Enhanced Control of Unstable Cascade Processes with Time Delays Using a Modified Smith Predictor

2009 ◽  
Vol 48 (6) ◽  
pp. 3098-3111 ◽  
Author(s):  
S. Uma ◽  
M. Chidambaram ◽  
A. Seshagiri Rao
Keyword(s):  
Time Delays ◽  
Smith Predictor ◽  
Modified Smith Predictor ◽  
Cascade Processes

Enhanced control of integrating cascade processes with time delays using modified Smith predictor

2010 ◽  
Vol 65 (3) ◽  
pp. 1065-1075 ◽  
Author(s):  
S. Uma ◽  
M. Chidambaram ◽  
A. Seshagiri Rao ◽  
Chang Kyoo Yoo
Keyword(s):  
Time Delays ◽  
Smith Predictor ◽  
Modified Smith Predictor ◽  
Cascade Processes

scholarly journals A Design Method for Smith Predictors for Minimum-Phase Time-Delay Plants

1970 ◽  
Vol 1 (2) ◽  
pp. 100-107
Author(s):  
Kou Yamada ◽  
Nobuaki Matsushima
Keyword(s):  
Time Delay ◽  
Time Delays ◽  
Large Time ◽  
Design Method ◽  
Smith Predictor ◽  
Minimum Phase ◽  
Effective Time ◽  
Phase Time ◽  
Modified Smith Predictor ◽  
Uniform Manner

In this paper, we examine a design method for a modified Smith predictor for minimum-phase timedelay plants. The modified Smith predictor is well known as an effective time-delay compensator for a plant with large time delays, and several papers on the modified Smith predictor have been published. However, the parameterization of all stabilizing modified Smith predictors has not been obtained. If this can be obtained, we can express existing proposals for modified Smith predictors in a uniform manner, and the modified Smith predictor can be designed systematically. The purpose of this paper is to propose the parameterization of all stabilizing modified Smith predictors for minimum-phase time-delay plants. The control characteristics of the control system using the parameterization of all stabilizing modified Smith predictors are also given. Finally, numerical examples for stable plants and unstable plants are illustrated to show the effectiveness of the proposed parameterization of all stabilizing modified Smith predictors.

Performance Analysis of Modified Smith Predictor for Integrating and Time-Delay Processes

2011 ◽  
Vol 53 (4) ◽  
pp. 261-270
Author(s):  
G. Saravana Kumar ◽  
R.S.D. Wahidabanu ◽  
K.G. Arun Raajesh
Keyword(s):  
Time Delay ◽  
Performance Analysis ◽  
Smith Predictor ◽  
Modified Smith Predictor

A Design Method for Modified Smith Predictors for Non-Minimum-Phase Time-Delay Plants with Multiple Feedback-Connected Time-Delays

2010 ◽  
Vol 36 ◽  
pp. 253-262 ◽  
Author(s):  
Iwanori Murakami ◽  
Nghia Thi Mai ◽  
Kou Yamada ◽  
Takaaki Hagiwara ◽  
Yoshinori Ando ◽  
...  
Keyword(s):  
Steady State ◽  
Time Delay ◽  
Time Delays ◽  
Large Time ◽  
Design Method ◽  
Smith Predictor ◽  
Minimum Phase ◽  
Effective Time ◽  
Phase Time ◽  
Step Disturbance

In this paper, we examine a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays. The Smith predictor is proposed by Smith to overcome time-delay and known as an effective time-delay compensator for a plant with large time-delay. The Smith predictor by Smith cannot be used for plants having an integral mode, because a step disturbance will result in a steady state error. Several papers considered the problem to design modified Smith predictors for unstable plants. However, no paper examines a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays. In this paper, we examine a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays.

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