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In recent decades, several optimization-based methods have been developed for the proportional-integral-derivative (PID) controller design, and the common feature of these methods is that the controller has only one adjustable parameter. To keep the closed-loop systems stable is an essential requirement for the optimization-based PID controllers. In almost(More)
In this paper, the problems of stabilizing integral plants with time delay using the classical proportionalintegral-derivative (PID) controllers and the practical single-parameter (containing only one adjustable parameter) PID controllers are considered, respectively. The complete set of stabilizing parameters of the classical PID controller for the(More)
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)
ISSN: 0020-7721 (Print) 1464-5319 (Online) Journal homepage: http://www.tandfonline.com/loi/tsys20 On the pole of non-square transfer function matrix Moore–Penrose pseudo-inverses Wei Zhang, Linlin Ou, Xing He & Weidong Zhang To cite this article: Wei Zhang, Linlin Ou, Xing He & Weidong Zhang (2015) On the pole of nonsquare transfer function matrix(More)
An analytical H2 controller design approach of homogeneous multi-agent systems with time delays is presented to improve consensus performance. Firstly, a closed-loop multi-input multi-output framework in frequency domain is introduced, and a consensus tracking condition is given. Secondly, the decomposition method is utilized to simplify the analysis of(More)