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Enhanced frequency response estimator to guarantee pre-specified phase angle and static disturbance rejection with all harmonics removed

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Abstract

We propose a new frequency response estimation method in order to guarantee a pre-specified phase angle of the estimated model under static disturbance circumstances with rejecting harmonics completely. The proposed method uses one cycle of the conventional relay feedback signal followed by a sinusoidal signal. The sinusoidal signal in a cyclic steady state has no harmonics, resulting in exact frequency response estimates. Also, it guarantees the pre-specified phase angle and removes the effects of static disturbances by adjusting the reference value of the sinusoidal signal.

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Authors and Affiliations

  1. Department of Chemical Engineering, Kyungpook National University, 1370 Sankyeok-dong, Buk-gu, Daegu, 702-701, Korea

    Su Whan Sung & Jietae Lee

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  1. Su Whan Sung
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  2. Jietae Lee
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Correspondence to Jietae Lee.

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Sung, S.W., Lee, J. Enhanced frequency response estimator to guarantee pre-specified phase angle and static disturbance rejection with all harmonics removed. Korean J. Chem. Eng. 25, 1273–1278 (2008). https://doi.org/10.1007/s11814-008-0209-9

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  • DOI: https://doi.org/10.1007/s11814-008-0209-9

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