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Design and Implementation of Iterative Learning Control for an Electro-Hydraulic Servo System

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Title Design and Implementation of Iterative Learning Control for an Electro-Hydraulic Servo System
 
Creator C, Naveen
B, Meenakshipriya
S, Sathiyavathi
A, Tony Thomas
 
Subject Closed loop control
Double acting hydraulic cylinder
Position control
Proportional integral derivative controller
Servo spool valve
 
Description 579-588
In order to produce an accurate movement of double-acting hydraulic cylinder of the Electro-Hydraulic Servo System
(EHSS), an Iterative Learning Controller (ILC) approach is implemented in this work. Nonlinearity and imprecision occurs
in the hydraulic systems because of friction. Traditional controllers are incapable of providing effective control performance
throughout the entire operating range and insufficient to handle repetitive task. To manage the repetitive task, a memorybased
learning control analysis is suitable. This research focuses to construct the ILC for governing the servo spool valve,
which is responsible for the hydraulic cylinder displacement. The proposed ILC consists of learning filter, learning gain and
robustness filter. Proportional, Integral and Derivative (PID) controller is devised to validate the outcome of ILC.
Controllers are constructed based on the system modelling. The effectiveness of the suggested controller is shown through
simulation and experimental findings. ILC provides an average of 50% minimal overshoot and settles 7 sec before the PID
controller is designed. Due to model uncertainty, PID controller results 0.2 sec better rise time than ILC. In ILC's
architecture objective function is designed to achieve minimal overshoot and quick settling of hydraulic cylinder. So, no
consideration is given to the error indices. These findings will help hydraulic stamping application, which requires the
accurate displacement of piston to avoid damage of work piece. These results show that the proposed controller achieves
desired outcome displacement of hydraulic cylinder.
 
Date 2023-05-09T08:18:36Z
2023-05-09T08:18:36Z
2023-05
 
Type Article
 
Identifier 0022-4456 (Print); 0975-1084 (Online)
http://nopr.niscpr.res.in/handle/123456789/61856
https://doi.org/10.56042/jsir.v82i05.1096
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source JSIR Vol.82(05) [May 2023]