Real Time Optimization by Extremum Seeking Control
Real Time Optimization by Extremum Seeking Control
Principles of Optimal Design
On non-local stability properties of extremum seeking control
Automatica (Journal of IFAC)
Technical communique: On the choice of dither in extremum seeking systems: A case study
Automatica (Journal of IFAC)
Brief Stability of extremum seeking feedback for general nonlinear dynamic systems
Automatica (Journal of IFAC)
Extremum-seeking control of state-constrained nonlinear systems
Automatica (Journal of IFAC)
Extremum seeking control for soft landing of an electromechanical valve actuator
Automatica (Journal of IFAC)
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This paper examines the problem of maximizing net power output in a polymer electrolyte membrane (PEM) fuel cell system. The net power production depends heavily on the oxygen excess ratio in the cathode. However, the time-varying parameters and complex nonlinear dynamics of the system present many challenges to regulating oxygen excess ratio under all operating conditions. A constrained extremum seeking control architecture is presented to effectively regulate oxygen excess ratio about an optimum value that maximizes net power output over a broad range of operating conditions. Simulation results demonstrate that this control technique improves fuel cell system performance and our constrained optimization approach enables faster convergence rates for an admissible level of overshoot.