A unified approach of PID controller design for unstable processes with time delay

2020 ◽  
Vol 27 (9) ◽  
pp. 2643-2661
Author(s):  
Ashraf Raza ◽  
Md Nishat Anwar
Keyword(s):  
Time Delay ◽  
Pid Controller ◽  
Controller Design ◽  
Unified Approach ◽  
Pid Controller Design ◽  
Unstable Processes

PID controller design in the frequency domain for time-delay systems using direct method

2016 ◽  
Vol 40 (3) ◽  
pp. 940-950 ◽  
Author(s):  
Noha Medhat Darwish
Keyword(s):  
Time Delay ◽  
Pid Controller ◽  
Controller Design ◽  
Reference Model ◽  
Direct Method ◽  
Delay Systems ◽  
Time Delay Systems ◽  
Delay Term ◽  
Linear Algebraic Equations ◽  
Pid Controller Design

In this paper, a proportional–integral–derivative (PID) controller design method for stable and integrating time-delay systems with and without non-minimum phase zero (inverse response) using the direct method is proposed. The PID controller gains are obtained by matching the frequency response of the closed-loop control system to that of the reference model with a minimum weighted integral squared absolute error in the bandwidth region. The reference model is chosen to satisfy the desired maximum sensitivity Ms. As a result, three linear algebraic equations in three unknowns are obtained and the solution of them gives the PID controller gains. The proposed method can be applied to low- and high-order systems, and the Pade approximation of the time-delay term e−Ls is not required.

scholarly journals PID Controller Design for TITO Processes Based on IMC and Smith Predictor Configuration

2019 ◽  
Vol 8 (6S4) ◽  
pp. 1522-1526
Keyword(s):  
Time Delay ◽  
Disturbance Rejection ◽  
Pid Controller ◽  
Controller Design ◽  
Control Design ◽  
Smith Predictor ◽  
Point Tracking ◽  
Pid Controller Design ◽  
Reduced Time

This paper describes the design of ProportionalIntegral-Derivative (PID) controller for two variable processes where the two variables need to control. Design of controllers for such a process is too difficult than single variable processes because of interrelations between the two variables present in the system. Hence, the design approach should include the interrelations of the variables to achieve better performance of the processes. In addition to this, the time delay of the processes is also considered and Smith Predictor (SP) configuration is used to reduce the delay in the processes. For the resultant reduced time delay processes, an IMC approach is used to design PID controller. The proposed control system improves both the servo (set point tracking) and regulatory (disturbance rejection) performance of the system. The proposed configuration is also validated using a case study. The simulation results are presented and compared with the other similar approaches to show the efficacy of the proposed method

Sign in / Sign up

Export Citation Format

Share Document