Optimising Control Strategies
One of the most surprising aspects of the digital revolution in control technology over the last 20 years is the "fit and forget" approach that many companies take to the DCS investments they have made. Often we see:
- Controllers left with "default" tuning set at the Factory Acceptance Test
- Controllers tuned once during early commissioning, then left (process dynamics can and will change as equipments beds in or fouls!)
- Automatic tuning set without thought to the plant dynamics (for instance really steady levels in intermediate tanks!
- Interactions between controls on different plant units provided by different suppliers