Phase synchronization control noise reduction test platform based on small propeller fixed-wing UAV

Abstract

The invention relates to a synchrophaser noise reduction test platform based on a fixed-wing unmanned aerial vehicle (UAV) with small-sized propellers. The synchrophaser noise reduction test platform comprises the fixed-wing UAV with the small-sized propellers, power systems, airborne equipment and a ground console, wherein the power systems comprise propellers driven by battery-powered brushless DC electric motors; the airborne equipment comprises a main controller, a synchrophaser control module, a wireless communication module, a noise acquisition module and phase angle measurement sensors; the main controller is in charge of flight attitude and speed control and sends a rotational speed command generated by flight control and a desired synchronization phase angle command to the synchrophaser control module; the synchrophaser control module controls the rotational speed and phase angle of the brushless DC electric motors according to the rotational speed command and the synchronization phase angle command sent by the main controller, controls the propellers to be at a specified rotational speed, and keeps the phase angle difference between the propellers to a command value; and the wireless communication module is used for data transmission between the main controller and the ground console. The synchrophaser noise reduction test platform based on the fixed-wing UAV with the small-sized propellers has the advantages of being not prone to be affected by flight fields, convenient for testing, and low in cost.

Description

technical field [0001] The invention relates to a phase synchronization control noise reduction test platform based on a small propeller fixed-wing unmanned aerial vehicle, belonging to the technical field of propeller noise control. Background technique [0002] The air disturbance area of ​​the turboprop aircraft is large, and the Mach number of the blade tip is high, which brings relatively large vibration and noise. The noise level inside the cabin is 85~105dB. Preliminary estimates suggest that the noise of a turboprop aircraft at a frequency of 100-250 Hz needs to be reduced by 25dB to reach the level of an equivalent turbofan aircraft. The phase-synchronous control method of turboprop aircraft reduces noise. The principle is to maintain a certain phase angle difference between several propellers of a multi-propeller aircraft, so that part of the noise and vibration generated by each propeller cancels each other out to minimize the noise in the cabin. Compared with pa...

AI Technical Summary

Problems solved by technology

It aims to solve the problems of high cost, difficulty and limited space in the simultaneous control noise reduction test on large turboprop aircraft and military turboprop aircraft

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