The control objective for the jacketed stirred reactor process is to minimize the impact on reactor operation when the temperature of the liquid entering the cooling jacket changes. We have previously established the performance capabilities of a PI controller in rejecting the impact of this disturbance.
The same tuning recipe we successfully demonstrated for PI control and PID controldesign and tuning can be used when a controller output (CO) filter is added to the heat exchanger process control loop. Here we explore PID with CO Filter control using the unified (controller with internal filter) form. We showed in this previous article […]
The derivative action of a PID controller can cause noise in the measured process variable (PV) to be amplified and reflected as “chatter” in the controller output (CO) signal. Signal filters, implemented as either analog hardware or digital software, offer a popular solution to this problem.
In our study of the derivative mode of a PID controller, we explored how noise or random error in the measured process variable (PV) can degrade controller performance. As discussed in that article, derivative action can cause the noise in the PV measurement to be reflected and amplified in the controller output (CO) signal, producing […]