Journal ArticleDOI
Parameter Identification of Delayed Under-Damped Systems Using On-Line Relay Autotuning
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TLDR
An online relay autotuning scheme for parameter estimation of a class of time delayed systems is presented and a pipe-line water pressure control system is identified as under-damped SOPDT transfer function model.Abstract:
In this brief, an online relay autotuning scheme for parameter estimation of a class of time delayed systems is presented. The identification method comprises a relay and a proportional-derivative (PD) controller which helps in yielding sustained oscillation or limit cycles at the system output around the user defined setpoint. Along with the relay and controller parameters, the important limit cycle information are measured and further substituted in the derived set of mathematical expressions required for the estimation of system unknown dynamic in the form of under-damped second-order plus dead-time (SOPDT) model. Simulations of well known model dynamics from the literature are considered to illustrate the efficacy of the proposed scheme in presence of noise and static load disturbance. For the real-time validation of the proposed scheme, a pipe-line water pressure control system is identified as under-damped SOPDT transfer function model.read more
Citations
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Journal ArticleDOI
Energy-Shaping Speed Controller With Time-Varying Damping Injection for Permanent-Magnet Synchronous Motors
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Journal ArticleDOI
Proportional-Derivative Voltage Control With Active Damping for DC/DC Boost Converters via Current Sensorless Approach
Seok-Kyoon Kim,Choon Ki Ahn +1 more
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A Robust Decentralized PID Controller Based on Complementary Sensitivity Function for a Multivariable System
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Journal ArticleDOI
Increment Count Method and Its PLC-Based Implementation for Autotuning of Reduced-Order ADRC With Smith Predictor
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Journal ArticleDOI
Angular Velocity Observer-Based Quadcopter Attitude Stabilization via Pole-Zero Cancellation Technique
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References
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Journal ArticleDOI
Paper: Automatic tuning of simple regulators with specifications on phase and amplitude margins
Karl Johan Åström,Tore Hägglund +1 more
TL;DR: A simple method for estimating the critical gain and the critical frequency is described, which may be used for automatic tuning of simple regulators as well as initialization of more complicated adaptive regulators.
Journal ArticleDOI
Derivation of transfer functions for highly nonlinear distillation columns
TL;DR: Mise en place d'une procedure de commande simple which utilise la methode "autotune" d'Astrom for obtenir les gains and les frequences critiques for chaque element diagonal de la matrice des fonctions de transfert as discussed by the authors.
Journal ArticleDOI
A tutorial review on process identification from step or relay feedback test
TL;DR: The process models with time delay mainly adopted for identification in the literature are presented with a classification on different response types, along with two specific categories for robust identification against load disturbance and the identification of multivariable or nonlinear processes.
Journal ArticleDOI
Autotuning and controller design for processes with small time delays
Somanath Majhi,Derek P. Atherton +1 more
TL;DR: In this paper, a set of general expressions derived from a single asymmetrical relay feedback test for online plant identification is derived, and conditions for the existence of limit cycles in unstable FOPDT and SOPDT processes are derived.
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