Multiple-Model Optimization of Proportional Integral Controllers on Canals

On the equivalence of proportional-integral and proportional-resonant controllers with anti-windup

It is shown that proportional-integral (PI) control in the synchronously rotating (d, q)-reference frame and proportional-resonant (PR) control in the stationary (α, β)-reference frame, both with anti-windup, are equivalent if and only if their implementation is done correctly in state space and the controller parameters and the initial values are identical. It is shown that an equivalence in t...

Design and Optimization of Fractional Order Proportional Integral Derivative Controllers for Hard- Disk Drive Servo Systems

Hard-disk drives (HDD‘s) are widely used data storage medium for computers and many other data processing devices. The servo mechanism in HDD plays an important role in high performance requirements of HDD‘s. Gain variations present in hard ware components of HDD‘s affects the consistent track following performances. So the servo system needs to improve in track following and robustness perform...

Stability Analysis of Proportional-Integral AQM Controllers Supporting TCP Flows

Abstract This paper focuses on the asymptotic stability of proportional-integral AQM controllers supporting TCP flows. Necessary and sufficient conditions for the asymptotic stability of the closed-loop linearization are provided. As a result, the complete set of proportional-integral controllers that locally stabilizes the equilibrium point is obtained. The robustness of the controllers to unc...

Design Methods and Tuning of Bilinear Proportional-integral-plus Controllers

Proportional-integral controllers for minimum-phase nonaffine-in-control systems

We show that stabilizing tracking proportional-integral (PI) controllers can be constructed for minimum-phase nonaffine-in-control systems. The constructed PI controller is an equivalent realization of an approximate dynamic inversion controller. This equivalence holds only for the time response when applied to the unperturbed system. Even when restricted to unperturbed minimum-phase linear tim...