公开(公告)号：US10562617B2

公开(公告)日：2020-02-18

申请号：US15350073

申请日：2016-11-13

Applicant: Bell Helicopter Textron, Inc.

Inventor： Jouyoung Jason Choi ,  David Heverly ,  Michael Seifert ,  Michael Smith ,  Frank Brad Stamps ,  Thomas Parham, Jr. ,  Amarjit Olenchery Kizhakkepat

IPC: B64C27/00 ,  B64C29/00

Abstract: A vibration attenuation system for attenuating vibrations in a mast of an aircraft includes a weight attached to the mast but free to orbit about the mast. The weight can be comprised of one or more weight assemblies. Embodiments can include a single weight, or plural weight assemblies wherein each weight assembly can include a mechanical interconnecting mechanism so that each weight assembly receives feedback regarding the position and movement of one or more other weight assemblies. Each weight can be associated with a spring that urges the weight towards a neutral position. Rotation of the mast can cause the weight to orbit about the mast and self-excite such that the weight acts against the urging of the spring towards an attenuating position.

公开(公告)号：US11084575B2

公开(公告)日：2021-08-10

申请号：US16084970

申请日：2017-03-14

Applicant: Bell Helicopter Textron, Inc.

Inventor： Jouyoung Jason Choi ,  David Heverly ,  Michael Seifert ,  Michael Smith ,  Frank Bradley Stamps ,  Thomas Parham, Jr. ,  Amarjit Olenchery Kizhakkepat

IPC: B64C27/00 ,  F16F7/116 ,  F16F15/14

Abstract: A vibration attenuation system for attenuating vibrations in a mast of an aircraft includes a weight attached to the mast but free to orbit about the mast. The weight can be comprised of one or more weight assemblies. Embodiments can include a single weight, or plural weight assemblies wherein each weight assembly can include a mechanical interconnecting mechanism so that each weight assembly receives feedback regarding the position and movement of one or more other weight assemblies. Each weight can be associated with a spring that urges the weight towards a neutral position. Rotation of the mast can cause the weight to orbit about the mast and self-excite such that the weight acts against the urging of the spring towards an attenuating position.