Patent · US Expired

Method and device for avoiding a collision of a rotating rotor blade of a rotary-wing aircraft with blade vortex

US6749152B2 · kind B2 · utility

1Cited by

6References

10Claims

0Family size

Assignee

Eurocopter Deutschland GmbH · DE

Inventors

Marius Bebesel · Augsburg, DE
Reinhard Pongratz · Taufkirchen, DE
Dieter Roth · Schlüchtern, DE

Key dates

Filing date	Sep 9, 2002
Grant date	Jun 15, 2004
Priority date	—
Expiry date	Sep 9, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T50/30
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method for avoiding a collision of a rotating rotor blade of a rotary-wing aircraft with a blade vortex, and a device for executing the method. An aerodynamic parameter of the rotor blade of a rotary-wing aircraft is controlled, (for example, variation of the angle of incidence of the blade or profile variation of the blade), using a signal processing device that includes at least one open-loop and/or closed-loop control device, in such a way that a collision of the rotor blade with blade vortices becomes avoidable. The frequency content from the signal of the sound-pressure sensors is rapidly and precisely found. The harmonics are progressively adapted. A lesser calculation requirement per step and increase accuracy, as compared with an FFT analysis, is provided.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.