| Operating
Unit / Process |
What
to Control |
Why
Is It Difficult |
Which
MFA to Use |
Municipal water
Application
sheet |
Water turbidity |
Large time delay |
Anti-delay MFA |
Glass melters or furnaces
Request
white paper |
Outlet temperature |
Time-varying |
Time-varying MFA |
| Combustion |
Optimal fuel-air-ratio |
SISO MFA |
Glass forehearth
Request
white paper |
Outlet temperature |
Large time delays |
Anti-delay MFA |
| Zone temperature |
Multivariable |
MIMO MFA |
| Combustion |
Optimal fuel-air-ratio |
SISO MFA |
Cement rotary
kilns
Application
Sheet |
Outlet temperature |
Large time delays |
Anti-delay MFA |
| Large load changes |
Feedforward MFA |
| Combustion |
Optimal fuel-air-ratio |
SISO MFA |
Metal plating or galvanizing lines
Application
Sheet |
Thickness |
Large time delays |
Anti-delay MFA |
| Product spec changes |
FF Trim MFA |
| Thickness inner-loop |
Wind-knife position or current (Nonlinear) |
Nonlinear MFA |
Product sheet
rolling lines
Request
white paper |
Thickness |
High-speed, large Tau/T Ratio |
High-speed Anti-delay MFA |
| Product spec changes |
FF Trim MFA |
| Thickness inner-loop |
High-speed nonlinear |
High-speed Nonlinear MFA |
Dryers
Request
white paper |
Moisture |
Large time delays |
Anti-delay MFA |
| Temperature |
Large load changes |
FB/FF MFA |
Rubber Extruders
Request
white paper |
Thickness |
Large and varying time delays, high-speed, varying product
compounds |
Special MISO MFA |
Ore ball mills
Request
white paper |
Speed and efficiency |
A combined control and optimization problem |
Anti-inverse MFA and SISO MFA |
Wastewater treatment
Application
Sheet |
pH Control |
Large gain changes in Log scale, large delay time |
MFA pH or Anti-delay MFA pH |
