Hydraulic Device for Simulation of Pressure Shocks

Lindák, S.; Majdan, Radoslav; Janoško, I.; Pap, Miroslav; Szabó, Mário

doi:10.2478/ata-2014-0010

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The determination of the individual components of the hydraulic device to assess the operation of the hydraulic pumps is based on the relations between authors Baroška (2012), Will et al (2011), Lindák et al (2014) and Sigloch (2009). Inner surface:…”

Section: Design Of Experimental Hydraulic Devicementioning

confidence: 99%

Design and Modeling of an Experimental Hydraulic Device

Tkáč

Halenár

Kosiba

2018

Multidisciplinary Aspects of Production Engineering

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The design of the experimental laboratory device is based on the construction of the hydraulic circuits of mobile devices. It is possible to ensure the repeatability of the flow characteristic measurements at the laboratory. This means that in the operating test it is possible to verify the flow characteristics of the hydraulic pump and these results are not affected by the change in the physical properties of the applied liquid. By comparing of the flow characteristics directly on the work equipment (mini-excavator, etc.), the disadvantage is the need for dismantling the hydraulic pump and its mounting on the laboratory device. In some working device removal is not possible, where dismantling is structurally difficult or is time consuming, which increases the cost of their operation.The proposed experimental laboratory device serves to verify the flow characteristics of the hydraulic pump and is also designed to be universal, to test external gear hydraulic pump and hydraulic pump with inclined plate.

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Section: Design Of Experimental Hydraulic Devicementioning

confidence: 99%

Design and Modeling of an Experimental Hydraulic Device

Tkáč

Halenár

Kosiba

2018

Multidisciplinary Aspects of Production Engineering

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“…This phenomenon is caused because the changes in the kinetic energy of liquids are converted into pressure changes. These are then spread in the form of waves in the liquids and may cause irreparable damage to the installation [ 2 ]. Some accumulators suffer from breakage, and parts of the accumulator body are ejected into the engine room, causing damage to the engine.…”

Section: Introductionmentioning

confidence: 99%

Anomaly Detection Based on Time Series Data of Hydraulic Accumulator

Park

Chakraborty²,

Vuong

et al. 2022

Sensors

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Although hydraulic accumulators play a vital role in the hydraulic system, they face the challenges of being broken by continuous abnormal pulsating pressure which occurs due to the malfunction of hydraulic systems. Hence, this study develops anomaly detection algorithms to detect abnormalities of pulsating pressure for hydraulic accumulators. A digital pressure sensor was installed in a hydraulic accumulator to acquire the pulsating pressure data. Six anomaly detection algorithms were developed based on the acquired data. A threshold averaging algorithm over a period based on the averaged maximum/minimum thresholds detected anomalies 2.5 h before the hydraulic accumulator failure. In the support vector machine (SVM) and XGBoost model that distinguish normal and abnormal pulsating pressure data, the SVM model had an accuracy of 0.8571 on the test set and the XGBoost model had an accuracy of 0.8857. In a convolutional neural network (CNN) and CNN autoencoder model trained with normal and abnormal pulsating pressure images, the CNN model had an accuracy of 0.9714, and the CNN autoencoder model correctly detected the 8 abnormal images out of 11 abnormal images. The long short-term memory (LSTM) autoencoder model detected 36 abnormal data points in the test set.

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