Stabilisation of unstable FOPDT processes with a single zero by fractional-order controllers |
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| Authors: | Iraj Kheirizad Khosro Khandani |
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| Affiliation: | Electrical Engineering Department , Iran University of Science and Technology , Tehran , Iran |
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| Abstract: | In this article, stabilisation of unstable first-order-plus-dead-time (FOPDT) processes with a single zero by fractional-order (FO) controllers is investigated. A Nyquist stability criterion-based approach is adopted to derive the conditions for stability. Sufficient stabilisability conditions by FO proportional integral] controllers and FO-lead–lag controllers are established. In addition, robust stability of the system with these FO controllers is investigated. To illustrate the results, some examples are provided. |
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| Keywords: | stabilisation unstable FOPDT processes fractional-order controllers robust stability |
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