A new method for designing PID Controllers using Bode's ideal transfer function and constrained Particle Swarm Optimization (PSO) is proposed in this paper. Bode's ideal transfer function is introduced using fractional calculus and Carlsson's approximation is used for converting the transfer function from fractional to integer domain. The PID controller is designed by minimizing ...

A fractional order (FO) PID or FOPID controller is designed for an Automatic Voltage Regulator (AVR) system with the consideration of contradictory performance objectives. An improved evolutionary Nondominated Sorting Genetic Algorithm (NSGA-II), augmented with a chaotic Henon map is used for the multiobjective optimization based design procedure. The Henon map as the random number generator ou...

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. ...

Permanent magnet synchronous motor (PMSM) AC servo system has the characteristics of uncertainty, time-varying, nonlinear and fractional order. Applying traditional control method is difficult to achieve desired effect. The fuzzy strong adaptability parameter change, nonlinearity imprecise model controlled object. simulation permanent three closed-loop systems established. principle realization...

Agriculture activities are completely dependent upon energy production worldwide. This research presents sensorless speed control of a three-phase induction motor aided with an extended Kalman filter (EKF). Although proportional integral (PI) controller can ensure tracking the rotor speed, considerable magnitude ripples is present in torque generated by motor. Adding simple derivative to have (...

Continuum robots are the behavioral extension of hyper-redundant usually inspired by living biological organs. These outperform their rigid counterparts regarding high flexibility, dexterity, and most importantly safe interaction. On flip side, they kinematically redundant, highly nonlinear, multi-input, consequently, controlling remains a complex challenging task. To this end, paper proposes F...