Disturbance rejection is an essential — and frequently misunderstood — application of the PID controller. When tuned properly to suppress load disturbances, a PID can deliver tighter control, reduced variability, and superior product quality. When tuned instead for Setpoint tracking and left to handle disturbances as an afterthought, however, the same controller will consistently under-perform when process stability matters most.

To help engineers tune for disturbance rejection, Control Station provides this simple and practical Disturbance Rejection Checklist as a field-tested resource for evaluating, designing, and validating disturbance rejection strategies.