Tài liệu Thư viện số

Danh mục TaiLieu.VN

ANALYTICAL DESIGN OF ADVANCED IMC-PID CONTROLLER FOR THE DISTURBANCE REJECTION OF FIRST-ORDER PLUS DEAD TIME PROCESSES

A new analytical method for a proportional-integral-derivative (PID)controller cascaded with a lead/lag filter based on the basis of the renowned internal model control (IMC) theory is proposed for the first-order plus dea time (FOPDT), the integrator plus dead time (IPDT), and the unstable FOPDT processes. Analytical tuning rules for the PID filter controller are derived in the transparent way for enhancingthe disturbance rejection. A two degree of freedom (2DOF) control scheme is utilized to cope with both the regulatory and servo problems in a
simple manner. Several illustrative examples are conducted for a broad class of time-delay processesand the simulation results demonstrate that the proposed method affords better performances for both the disturbance rejection and set-point tracking in compared with those of recently well-known design methods, since the controllers in the simulation study are all tuned to have the same degree of robustness in terms of the maximum sensitivity.To demonstrate the robustness of the controllers, the worst-case model mismatch is introduced by inserting perturbation uncertainty in all process parameters simultaneously. The resulting PID characteristics confirm that the proposed controllershold greater robustness against perturbation uncertainty.

Từ khóa: IMC-PID controller, Lead/lag filter, Disturbance rejection, Set-point tracking, Two degree of freedom (2DOF) control scheme

8 p ovanketv4 19/12/2016 482 2

Bạn đang xem trang mẫu tài liệu này.
Bình luận