Hybrid Rotational Passive Energy Absorber
AssigneeMassachusetts Institute of Technology
InventorMaor Farid
Life of this patent
Estimating the term…
Abstract
A hybrid rotational passive energy absorber (100) is configured to mitigate effects of a load on an attached system. An axle (170) is anchored to a housing (110) at a first axle end and a second axle end. A free swinging weighted arm (180) includes a beam (130) having a length L, a pivot portion (185) disposed at a first end of the beam, and an internal mass (120) at a second end of the beam. A bearing (160) rotatably connects the pivot portion to the axle. The bearing is configured to provide smooth motion of the weighted arm around an axis (150) of the axle in a rotation and/or oscillation plane orthogonal to the axis.
Claims9
A hybrid rotational passive energy absorber (100) configured to mitigate effects of a load on an attached system, comprising:
- a housing (110);
- an axle (170) anchored to the housing at a first axle end and a second axle end;
- a free swinging weighted arm (180) comprising a beam (130) having a length L, a pivot portion (185) disposed at a first end of the beam, and an internal mass (120) at a second end of the beam;
- and
- a bearing (160) configured to rotatably connect the pivot portion to the axle,
- wherein the bearing is configured to provide smooth motion of the weighted arm around an axis (150) of the axle in a plane of rotation and/or oscillation orthogonal to the axis, and the weighted arm is configured to passively adapt to respond to a first energy excitation with a full rotation around the axle and to respond to a second energy excitation smaller than the first energy excitation with an oscillation of less than a full rotation around the axle.
A method for mitigating vibration in a system having a first mass, comprising the steps of:
- providing a hybrid rotational passive energy absorber (100), further comprising the steps of:
- a housing (110);
- anchoring an axle (170) to the housing at a first axle end and a second axle end;
- providing a free swinging weighted arm (180) comprising a beam (130) having a length L, a pivot portion (185) disposed at a first end of the beam, and an internal mass (120) at a second end of the beam;
- and
- attaching a bearing to the axle;
- attaching the pivot portion to the bearing (160) to rotatably connect the pivot portion to the axle,
- wherein the bearing is configured to provide smooth motion of the weighted arm around an axis (150) of the axle in a plane of rotation and/or oscillation orthogonal to the axis, and the weighted arm is configured to passively adapt to respond to a first energy excitation with a full rotation around the axle and to respond to a second energy excitation smaller than the first energy excitation with an oscillation of less than a full rotation around the axle.
Dependencies are inferred from the claim text.