Avoid PID problems with this adaptive MVC.

The article reports on Cutler Technology Corp.'s launch of adaptive dynamic matrix control, claimed to be the world's first adaptive multivariable controller (MVC). It uses a patented, open-loop model, which eliminates the proportional, integrations, derivative (PID) controller from the process control hierarchy. PID control must be re-tuned if moving a process unit to a new operating region. The all-valve model permits the contoller to operate with valves all the way open or closed. MVC must prevent the PID-controlled valves from saturating. Using the ADMC, a 2-3% capacity gain can be achieved on a catalytic cracker. Cutler Technology began to install the first commercial ADMC at a U.S. company where it will be used to control a cryogenic natural gas purification plant.