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Disturbance Rejection with Highly Oscillating Second-Order-Like Process, Part VIII: Cascade Controller with PI and P sub-controllers

	International Journal of Recent Engineering Science (IJRES)
	© 2015 by IJRES Journal
	Volume-2 Issue-4
	Year of Publication : 2015
	Authors : Galal Ali Hassaan
	DOI : 10.14445/23497157/IJRES-V2I4P104

How to Cite?

Galal Ali Hassaan, "Disturbance Rejection with Highly Oscillating Second-Order-Like Process, Part VIII: Cascade Controller with PI and P sub-controllers," International Journal of Recent Engineering Science, vol. 2, no. 4, pp. 15-19, 2015. Crossref, https://doi.org/10.14445/23497157/IJRES-V2I4P104

Abstract
The objective of this paper is to investigate a cascade controller with PI and P sub-controllers to reject disturbances associated with highly oscillating second-order-like processes. The cascade controller is tuned using MATLAB control and optimization toolboxes with four objective functions in terms of the error between the step disturbance time response of the closed-loop control system and the desired steady-state value. Using the cascade controller resulted in disturbance time response with relatively small levels with maximum value as low as 0.04. The performance of the control system using the cascade controller is compared with that using PDPI, PIPD, IPD, 2DOF, PPI and PIP controllers used with the same process. It can compare well with the PDPI controller.

Keywords
Cascade controller, Highly oscillating second-order-like process, Controller tuning, Control system performance.

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