In this paper a robust fractional order PID (FOPID) controller is proposed to control the automatic voltage regulator (AVR) system, tuning of gains are done using whale optimization algorithm (WOA) and integral time absolute error (ITAE) cost function adopted achieve an efficient performance. The transient analysis was compared with conventional in terms overshoot, settling time, rise peak expl...

This paper presents two sets of tuning rules for fractional PIDs that rely solely on the same plant time-response data used by the first Ziegler-Nichols tuning rule for (usual, integer) PIDs. Thus no model for the plant to control is needed; only an Sshaped step response is. These rules are quadratic and their results compare well with those obtained with rule-tuned integer PIDs. INTRODUCTION C...

Differential Evolution (DE) has recently emerged as a simple yet very powerful technique for real parameter optimization. This article describes an application of DE for the design of Fractional-Order Proportional-Integral-Derivative (FOPID) Controllers involving fractional order integrator and fractional order differentiator. FOPID controllers’ parameters are composed of the proportionality co...

This study investigates disturbance rejection capacity of closed loop control systems by means of reference to disturbance ratio (RDR). The RDR analysis calculates the ratio of reference signal energy to disturbance signal energy at the system output and provides a quantitative evaluation of disturbance rejection performance of control systems on the bases of communication channel limitations. ...