Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Systems and methods for reducing the propeller noise

A technology of propeller and noise characteristics, which is applied in the field of propeller noise system and can solve problems such as easy noise generation

Pending Publication Date: 2019-10-01
AURORA FLIGHT SCI CORP
View PDF16 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such aircraft are prone to noise, the main source of which is the rotors / rotors themselves

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Systems and methods for reducing the propeller noise
  • Systems and methods for reducing the propeller noise
  • Systems and methods for reducing the propeller noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present embodiments. For example, the dimensions of elements may be exaggerated for clarity and convenience of description. Also, wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like elements of the embodiments. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the embodiment. In the following description, it should be understood that terms such as "first", "second", "top", "bottom", "side", "front", "rear" and the like are for convenienc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The application relates to systems and methods for reducing the propeller noise. Disclosed is an aerial vehicle having a reduced noise signature. The aerial vehicle may be a vertical take-off and landing (VTOL) aerial vehicle. The aerial vehicle comprises an airframe and a plurality of rotors operatively coupled with one or more motors. The plurality of rotors may comprise a first, second, third,and fourth rotor. Each of the first, second, third, and fourth rotors may be arranged in a single plane and oriented to direct thrust downward relative to the airframe. In certain aspects, at least two of the plurality of rotors employ a different geometry to generate a targeted noise signature.

Description

technical field [0001] The present invention relates to a system and method for controlling acoustic radiation in an aircraft, and more particularly, to a system and method for reducing propeller noise in a rotorcraft. Background technique [0002] All-electric and hybrid-electric aircraft, often driven by multiple rotors / propellers, have become increasingly popular over the past decade. However, such aircraft are prone to noise, the main source of which is the rotors / rotors themselves. [0003] There are many existing strategies for reducing propeller noise, most of which are directed at the rotor blade design itself. Noise generated by rotors can be roughly divided into two main types of noise—broadband noise and periodic noise. Broadband noise includes eddy noise and turbulence-induced noise, while periodic noise includes rotational noise and interaction / distortion effects. Tonal noise is largely determined by the number of propeller blades and the revolutions per minu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B64C27/32B64C27/46B64C27/12B64C27/08G10L21/0208G10L21/0216
CPCB64C27/32B64C27/46B64C27/12G10L21/0208G10L21/0216B64U50/14B64U50/12B64U10/14B64U20/20B64U10/16B64U50/19B64C11/18B64C2220/00B64C27/24B64D31/06Y02T50/60B64U2201/00B64C27/08B64C27/473G10K11/178B64C27/14B64U10/10B64U10/13B64U30/20
Inventor A·考夫曼R·C·格里芬K·尤勒克M·K·费斯彻J·D·帕杜阿诺
Owner AURORA FLIGHT SCI CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com