Smith predictor based control strategies for nonminimum phase plants

The present paper proposes design strategies, based on the Smith predictor and its variants, for controlling nonminimum phase plants, by treating the right half plane (RHP) zeros of the system in the same way as the delay term in case of the conventional Smith predictor. Simple controllers, in conjunction with these Smith predictor like structures, can achieve good performance in terms of steady state error and disturbance rejection, for both type zero plants, as well as for plants with an integral mode. Additionally, here the order of the plant and the number of RHP zeros of the plant are not restricted. Simulations corroborate the theoretical results.

[1]  José Luis Guzmán,et al.  An unified approach for DTC design using interactive tools , 2009 .

[2]  Julio E. Normey-Rico,et al.  Dealing with noise in unstable dead-time process control , 2010 .

[3]  Wei Xing Zheng,et al.  A double two-degree-of-freedom control scheme for improved control of unstable delay processes , 2005 .

[4]  M. Matausek,et al.  A modified Smith predictor for controlling a process with an integrator and long dead-time , 1996, IEEE Trans. Autom. Control..

[5]  K. Kashima,et al.  A Smith-type Predictor for Non-minimum Phase Infinite-dimensional Plants and its Dual Structure , 2006, Proceedings of the 45th IEEE Conference on Decision and Control.

[6]  Furong Gao,et al.  Double-controller scheme for control of processes with dominant delay , 1998 .

[7]  G. G. Stokes "J." , 1890, The New Yale Book of Quotations.

[8]  O. J. M. Smith,et al.  A controller to overcome dead time , 1959 .

[9]  Masami Ito,et al.  A process-model control for linear systems with delay , 1981 .

[10]  C. C. Hang,et al.  A new Smith predictor for controlling a process with an integrator and long dead-time , 1994, IEEE Trans. Autom. Control..

[11]  D Vrecko,et al.  A new modified Smith predictor: the concept, design and tuning. , 2001, ISA transactions.

[12]  Ljubi sa S. Draganovi,et al.  A NEW SMITH PREDICTOR FOR CONTROLLING A PROCESS WITH AN INTEGRATOR AND LONG DEAD-TIME : DESIGN AND TUNING , 2022 .

[13]  D. M. Schneider Control of processes with time delays , 1988 .

[14]  E.F. Camacho,et al.  A unified approach to design dead-time compensators for stable and integrative processes with dead-time , 2001, Proceedings of the 40th IEEE Conference on Decision and Control (Cat. No.01CH37228).