When tuning fails, it is time to look outside the PID for a solution ... Figure 1 shows a typical process control feedback loop in block diagram format. An operator or a control strategy determines ...

When a PID controller is used on a process that has dead time ... manipulates a properly selected control valve that has a high-performance digital positioner. Figure 4. Process and control diagram ...

and if you’ve ever taken a control systems class you might remember seeing pages full of differential equations and bode diagrams just to describe its basic operation. Although this might make ...