Supervisory Control
In a manually-controlled process, a human operator directly actuates some form of final control element (usually a valve) to influence
Control Systems
We have the largest collection of Industrial Control Systems articles like industrial automation, Distributed Control Systems (DCS).
Tuning a Temperature Process Control Loop
Tuning a Temperature Process Control Loop Ziegler-Nichols open-loop tuning procedure This next simulated process is a temperature control process. Performing
Tuning a Liquid Level Process Control Loop
Ziegler-Nichols open-loop tuning procedure The next simulated process I attempted to tune was a liquid level-control process. Performing an open-loop
Features of PID Controller actions
Purpose of each Controller action Proportional action is the “universal” control action, capable of providing at least marginal control quality
PID Tuning Recommendations based on Process Dynamics
Knowing which control actions to focus on first is a matter of characterizing the process (identifying whether it is self-regulating,
Heuristic PID Tuning Procedure
From the initial open-loop (manual output step-change) test, we could see this process contains multiple lags in addition to about
Ziegler-Nichols Closed Loop Tuning Procedure
The closed-loop, or “Ultimate” tuning method of Ziegler and Nichols was applied to this process. Eliminating both integral and derivative
Ziegler-Nichols Open Loop Tuning Procedure
The first process tuned in simulation was a “generic” process, unspecific in its nature or application. Performing an open-loop test
Recognizing an Over-Tuned PID Controller by Phase Shift
When performing heuristic tuning of a PID controller, it is important to be able to identify a condition where one
Recognizing a Porpoising PID Controller
An interesting case of over-tuning is when the process variable “porpoises” (Note 1 ) on its way to setpoint following
