Accurate Position Regulation of an Electro-Hydraulic Actuator via Uncertainty Compensation-Based Controller

Instead of experiment, this paper builds a virtual model of the electro-hydraulic actuator (EHA) thought an Amesim software to evaluate the control response. The main feature of the EHA is to use the closed-loop circuit to reduce the size and oil volume as well as to eliminate the pressure loss caused by the orifice area of the valves. Firstly, the mathematical model of the EHA is established. Secondly, based on this model, an adaptive fuzzy sliding mode controller (AFSMC) is then designed to control the accurate position of the piston. In this control strategy, the system parameters are considered unknown, and they are lumped into two unknown time varying functions. An approximate technique is used to express one of the unknown functions as a finite combination of the basis function. In addition, a fuzzy logic inference mechanism is utilized for realizing a hitting control law to remove completely the chattering problem from the conventional sliding mode control. Then, the Lyapunov stability theorem is utilized to find the adaptive laws for updating the coefficients in the approximate series and turning the fuzzy parameter.

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Optimization of PID Parameters in Electro-Hydraulic Actuator System Using Genetic Algorithm

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.592-594.2229 ◽

2014 ◽

Vol 592-594 ◽

pp. 2229-2233

Author(s):

Kiran Bellad ◽

Somashekhar S. Hiremath ◽

M. Singaperumal ◽

S. Karunanidhi

Keyword(s):

Genetic Algorithm ◽

Pid Control ◽

Hydraulic System ◽

Position Control ◽

Control Method ◽

Position Tracking ◽

Proportional Integral Derivative ◽

Hydraulic Actuator ◽

Actuator System ◽

Accurate Position

Electro-Hydraulic Actuator (EHA) replaces centralized hydraulic system by a local compact actuator system. It is gaining more attention due to its compactness and reliability. The control method should be appropriate to achieve accurate position control and stability. The EHA system model is developed in AMESim software and Proportional-Integral-Derivative (PID) control is used for position tracking of the cylinder. Design Exploration facility of AMESim software provides a platform to optimize PID parameters using Genetic Algorithm (GA). Simulation results show that position tracking with no overshoot and less settling time.

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Accurate Position and Attitude Determination in a Jammed or Spoofed Environment Using an Uncalibrated Multi-Antenna-System

Proceedings of the 2018 International Technical Meeting of The Institute of Navigation ◽

10.33012/2018.15589 ◽

2018 ◽

Author(s):

Soeren Zorn ◽

Tobias Bamberg ◽

Michael Meurer

Keyword(s):

Attitude Determination ◽

Antenna System ◽

Accurate Position

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Application Fuzzy Logic System for Accurate Sheet Trim Shower Position

ACMIT Proceedings ◽

10.33555/acmit.v3i1.43 ◽

2019 ◽

Vol 3 (1) ◽

pp. 186-192

Author(s):

Yudi Wibawa

Keyword(s):

Fuzzy Logic ◽

Fuzzy Logic Controller ◽

Dc Motor ◽

Automation System ◽

Paper Making ◽

System A ◽

Accurate Position ◽

And Performance ◽

Better Than ◽

Logic System

This paper aims to study for accurate sheet trim shower position for paper making process. An accurate position is required in an automation system. A mathematical model of DC motor is used to obtain a transfer function between shaft position and applied voltage. PID controller with Ziegler-Nichols and Hang-tuning rule and Fuzzy logic controller for controlling position accuracy are required. The result reference explains it that the FLC is better than other methods and performance characteristics also improve the control of DC motor.

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Control of Vibrations due to Moving Loads on Suspension Bridges

Nonlinear Analysis Modelling and Control ◽

10.15388/na.2006.11.3.14749 ◽

2006 ◽

Vol 11 (3) ◽

pp. 293-318 ◽

Cited By ~ 4

Author(s):

M. Zribi ◽

N. B. Almutairi ◽

M. Abdel-Rohman

Keyword(s):

Bridge Deck ◽

Suspension Bridge ◽

Lyapunov Theory ◽

Dynamic Responses ◽

Suspension Bridges ◽

Control Force ◽

Moving Loads ◽

Hydraulic Actuator ◽

Long Span ◽

Suspended Cables

The flexibility and low damping of the long span suspended cables in suspension bridges makes them prone to vibrations due to wind and moving loads which affect the dynamic responses of the suspended cables and the bridge deck. This paper investigates the control of vibrations of a suspension bridge due to a vertical load moving on the bridge deck with a constant speed. A vertical cable between the bridge deck and the suspended cables is used to install a hydraulic actuator able to generate an active control force on the bridge deck. Two control schemes are proposed to generate the control force needed to reduce the vertical vibrations in the suspended cables and in the bridge deck. The proposed controllers, whose design is based on Lyapunov theory, guarantee the asymptotic stability of the system. The MATLAB software is used to simulate the performance of the controlled system. The simulation results indicate that the proposed controllers work well. In addition, the performance of the system with the proposed controllers is compared to the performance of the system controlled with a velocity feedback controller.

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