Compact active vibration control system for a flexible panel

摘要

A diamond-shaped actuator for a flexible panel has an inter-digitated electrode (IDE) and a piezoelectric wafer portion positioned therebetween. The IDE and/or the wafer portion are diamond-shaped. Point sensors are positioned with respect to the actuator and measure vibration. The actuator generates and transmits a cancelling force to the panel in response to an output signal from a controller, which is calculated using a signal describing the vibration. A method for controlling vibration in a flexible panel includes connecting a diamond-shaped actuator to the flexible panel, and then connecting a point sensor to each actuator. Vibration is measured via the point sensor. The controller calculates a proportional output voltage signal from the measured vibration, and transmits the output signal to the actuator to substantially cancel the vibration in proximity to each actuator.

主权项

1. A system for reducing vibration in a flexible panel, the system comprising:
a diamond-shaped actuator having a piezoelectric wafer portion and an inter-digitated electrode (IDE) positioned with respect to the piezoelectric wafer, wherein the diamond-shaped actuator is configured to generate and transmit a force to the flexible panel in response to a proportional output voltage signal; a point sensor positioned with respect to the diamond-shaped actuator, wherein the point sensor is configured for measuring the vibration at a surface of the flexible panel; and
a controller that is electrically connected to the actuator and to the point sensor, wherein the controller receives a vibration signal from the point sensor describing the measured vibration, and is configured for:calculating the proportional output voltage signal using the vibration signal; andtransmitting the proportional output voltage signal to the actuator to substantially cancel the vibration at the surface of the flexible panel.