This paper studies the antiwindup synthesis problems for plants with coprime factor uncertainties. The proposed technique utilizes an equivalent framework of compensated systems to investigate the robustness of the antiwindup compensators. The penalty operators of the input saturation are studied originally in general cases. Robustness criteria are proposed for an antiwindup compensated system ...

This paper describes a fuzzy logic based slip controller for an induction motor, with efficiency optimization for steady state operation. The speed control is accomplished through a Mandani type fuzzy controller, with 11 rules, taking speed error (built with 5 Membership Functions M.F.) and speed error variation (3 M.F.) as inputs, to produce the slip increment (5 M.F.). The average motor input...

A novel Modified PID (MPID) controller is developed to control and minimize the effect of hysteresis in Pneumatic proportional valves. It consists of four parts: a Proportional-Integral-Derivative (PID) controller, a Feedforward term, an Anti-Windup mechanism, and a Bang-Bang controller. The result is a unique Modified PID (MPID) control scheme that demonstrates better command following and dis...

This paper describes a practical control method for nanometer level point-to-point positioning (PTP) using a conventional ballscrew mechanism. nominal characteristic trajectory following controller (NCTF controller) is used for the ultra-precision positioning. The controller design, which s comprised of a nominal characteristic trajectory (NCT) and a PI compensator, is free from exact modeling ...

This manuscript addresses the problem of “tuning the antiwindup mechanism” of PI(D) controllers, an issue seldom addressed in the literature but yielding improvement and reducing undesired large-transient behaviours if tackled correctly. A previously proposed framework is extended and related to both alternative antiwindup implementations and tuning methods, resulting in more methodological ins...

This paper considers closed-loop quadratic stability and 2 performance properties of linear control systems subject to input saturation. More specifically, these properties are examined within the context of the popular linear antiwindup augmentation paradigm. Linear antiwindup augmentation refers to designing a linear filter to augment a linear control system subject to a local specification, ...

This paper presents the design, analysis and implementation of speed control drive indirect Field Oriented Control (FOC) induction motor using a dSPACE DS1103 digital-signal-processorbased real-time data acquisition control system and MATLAB/Simulink environment. The details design of speed control indirect Field Oriented Control (FOC) induction motor drive with AntiWindup PI controllers' (AWPI...

A robust control scheme is proposed for the position control of the electrohydrostatic actuator (EHA) when considering hardware saturation, load disturbance, and lumped system uncertainties and nonlinearities. To reduce overshoot due to a saturation of electric motor and to realize robustness against load disturbance and lumped system uncertainties such as varying parameters and modeling error,...

This note considers linear systems subject to actuator saturation. An antiwindup technique is used to enlarge the domain of attraction of the closed-loop system under an a priori designed linear dynamic feedback law. The design of the antiwindup compensation gain is formulated and solved as an iterative optimization problem with LMI constraints. Numerical examples are used to demonstrate the ef...