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Title: Electromagnetic variable degrees of freedom actuator systems and methods

Abstract

The present invention provides a variable reluctance actuator system and method that can be adapted for simultaneous rotation and translation of a moving element by applying a normal-direction magnetic flux on the moving element. In a beneficial example arrangement, the moving element includes a swing arm that carries a cutting tool at a set radius from an axis of rotation so as to produce a rotary fast tool servo that provides a tool motion in a direction substantially parallel to the surface-normal of a workpiece at the point of contact between the cutting tool and workpiece. An actuator rotates a swing arm such that a cutting tool moves toward and away from a mounted rotating workpiece in a controlled manner in order to machine the workpiece. Position sensors provide rotation and displacement information for a swing arm to a control system. A control system commands and coordinates motion of the fast tool servo with the motion of a spindle, rotating table, cross-feed slide, and in feed slide of a precision lathe.

Inventors:
 [1];  [2]
  1. Pleasanton, CA
  2. Plaistow, NH
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
960207
Patent Number(s):
7,492,117
Application Number:
11/490,988
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Montesanti, Richard C, Trumper, David L, and Kirtley, Jr., James L. Electromagnetic variable degrees of freedom actuator systems and methods. United States: N. p., 2009. Web.
Montesanti, Richard C, Trumper, David L, & Kirtley, Jr., James L. Electromagnetic variable degrees of freedom actuator systems and methods. United States.
Montesanti, Richard C, Trumper, David L, and Kirtley, Jr., James L. Tue . "Electromagnetic variable degrees of freedom actuator systems and methods". United States. https://www.osti.gov/servlets/purl/960207.
@article{osti_960207,
title = {Electromagnetic variable degrees of freedom actuator systems and methods},
author = {Montesanti, Richard C and Trumper, David L and Kirtley, Jr., James L.},
abstractNote = {The present invention provides a variable reluctance actuator system and method that can be adapted for simultaneous rotation and translation of a moving element by applying a normal-direction magnetic flux on the moving element. In a beneficial example arrangement, the moving element includes a swing arm that carries a cutting tool at a set radius from an axis of rotation so as to produce a rotary fast tool servo that provides a tool motion in a direction substantially parallel to the surface-normal of a workpiece at the point of contact between the cutting tool and workpiece. An actuator rotates a swing arm such that a cutting tool moves toward and away from a mounted rotating workpiece in a controlled manner in order to machine the workpiece. Position sensors provide rotation and displacement information for a swing arm to a control system. A control system commands and coordinates motion of the fast tool servo with the motion of a spindle, rotating table, cross-feed slide, and in feed slide of a precision lathe.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {2}
}

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