Adaptive Robust Sliding Mode Vibration Control of a Flexible Beam Using Piezoceramic Sensor and Actuator: An Experimental Study

Table 3

PSD drop comparison of first 5 seconds and last 5 seconds.

	Mode 1	Mode 2	Mode 3
dB level of the first 5 seconds	16.73	5.98	−14.36
dB level of the last 5 seconds	2.91	−17.23	−35.19
dB drop	13.82	23.21	20.83