IMC based PI/PID controller tuning rule for time delay processes

The motivation of this study is to obtain single PI/PID tuning formula for different type of processes with enhanced disturbance rejection performance. A simple tuning formula gives the consistently better performance as compared to well-known SIMC method at the same degree of robustness for stable and integrating process. The performance of the unstable process has been compared with other recently published method which also shows significant advantage in the proposed method. For the selection of the closed-loop time constant, (tc), a guideline is provided over a broad range of time-delay/time-constant ratios on the basis of the peak of maximum uncertainty (Ms). Comparison of the IAE has been conducted for wide range of θ/t ratio for the first order time delay process. The proposed method gives better performances for wide range of θ/t ratio as compared to SIMC while Lee et al. shows poor disturbance rejection in lag dominant process.

[1]  S. Skogestad.  Simple analytic rules for model reduction and PID controller tuning , 2004 .

[2]  M. Morari,et al.  Internal model control: PID controller design , 1986 .

[3]  Moonyong Lee,et al.  Enhanced disturbance rejection for open-loop unstable process with time delay. , 2009, ISA transactions.

[4]  Sigurd Skogestad,et al.  The setpoint overshoot method: A simple and fast closed-loop approach for PID tuning , 2010 .

[5]  T. Harris,et al.  "Internal model control. 4. PID controller design." Comments , 1987 .

[6]  Moonyong Lee,et al.  IMC−PID Controller Design for Improved Disturbance Rejection of Time-Delayed Processes , 2007 .

[7]  W. Luyben,et al.  Tuning PI controllers for integrator/dead time processes , 1992 .

[8]  Morimasa Ogawa,et al.  The state of the art in chemical process control in Japan: Good practice and questionnaire survey , 2010 .

[9]  Sunwon Park,et al.  PID controller tuning for desired closed‐loop responses for SI/SO systems , 1998 .

[10]  Moonyong Lee,et al.  Design of advanced PID controller for enhanced disturbance rejection of second-order processes with time delay , 2008 .

[11]  Thomas F. Edgar,et al.  Process Dynamics and Control , 1989 .

[12]  Moonyong Lee,et al.  PID controller design for integrating processes with time delay , 2008 .

[13]  Wen Tan,et al.  IMC design for unstable processes with time delays , 2003 .

[14]  M. Shamsuzzoha,et al.  Design of IMC filter for PID control strategy of open-loop unstable processes with time delay , 2012 .

[15]  L. Desborough,et al.  Increasing Customer Value of Industrial Control Performance Monitoring—Honeywell’s Experience , 2002 .

[16]  C. Hang,et al.  IMC-Based Control System Design for Unstable Processes , 2002 .

[17]  Sunwon Park,et al.  PID controller tuning for integrating and unstable processes with time delay , 2000 .