scholarly journals A constrained robust least squares approach for contaminant release history identification

2006 ◽  
Vol 42 (4) ◽  
Author(s):  
Alexander Y. Sun ◽  
Scott L. Painter ◽  
Gordon W. Wittmeyer
Keyword(s):  
Least Squares ◽  
Robust Least Squares ◽  
Contaminant Release ◽  
Least Squares Approach

scholarly journals Combined Constrained Robust Least Squares Approach and Block-Pulse Functions Technique for Tracking Control Synthesis of Uncertain Bilinear Systems with Multiple Time-Delayed States under Bounded Input Control

2020 ◽  
Vol 2020 ◽  
pp. 1-28
Author(s):  
Bassem Iben Warrad ◽  
Mohamed Karim Bouafoura ◽  
Naceur Benhadj Braiek
Keyword(s):  
Control Problem ◽  
Least Squares ◽  
Tracking Control ◽  
Bilinear Systems ◽  
Control Synthesis ◽  
Multiple Time ◽  
Paper Machine ◽  
Block Pulse Functions ◽  
Robust Least Squares ◽  
Least Squares Approach

The present study tackles the tracking control problem for unstructured uncertain bilinear systems with multiple time-delayed states subject to control input constraints. First, a new method is introduced to design memory state feedback controllers with compensator gain based on the use of operational properties of block-pulse functions basis. The proposed technique permits transformation of the posed control problem into a constrained and robust optimization problem. The constrained robust least squares approach is then used for determination of the control gains. Second, new sufficient conditions are proposed for the practical stability analysis of the closed-loop system, where a domain of attraction is estimated. A real-world example, the headbox control of a paper machine, demonstrates the efficiency of the proposed method.

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