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In this paper a novel ratio control scheme is proposed for stable and unstable processes with time delay. The proposed ratio control system consists of two control loops with two-degrees-of-freedom control structure, which decouples the set-point response of each loop from its disturbance response. Two ratio controllers separately for the set-point and load(More)
A simple and effective method to determine the region of fractional-order PI<sup>&#x03BB;</sup>D<sup>&#x03BC;</sup> controllers that can stabilize a given fractional-order system with time delay is proposed in this paper. For each known proportional, integral or derivative gain in the PI<sup>&#x03BB;</sup>D<sup>&#x03BC;</sup> controllers, the stability(More)