Asymmetric Double Strange Attractors in a Simple Autonomous Jerk Circuit

Figure 9

Experimental phase portraits (left) obtained from the circuit using a dual-trace oscilloscope in ; the corresponding numerical phase portraits (right) showing the period-doubling routes to chaos in the system for varying : (a) period-1 cycle for ; (b) period-2 cycle for ; (c) period-4 cycle for ; (d) spiralling-like (Feigenbaum) chaotic attractor for ; (e) screw-like (Shilnikov) chaotic attractor for ; (f) another screw-like (Shilnikov) chaotic attractor for .