Threshold for Chaos of a Duffing Oscillator with Fractional-Order Derivative

Table 2

System responses for different typical points (F = 1.5 N).

Points	Excitation frequency (rad/s)	The largest Lyapunov exponents	Motion state
B	3	−0.0287	Period-1
D	2.2	−0.0033	Period-2
E	1.95	−0.0004	Period-4
H	1.5	0.0277	Chaos