Procedure for Cascade Control Systems Design: Choice of Suitable PID Tunings

  • Orlando Arrieta Universitat Autònoma de Barcelona Departament de Telecomunicació i d’Enginyeria de Sistemes, ETSE 08193 Bellaterra, Barcelona, Spain. E-mail: {Orlando.Arrieta, Ramon.Vilanova, Pedro.Balaguer}@uab.cat ?Universidad de Costa Rica Departamento de Automática, Escuela de Ingeniería Eléctrica P.O. Box 11501-2060 UCR, San José, Costa Rica.
  • Ramon Vilanova Universitat Autònoma de Barcelona Departament de Telecomunicació i d’Enginyeria de Sistemes, ETSE 08193 Bellaterra, Barcelona, Spain.
  • Pedro Balaguer Universitat Autònoma de Barcelona Departament de Telecomunicació i d’Enginyeria de Sistemes, ETSE 08193 Bellaterra, Barcelona, Spain.

Abstract

This paper provides an approach for the application of PID controllers within a cascade control system configuration. Based on considerations about the expected operating modes of both controllers, the tuning of both inner and outer loop controllers are selected accordingly. This fact motivates the use of a tuning that, for the secondary controller, provides a balanced set-point / load-disturbance performance. A new approach is also provided for the assimilation of the inner closed-loop transfer function to a suitable form for tuning of the outer controller. Due to the fact that this inevitably introduces unmodelled dynamics into the design of the primary controller, a robust tuning is needed.

References

[1] Thomas E. Marlin, Process Control: Designing Processes and Control Systems for Dynamic Performance, McGraw-Hill, 2000.

[2] Dale E. Seborg, Thomas F. Edgar, and Duncan A. Mellichamp, Process Dynamics and Control, John Wiley and Sons, 2004.

[3] C. C. Hang, A. P. Loh, and V. U. Vasnani, "Relay feedback autotuning of cascade controllers," IEEE Transactions on Control Systems Technology, vol. 2, 1994.

[4] Yongho Lee and Sunwon Park, "PID controller tuning to obtain desired closed loop responses for cascade control systems," Ind. Eng. Chem. Res., vol. 37, pp. 1859–1865, 1998.
http://dx.doi.org/10.1021/ie970769t

[5] K. K. Tan, T. H. Lee, and R. Ferdous, "Simultaneous online automatic tuning of cascade control for open loop stable processes," ISA Transactions, vol. 39, pp. 233–242, 2000.
http://dx.doi.org/10.1016/S0019-0578(00)00006-9

[6] I. Kaya, N. Tan, and D. P. Atherton, "Improved cascade control structure for enhanced performance," vol. 17, pp. 3U˝ 16, 2007.

[7] O. Arrieta and R. Vilanova, "Performance degradation analysis of Optimal PID settings and Servo/ Regulation tradeoff tuning," CSC07, Conference on Systems and Control, Marrakech-Morocco, 2007.

[8] O. Arrieta and R. Vilanova, "Servo/regulation tradeoff tuning of PID controllers with a robustness consideration," CDC07, 46th IEEE Conference on Decision and Control, New Orleans, Louisiana- USA, 2007.
http://dx.doi.org/10.1109/cdc.2007.4434930

[9] O. Arrieta and R. Vilanova, "Stability margins characterization of a combined servo/regulation tuning for PID controllers," ETFA07, 12th IEEE Conference on Emerging Technologies and Factory Automation, Patras-Greece, 2007.
http://dx.doi.org/10.1109/efta.2007.4416817

[10] M.A. Johnson and M. H. Moradi, PID Control. New Identificaton and Design Methods, Springer Verlag, 2005.

[11] K.J. Aström and T. Hägglund, Advanced PID Control, ISA - The Instrumentation, Systems, and Automation Society, 2006.

[12] M. Zhuang and D. Atherton, "Automatic tuning of optimum PID controllers," vol. 140, no. 3, pp. 216–224, 1993.

[13] A. C. Smith and B. A. Corripio, Principles and Practice of automatic process control, John Wiley & Sons, 1985.

[14] R. Vilanova, "IMC based robust PID design: Tuning guidelines and automatic tuning," Journal of Process Control, vol. 18, pp. 61–70, 2008.
http://dx.doi.org/10.1016/j.jprocont.2007.05.004

[15] R. Vilanova, O. Arrieta "Balanced PID Tuning Application to Series Cascade Control Systems," International Conference on Computers Comunications and Control, Felix-Spa, Romania, 15-17 May, 2008.

[16] A. Visioli and A. Piazzi, "An automatic tuning method for cascade control systems," 2006 IEEE International Conference on Control Applications, Munich, Germany, October 4-6, 2006
http://dx.doi.org/10.1109/cacsd-cca-isic.2006.4777110
Published
2008-09-01
How to Cite
ARRIETA, Orlando; VILANOVA, Ramon; BALAGUER, Pedro. Procedure for Cascade Control Systems Design: Choice of Suitable PID Tunings. INTERNATIONAL JOURNAL OF COMPUTERS COMMUNICATIONS & CONTROL, [S.l.], v. 3, n. 3, p. 235-248, sep. 2008. ISSN 1841-9844. Available at: <http://univagora.ro/jour/index.php/ijccc/article/view/2392>. Date accessed: 04 july 2020. doi: https://doi.org/10.15837/ijccc.2008.3.2392.

Keywords

PID Control, Cascade control systems, Performance Degradation