Extremum-seeking control for nonlinear systems with periodic steady-state outputs

Automatica ◽  
2013 ◽  
Vol 49 (6) ◽  
pp. 1883-1891 ◽  
Author(s):  
Mark Haring ◽  
Nathan van de Wouw ◽  
Dragan Nešić
Keyword(s):  
Steady State ◽  
Nonlinear Systems ◽  
Extremum Seeking ◽  
Extremum Seeking Control ◽  
Periodic Steady State

Discrimination of Steady State and Transient State of Extremum Seeking Control via Sinusoidal Detection

2013 ◽  
Author(s):  
Baojie Mu ◽  
Yaoyu Li ◽  
John E. Seem
Keyword(s):  
Steady State ◽  
Control Process ◽  
Transient State ◽  
Design Guidelines ◽  
Extremum Seeking ◽  
Detection Scheme ◽  
Extremum Seeking Control ◽  
Detection Techniques ◽  
Steady State Operation ◽  
Selection Of

A major class of extremum seeking control is based on the use of periodic dither perturbation of plant input for extracting the gradient information. Presence of the dither input into the steady state operation is undesirable in practice due to the possible excessive wear of actuators. It is thus beneficial to stop the dithering action after the extremum seeking process reaches its steady state. In this paper, we propose a method for automatically discriminate between the steady state and the transient state modes of extremum seeking control process using the sinusoidal detection techniques. Some design guidelines are proposed for the parameter selection of the relevant sinusoidal detection scheme. The proposed scheme is validated with simulation study.

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