| 摘要 |
<p>#CMT# #/CMT# The device has a membrane in the form of a disk suspended on a support (4), and two piezoelectric actuators (6, 10) in contact with the membrane for exerting a force on the membrane. A position determining unit determines the position of the membrane relative to the support, and a control unit controls the actuators. The control unit applies a deformation signal to one of the actuators, so as to move the membrane, and applies a control signal to the other actuator to control the movement of the membrane, where the control signal is applied based on the position of the membrane. #CMT# : #/CMT# The position determining unit is of capacitive type or piezoelectric type or piezoresistive type. An independent claim is also included for a method for controlling the operation of a membrane device. #CMT#USE : #/CMT# Membrane device for a digital loudspeaker (claimed). #CMT#ADVANTAGE : #/CMT# The control unit applies the deformation signal to one of the actuators, so as to move the membrane, and applies the control signal to the other actuator to control the movement of the membrane based on the position of the membrane, thus enabling dynamic movement of the membrane to be controlled. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional view of a membrane device. 4 : Support 6, 10 : Piezoelectric actuators 8 : Voltage source.</p> |
