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Two design methods for proportional-integral-derivative (PID) controllers are proposed based on the two-degrees-of-freedom (2-DOF) direct synthesis (DS) approach. One method specifies the closed-loop setpoint-to-output transfer function, and the other specifies the closed-loop disturbance-to-output transfer function. With appropriate DS, the 2-DOF controllers are approximated as a PID controller with...
This paper proposes simple analytic formulas for proportional-integral-derivative (PID) controller tuning for typical process models. The formulas are obtained in a similar way to the simple internal model control (SIMC) tuning rules, while the leading analysis is more delicate. Compared to SIMC counterparts, the new tuning formulas lead to better load disturbance rejection while giving similar setpoint...
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