Page 182 - Distributed model predictive control for plant-wide systems

156 Distributed Model Predictive Control for Plant-Wide Systems

Outputs Control variables
1.5 4
3
1
2
y 1 0.5 u 1
1
0
0
–0.5 –1
0 20 40 60 80 100 0 20 40 60 80 100
Time (s) Time (s)
1.5 1.5
1 1

y 2 0.5 u 2 0.5
0 0

–0.5 –0.5
0 20 40 60 80 100 0 20 40 60 80 100
Time (s) Time (s)

Figure 7.11 Outputs and control signals under the N-DMPC iterative algorithm

200

180

160

140
Performance index 100 Neighborhood optimization
120
Nash optimization
Decentralized MPC
80
60

40

20

0
0 20 40 60 80 100
Time (s)

Figure 7.12 Performance index comparisons for three schemes