Method and apparatus for measuring damping in a workpiece
AssigneeRassini Frenos, S.A. De C.V.
InventorManoj Nelagadde
Life of this patent
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Abstract
A method and apparatus for measuring damping of a work piece are provided. The method includes determining at least one suitable location to measure damping on the work piece, exciting the work piece at the at least one suitable location, measuring a dynamic response of the work piece at the suitable location, and calculating a damping factor and a Q factor from the dynamic response. The apparatus includes a response measurement device configured to obtain response data, such as displacement data and/or velocity data, used in determining the at least one suitable location to measure damping.
Claims21
A method of measuring damping of a work piece comprising:
- determining at least one location to measure damping on the work piece;
- exciting the work piece at the at least one suitable location;
- measuring a dynamic response of the work piece at the suitable location;
- and
- calculating a damping factor and a Q factor from said dynamic response.
A method of measuring damping of a work piece comprising:
- placing a work piece on a support;
- placing a response measuring device proximate work piece;
- exciting the work piece with an excitation device;
- recording a dynamic response of the work piece for a predetermined amount of time;
- extracting a displacement response time history of selected points on a surface of the work piece;
- determining a frequency of selected vibration modes;
- applying a filter on the displacement response time history to extract frequencies and modes used for a damping factor and a Q factor calculation;
- determining nodes and/or anti-nodes of the work piece at selected frequencies;
- exciting the work piece using the excitation device at the nodes and/or anti-nodes;
- recording the dynamic response time history of the work piece at the nodes and/or anti-nodes;
- calculating a damping factor and a Q factor at the nodes and/or anti-nodes.
An apparatus for measuring a damping on a work piece, the apparatus comprising:
- a support surface configured to support the work piece;
- an excitation device configured to excite the work piece;
- a response measuring device positioned proximate to the support surface and configured to capture a dynamic motion response of the work piece;
- and
- a control unit operably connected to the response measuring device and configured to operate the response measuring device and extract data obtained by the response measuring device.
Dependencies are inferred from the claim text.