The invention provides a wind tunnel experiment strut vibration suppression
system and method based on a piezoelectric technology. The
system comprises a
laser displacement sensor, a
data collector, a control calculation module, a
closed loop amplification module and a piezoelectric
actuator. The method comprises the steps that: the
laser displacement sensor collects the normal vibration displacement of a controlled strut; a normal vibration displacement
signal is converted into a normal vibration displacement digital amount through the
data collector; the normal vibration displacement digital amount is used as
feedback control and is sent to the control calculation module; an actuating control
voltage signal is obtained through performing PID control in the control calculation module; the actuating control
voltage signal is amplified to drive the piezoelectric
actuator to generate an actuating force to increase structure damping of the
system, so that the vibration of the strut in the wind tunnel experiment is suppressed, the strut vibration caused by the
impact of a wind tunnel starting impacting load to the model is reduced, the wind tunnel test device and the tested model structure are protected and the
signal to noise ratio of the dynamic wind tunnel experiment data is increased.