Modeling and Control of Active-Passive Vibration Isolation for Floating Raft System

Table 1

Identified natural frequencies (Hz) and damping factors of the experimental structure choosing and corresponding output RMS error for both the identified system (S) and Kalman filter ().

Method
Input-output data	16.9	0.063	24.6	0.020	45.4	0.010
OKID/ERA	17.0	0.045	24.8	0.017	45.6	0.008	0.0579	0.0452
OKID/ERA-DC	17.0	0.045	24.8	0.017	45.6	0.008	0.0568	0.0403
OKID/DI	20.18	0.246	25.1	0.026	45.7	0.015	0.0826	0.0575
OKID/DP	17.3	0.065	25.0	0.019	45.5	0.007	0.0786	0.0453