Abstract
To solve the oxygen supply problem of proton exchange membrane fuel cell (PEMFC), this paper presents a reduced-order active disturbance rejection control method for PEMFC air intake system based on the estimation of oxygen excess ratio(EOER-RADRC). First, a control-oriented third-order nonlinear model was established based on PEMFC air intake system. Then, based on the control-oriented model, the disturbance extended state observer was designed to solve the problem of unmeasured cathode pressure parameters in the calculation of oxygen excess ratio (OER), and realize the real-time estimation of OER. Next, aiming at the large phase lag of active disturbance rejection control (ADRC), a reduced-order ADRC method based on reduced-order extended state observer was proposed by a variable substitution technique. So, the proposed method reduces the observation phase lag and improves the dynamic response performance under good anti-disturbance ability. Finally, the simulation and hardware-in-the-loop experience results showed that the proposed method has an excellent control effect compared with other methods.
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