A Comparison of Different Control Design Methods for the Linearized CSTR Temperature Model A. D. Shakib Joo Faculty of Electrical and Computer Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran Corresponding Author: [email protected] ARTICLE INFO ABSTRACT ARTICLE HISTORY: Received 4 October 2013 Revised 12 December 2013 Accepted 15 December 2013 Continuous Stirred Tank Re...

The purpose of this paper is to demonstrate the autocovariance least-squares (ALS) techniques to a laboratory reactor for the conversion of acetic anhydride to acetic acid. In this way, it is demonstrated that the methods proposed by Odelson and Rawlings are applicable to actual process data, and not just theoretical simulations. A variety of control scenarios are tested including: simple regul...

The performance of a linear, discrete high performance track following controller in a hard disk drive is improved for its disturbance rejection by the introduction of a discrete non-linear, adaptive neural network (NN) element. The NN-element is deemed to be particularly effective for rejection of bias forces and friction. Theoretical, simulation and experimental results have been obtained. It...

This work proposes a systematic two-degree freedom control scheme to improve the reference input tracking and load disturbance rejection for an unstable magnetic levitation system. The proposed control strategy is a two-step design process. Firstly, a proportional derivative controller is introduced purposely to get the desired set-point response of the magnetic levitation system and then, an i...

We construct two error feedback controllers for robust output tracking and disturbance rejection of a regular linear system with nonsmooth reference and disturbance signals. We show that for sufficiently smooth signals the output converges to the reference at a rate that depends on the behavior of the transfer function of the plant on the imaginary axis. In addition, we construct a controller t...

In this paper, a state feedback H¥ controller is proposed in order to design an active queue management (AQM) system based on congestion control algorithm for networks supporting TCP protocols. In this approach, the available link bandwidth is modeled as a time-variant disturbance. The purpose of this paper is to design a controller which is capable of achieving the queue size and can guarantee...

T HERE IS EVEN INCREASING DESIRE ON ACHIEVING HIGH PRECISION CONTROL for new generations of mechatronics and robotics, electrical machines and drives, power electronics, energy conversion, aerospace and automotive systems. However disturbances and uncertainties caused by the changes of the physical system or its operational environment are widely present. As is well known, there are a number of...

The problem of optimal HI disturbance rejection while tracking uncertain constant or sinusoidal reference commands is considered. The internal model principle is used to ensure that the tracking error approaches zero asymptotically. Necessary conditions are given for controllers that minimize an HI disturbance rejection cost plus a worst-case integral square tracking error for transient trackin...

In this paper, a linear active disturbance rejection controller is proposed for a waste heat recovery system using an organic Rankine cycle process, whose model is obtained by applying the system identification technique. The disturbances imposed on the waste heat recovery system are estimated through an extended linear state observer and then compensated by a linear feedback control strategy. ...

A nonlinear PID (NPID) controller for a class of linear plants with output feedback is studied. The controller gains are modulated by the control error and error rate to yield a closed-loop system for improved disturbance rejection. An optimization problem involving constraints written as linear matrix inequalities (LMIs) is solved to compute the controller parameters. A hard disk drive (HDD) c...