期刊
IET CONTROL THEORY AND APPLICATIONS
卷 5, 期 11, 页码 1321-1334出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-cta.2010.0330
关键词
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In this study, a continuous hybrid differentiator is presented based on a strong Lyapunov function. The differentiator design can not only sufficiently reduce the chattering phenomenon of derivative estimation by introducing a perturbation parameter, but the dynamical performances are also improved by adding linear correction terms to the non-linear ones. Moreover, strong robustness ability is obtained by integrating sliding-mode items and the linear filter. Frequency analysis is applied to compare the hybrid continuous differentiator with a sliding-mode differentiator. The merits of the continuous hybrid differentiator include the excellent dynamical performances, restraining noises sufficiently and avoiding the chattering phenomenon.
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