Fuel-Efficient on-Orbit Service Vehicle Allocation Based on an Improved Discrete Particle Swarm Optimization Algorithm

Figure 6

Best, average, and worst fitness value curves in each of the four algorithms’ experiment with the fourth optimization results. (a) DPSO-TS algorithm. (b) DPSO algorithm. (c) DPSO-PDM algorithm. (d) CHIDPSO algorithm.

(a)

(b)

(c)

(d)