficiency throughout the flight phase. However, the pitch-variable propeller is often manually changed, which cannot give full play to the advantages of the variable-pitch propeller. [0003] In the field of propeller manned aircraft, the co...

AI Technical Summary

Problems solved by technology

The principle of this method is complex, the processing requirements are high, and it is not easy to realize

[0007] And the automatic variable pitch design proposed by the inventor Wang Wei [A self-variable pitch propeller and aircraft equipped with the device - CN201610384993.6] inventor Bao Jingyun et al [A self-adaptive variable pitch propeller and aircraft - CN201620217092.3], Although the automatic purpose of automatic pitch change can be achieved, starting from the pitch change principle, it is not difficult to find that this type of automatic pitch change is actually an imprecise pitch change, which can only ensure the efficiency of the power system compared with the fixed pitch case comparison

Images