| Popis: |
One proposed method to suppress vibrations of a mechanical structure is to couple the energy of vibration to an external electric shunt circuit. Coupling of the mechanical energy to the electric circuit is accomplished with a piezoelectric transducer attached to the structure. Significant amounts of mechanical energy can be dissipated by the shunt, but a large inductor is required. In this presentation, we describe an alternative approach that replaces the shunt with a linear passive electric circuit that is connected to another piezoelectric transducer attached to the structure. Even though the electric circuit does not contain an inductor, it is still possible to dissipate significant amounts of mechanical energy in the connecting circuit. The mechanism of energy dissipation in the electric circuit is similar to, but not identical to, that exploited by a tuned electric shunt. Inductance, however, is provided by mutual coupling of piezoelectric transducers on the structure. |
