Effects of Interaction between Dual Shaking Tables and Specimen and Force Feedback Compensation Control

Table 1

Characteristic parameters of dual electrohydraulic servo-shaking tables.

Designation	Parameter
Table size	3 m × 3 m
Table mass	6000 kg
Maximum load	10000 kg
Frequency range	0.4 Hz∼50 Hz
Natural frequency of sensor	150 Hz
Damping ratio of sensor	0.7
	0.011 m^2
	7 × 10^8 N/m^2
	2.662 × 10^−3 m^3
	2.5 × 10^−11 m^5/(N·s)
Natural frequency of servo-valve	100 Hz
Damping ratio of servo-valve	0.7