Systems and methods for adaptive flexural wave absorber
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsXiaopeng Li, Taehwa Lee, Hideo Iizuka
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Abstract
A flexural wave absorption system includes a base member connected to a beam that may be subject to flexural waves, an arm member, connected to the base, disposed substantially in parallel alignment with the beam, a mass member connected to a distal end of the arm member, a piezoelectric patch, connected to the arm member, that generates electricity in response to a flexural wave propagating through the beam, and a shunting circuit, connected to the piezoelectric patch, that dissipates electricity generated by the piezoelectric patch to absorb the flexural wave.
Claims20
A flexural wave absorption system, comprising:
- a base member connected to a beam that may be subject to flexural waves;
- an arm member, connected to the base, disposed substantially in parallel alignment with the beam;
- a mass member connected to a distal end of the arm member;
- a piezoelectric patch, connected to the arm member, and configured to generate electricity in response to a flexural wave propagating through the beam;
- and
- a shunting circuit that includes a reactance device adjustable based on a frequency of the flexure wave, is connected to the piezoelectric patch, and is configured to provide a voltage at an opposite phase of the electricity generated by the piezoelectric patch to absorb the flexural wave.
A method of absorbing a flexural wave, comprising:
- detecting a flexural wave propagating through a beam;
- generating electricity, in response to the flexural wave, via a piezoelectric patch connected to an arm member that is in mechanical communication with the beam;
- and
- providing, via a shunting circuit that includes a reactance device adjustable based on a frequency of the flexure wave and is in electrical communication with the piezoelectric patch, a voltage at an opposite phase of the electricity generated by the piezoelectric patch.
A flexural wave absorption system, comprising:
- a piezoelectric stack that:
- 1) is directly connected to a beam that may be subject to flexural waves, 2) is coated with a damping material, and 3) is configured to generate electricity in response to a flexural wave propagating through the beam;
- a mass member connected to the piezoelectric stack;
- and
- a shunting circuit that includes a reactance device adjustable based on a frequency of the flexure wave, is connected to the piezoelectric stack, and is configured to provide a voltage at an opposite phase of the electricity generated by the piezoelectric stack to absorb the flexural wave.
Dependencies are inferred from the claim text.