The non-minimum phase plants with unstable zeros exists widely in the process of power production.Because of the non-minimum phase characteristics

the control system should ensure internal stability while completing output tracking

and improve response speed while overcoming the undershoot. The general PID control cannot meet the requirements of engineering applications. An engineering control and tuning method for nonminimum phase plants is proposed in this paper. Firstly

a robust PID controller is designed to ensure the stability of the closed-loop control system and overcome the under shoot of the system. Secondly

design a second-order filter that includes system position error

velocity error

and acceleration error to improve the response speed and dynamic performance of the control system. This method is simple

easy to tune

easy to configure in DCS

and has strong robustness to model uncertainty

which is worth promoting in engineering.