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Linear dc motor vibration controller

  • US 4,897,582 A
  • Filed: 01/06/1987
  • Issued: 01/30/1990
  • Est. Priority Date: 01/06/1987
  • Status: Expired due to Term
First Claim
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1. For use with a structure that is subject to vibrational movement, a system for imparting a controlled dampening force to said structure so as to counter said vibrational movement comprising:

  • a moveable mass to be translated in an oscillatory movement with respect to said structure and thereby impart to said structure a vibrational movement-compensating force against which said structure reacts, so that the vibrational movement thereof may be effectively countered by the controlled movement of said mass; and

    first means, mechanically attached to said structure at a location whereat said vibrational movement may occur, for providing a rectilinear travel path for said mass to be translated there along in an oscillatory manner and for imparting a controlled force to said mass so as to cause said mass to oscillate along said rectilinear travel path; and

    whereinone of said movable mass and said first means comprises a winding of an electric motor and the other of said mass and said means comprises a linear magnetic field responsive element, magnetically interacting with said winding of said electric motor, so that said winding may impart a force to said element, and whereinthe oscillatory translation of said movable mass is controlled exclusively by controlled magnetic field interaction between said winding and said linear magnetic field responsive element.

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