VIBRATION DAMPING DEVICES WITH ACTIVE CONTROL AND COMPRISING MOVABLE WEIGHTS EXCITED BY ELECTROMAGNETS ALONG 2 OR 3 AXES

摘要

The device dampens the vibrations along the 3 space axes and is usable at normal temperatures. It comprises 2 weights (49 and 50) (figure 10) suspended by a flexible rod (48) what is itself suspended by 2 elastic suspensions (57 and 58). An electrodynamic motor comprised of 2 electromagnets acting along the axis YY', 2 electromagnets acting along the axis ZZ' and 8 electromagnets acting along the axis XX' servo-controlled to the vibration to be dampened, generates a motion of the 2 weights (49 and 50) along 3 orthogonal axes opposite to the vibrations to be dampened. A simple arrangement comprises 2 weights with planar motion and arranged at the extremity of 2 flexible structures interconnected by a cylindrical plate. An electrodynamic motor comprised of 2 or 4 orthogonally acting electromagnets, and servo-controlled to the vibrations to be dampened, generates a motion of the 2 weights which is opposite to the vibrations to be dampened and along 2 orthogonal axes.