Proactive fault finding in a 4/3-way direction control valve of a high pressure hydraulic system using the bond graph method with digital simulation

Athanasatos, Pavlos; Costopoulos, Theodore N.

doi:10.1016/j.mechmachtheory.2011.11.018

Cited by 28 publications

(37 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Secondly, the hydraulic actuator system has the coupling of several energy domains (mechanical, electrical, hydrodynamic, etc.) [28][29][30][31]. Moreover, traditional modeling methods such as transfer functions cannot meet the requirements of modeling a multi-input system.…”

Section: Dynamic Bond Graph Model Of the Systemmentioning

confidence: 99%

Theoretical and Experimental Analysis of the Hydraulic Actuator Used in the Active Reflector System

Xiao

Liu

Wang

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

In order to improve the control quality of the active reflector system which is used in the 500 m aperture spherical radio telescope (FAST) project, a study on hydraulic actuator is proposed. The dynamic performance of hydraulic actuator is due to the interaction of several physical phenomena. Modeling of such a system needs a unified approach to represent the nonlinear behavior characteristics. Bond graph model is ideal for this task. In addition, conventional PID control strategy cannot achieve the required accuracy and precision, so we combine grey prediction with PID control. Furthermore, a new adjustment mechanism is presented to change the grey step size, which is simple, automatic, less time-consuming, and efficient. Simulations and experiments on the actuator are carried out to evaluate the effectiveness of the proposed control method. In experiments, the velocity error is less than 0.05mm/s and the position error is less than 0.2mm. It shows the actuator meets the astronomical observation requirement totally.

show abstract

Section: Dynamic Bond Graph Model Of the Systemmentioning

confidence: 99%

Theoretical and Experimental Analysis of the Hydraulic Actuator Used in the Active Reflector System

Xiao

Liu

Wang

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…The dynamic response of a high pressure hydraulic system using bond graphs is examined by Barnard and Dransfield (1977), while Dransfield (1981) dealt with the application of bond graphs to hydraulic systems. The concept of using bond graphs for the study of faults and failures in hydraulic systems has been investigated by Athanasatos and Costopoulos (2011) where bond graph modeling is used to predict the response of a hydraulic system with irregular motion of its spool. In the area of maintenance, quality and reliability of industrial systems several works have been published: Zotos and Costopoulos (2012) examined precision maintenance whereas Siam et al (2012) examined the total quality management, Valarmathi and Chilambuchelvan (2012) investigated a wind turbine through a power quality analysis and Zotos and Costopoulos (2008) give specific orders for the increase of numerical stability and accuracy.…”

Section: Ajasmentioning

confidence: 99%

“…3, for modeling the power flow during motion to the right. More details of this modeling procedure may be found in Athanasatos and Costopoulos (2011).…”

Section: Hydraulic Cylinder and Equivalent Loadmentioning

confidence: 99%

See 1 more Smart Citation

Operational Fault Diagnosis in Industrial Hydraulic Systems Through Modeling the Internal Leakage of Its Components

Athanasatos¹

2013

American Journal of Applied Sciences

View full text Add to dashboard Cite

In this study, a model of a high pressure hydraulic system was developed using the bond graph method to investigate the effect of the internal leakage of its main components (pump, cylinder and 4/2 way valve) on the operational characteristics of the system under various loads. All the main aspects of the hydraulic circuit (like the internal leakages, the compressibility of the fluid, the hydraulic pressure drop, the inertia of moving masses and the friction of the spool) were taken into consideration. The results of this modeling were compared with the experimental data taken from the literature and from an actual test platform installed in the laboratory. Modeling and experimental data curves correlate very well in form, magnitude and response times for all the system's main parameters. This proves that the present method can be used to accurately model the response and operation of hydraulic systems and can thus be used for operational fault diagnosis in many cases, especially in simulating fault scenarios when the defective component is not obvious. This is very important in industrial production systems where unpredictable shutdowns of the hydraulic machinery have a considerable negative economic impact on cost.

show abstract

“…For the modeling of hydraulic systems through the bond graph method an in depth research has been done by Athanasatos and Costopoulos [7], Athanasatos et al [8], Barnard and Dransfield [9], Barnard [10], Dransfield [11], and Dransfield and Steki [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Verification of Fault Predictions in High Pressure Hydraulic Systems

Athanasatos¹,

Koulocheris²,

Costopoulos³

et al. 2014

MME

View full text Add to dashboard Cite

In this paper a model of a high pressure hydraulic system was developed to simulate the effect of increased internal leakages inside the hydraulic cylinder and the 4/2 way directional control valve and to calculate the main parameters of the hydraulic system under various loads through the use of leakage-simulating throttle valves. After the completion of modeling, the throttle valves that simulate the internal leakages were calibrated and a number of test runs were performed for the cases of normal operation and the operation with increased internal leakages. The theoretical predictions were compared against the experimental results from an actual hydraulic test platform installed in the laboratory. In all cases, modeling and experimental data curves correlate very well in form, magnitude and response times for all the system's main parameters. This proves that the present modeling can be used to accurately predict various faults in hydraulic systems, and can thus be used for proactive fault finding in many cases, especially when the defective component is not easily detected and obvious at first sight.

show abstract

Proactive fault finding in a 4/3-way direction control valve of a high pressure hydraulic system using the bond graph method with digital simulation

Cited by 28 publications

References 8 publications

Theoretical and Experimental Analysis of the Hydraulic Actuator Used in the Active Reflector System

Theoretical and Experimental Analysis of the Hydraulic Actuator Used in the Active Reflector System

Operational Fault Diagnosis in Industrial Hydraulic Systems Through Modeling the Internal Leakage of Its Components

Experimental Verification of Fault Predictions in High Pressure Hydraulic Systems

Contact Info

Product

Resources

About