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Aiming to increase the convergence speed of perturbation based extremum seeking control, this paper proposed a novel gradient-based perturbation extremum seeking control (GPESC) scheme by combining sine perturbation signal and input-output gradient. In this scheme, the demodulated output signal in classic extremum seeking control (CESC) is replaced with filtered input-output gradient signal to decrease...
Aiming to improve the frequency bandwidth of angular vibration table, this paper proposes a novel bandwidth extension scheme based on extremum seeking control (ESC). In this scheme, two perturbation extremum seeking controllers are employed to adjust the phase and amplitude of the sine input signal based on the extracted envelope of tracking error as the cost function of ESC to be minimized, for the...
To enhance the dynamic and static performance of the extremum seeking control (ESC) scheme, a novel fast ESC scheme without steady-state oscillation is proposed, in which the structure of the classic ESC scheme is adjusted to make the sinusoidal excitation signal amplitude locally exponentially converge to zero. The improved ESC scheme can speed up the convergence to shorten the seeking time dramatically,...
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