For the two input two output process in Example 18.2, use Simulink to check the stability regions

Question:

For the two input two output process in Example 18.2, use Simulink to check the stability regions in Fig. 18.6 for the 1-1, 2-2 controller pairing. Set K_c1= 1, and try three values of K_c2(-1, 0, and +2) by simulating a unit set-point change in y₁with both loops in automatic (proportional control only).

4 Ke2 4 5 6 7 3 Stable region Figure 18.6 Stability region for Example 18.2 with 1-1/2-2 controller pairing. 2. 3. 2.