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Harmonic force generator for an active vibration control system

  • US 7,958,801 B2
  • Filed: 10/01/2003
  • Issued: 06/14/2011
  • Est. Priority Date: 10/01/2003
  • Status: Active Grant
First Claim
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1. A force generator comprising:

  • a rotationally fixed first circular member defined about a first axis to define a first inner diameter circular path, said first circular member having a first radius;

    a second circular member defined about a second axis offset from said first axis to define a second radius;

    a crank which mounts said second circular member, said crank rotatable about said first axis;

    a mass located adjacent a circumference of said second circular member movable about a two-cusp hypocycloid path to generate a vibratory inertial force;

    a processor;

    a sensor system in communication with said processor; and

    a power source which drives said crank, said processor controls said power source to drive said crank such that a phase and magnitude of the vibratory inertial force is continuously varied to reduce an externally generated vibratory force sensed by said sensor system.

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