Research Article
An Ultra-Low Frequency Two DOFs’ Vibration Isolator Using Positive and Negative Stiffness in Parallel
Figure 9
The simulation curves, (a) the relationship between stiffness of the PS air spring and the initial volume of the air chamber under different payload mass ( = 1000, 2000, and 3000 kg), (b) the stiffness of the NS magnetic spring with the following magnet parameters: the upper/lower 35 mm × 14 mm × 7 mm, the middle 30 mm × 10 mm × 10 mm, , a relative permeability , equal to 1.023, (c) the relationship between stiffness of the PS flat spring and the effective bending length of the flat spring, with the bending section moment of inertia ( kg⋅m2) being constant, and (d) the relationship between stiffness of the NS inverted pendulum and the effective length of inverted pendulum , with the payload mass ( ) being constant. Other unknown parameters are shown in Tables 1 and 2.
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