A New Approach to Achieve Variable Negative Stiffness by Using an Electromagnetic Asymmetric Tooth Structure

Table 3

Comparison of the theoretical resonance frequency and the experimental resonance frequency for various current.

Current (A)	Theoretical resonance frequency (Hz)	Experimental resonance frequency (Hz)	Error ratio (%)
0	23.24	23.25	0.04
0.3	22.51	22.50	0.04
0.4	21.93	22.00	0.32
0.5	21.16	21.25	0.42
0.6	20.17	20.25	0.40
0.7	18.94	19.25	1.61
0.8	17.41	17.00	2.41