Article ID: | iaor19991930 |
Country: | United Kingdom |
Volume: | 18 |
Issue: | 6 |
Start Page Number: | 399 |
End Page Number: | 422 |
Publication Date: | Nov 1997 |
Journal: | Optimal Control Applications & Methods |
Authors: | Sheen I.E., Tsai J.S.H., Shieh L.S. |
This paper proposes a novel optimal digital redesign technique using fractional-order hold for finding a dynamic digital control law from the available analog counterpart and for simultaneously minimizing a quadratic performance index. A method for converting the dynamic digital control law into a static one, through a tuning parameter, is also presented. The proposed technique can be applied to a system cascaded with a more general class of reference inputs than simple step inputs, and the developed digital controller can be implemented via low cost microcomputers. The superiority of using the fractional-order hold over the zero-order hold and the first-order hold is exploited.