Harmonic Detection Method Based on Particle Swarm Optimization and Simulated Annealing Algorithm of Electrohydraulic Servo System

Figure 6

Phase curves of each degree detected based on PSO-SA and PSO algorithm: (a) fundamental wave, (b) second harmonic, (c) third harmonic, (d) fourth harmonic, (e) fifth harmonic, and (f) sixth harmonic.

(a)

(b)

(c)

(d)

(e)

(f)