A Strange Double-Deck Butterfly Chaotic Attractor from a Permanent Magnet Synchronous Motor with Smooth Air Gap: Numerical Analysis and Experimental Observation

Figure 8

Time series and power spectrum of the system (6) with 𝐴=0.2 and 𝜔=0.6.

(a) Time series of 𝑥

(b) Local single-sided amplitude spectrum of 𝑥