| Operating
Unit / Process |
What
to Control |
Why
Is It Difficult |
Which
MFA to Use |
Oil recovery boilers
Application
Sheet
Article
|
Steam dryness |
Quality variable with large time delays |
Anti-delay MFA |
| Combustion |
Optimal fuel-air-ratio |
SISO MFA |
Gas pipeline
Request
white paper |
Gas pressure |
Keep pressure within a boundary to avoid tripping |
High-speed Robust MFA |
Oil-gas-water
separators
Application
Sheet - Oil
Application
Sheet - Gas
|
Water level |
Minimize water level and keep it from running dry |
Robust MFA |
| Pressure |
Nonlinear |
Nonlinear MFA |
| Oil level |
Multivariable |
MIMO MFA |
Municipal gas grids
Request
white paper |
Gas pressure |
Multivariable with large and varying time delays |
SISO or MIMO Anti-delay MFAs |
| Gas well |
Gas flow |
Nonlinear |
Nonlinear MFA |
Gas storage facility
Request
white paper |
Gas temperature |
Large time delay |
Anti-delay MFA |
Oil well drilling
equipment
Request
white paper |
Weight |
High-speed, large Tau/T Ratio |
High-speed Anti-delay MFA |
| Weight inner-loop |
High-speed nonlinear |
High-speed Nonlinear MFA |
Gas compressors
Request
white paper |
Speed |
High-speed nonlinear |
High-speed Nonlinear MFA |
Wastewater treatment
Application
Sheet
|
pH Control |
Large gain changes in Log scale, large delay time |
MFA pH or
Anti-delay MFA pH |
