Multi-class fault detection in electro-hydraulic servo systems using support vector machines

Sharifi, Siavash; Rezaei, Seyed Mehdi; Tivay, Ali; Soleymani, Farzan; Zareinejad, Mohammad

doi:10.1109/icrom.2016.7886855

Cited by 9 publications

(7 citation statements)

References 7 publications

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“…For example, Sharifi Figure 18 Common valve faults and their causes Figure 19 Common methods in fault diagnosis of electro-hydraulic valve extracted the step amplitude, the peak generation time, and the oscillation time in the pressure step curve generated by the system during the step process of the valve spool. The features under the normal working conditions and the leakage working conditions were analyzed in clusters through the neural network to identify the leakage fault, as depicted in Figure 20 [94,95]. In addition, the error of the fault identification is 30.2%.…”

Section: Data-based Fault Diagnosis Methodsmentioning

confidence: 99%

Research and Development of Electro-hydraulic Control Valves Oriented to Industry 4.0: A Review

Shen

Liu

et al. 2020

Chin. J. Mech. Eng.

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Electro-hydraulic control valves are key hydraulic components for industrial applications and aerospace, which controls electro-hydraulic motion. With the development of automation, digital technology, and communication technology, electro-hydraulic control valves are becoming more digital, integrated, and intelligent in order to meet the requirements of Industry 4.0. This paper reviews the state of the art development for electro-hydraulic control valves and their related technologies. This review paper considers three aspects of state acquisition through sensors or indirect acquisition technologies, control strategies along with digital controllers and novel valves, and online maintenance through data interaction and fault diagnosis. The main features and development trends of electro-hydraulic control valves oriented to Industry 4.0 are discussed.

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Section: Data-based Fault Diagnosis Methodsmentioning

confidence: 99%

Research and Development of Electro-hydraulic Control Valves Oriented to Industry 4.0: A Review

Shen

Liu

et al. 2020

Chin. J. Mech. Eng.

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“…In Equation (2), n is the number of moles of transferred electrons, f is the Faraday constant, and ∆G is the maximum thermodynamic work that can be obtained from the partition functions of the system using quantum computational calculations [30][31][32][33][34][35].…”

Section: Of 11mentioning

confidence: 99%

Predictive Modeling of Corrosion in Al/Mg Dissimilar Joint

et al. 2019

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In the absence of any abnormality (standard conditions), the gradient of any mechanical/thermodynamic stress would be intensified at the dissimilar joint due to an abrupt change in the chemical composition. This paper aims to investigate the effect of delocalizing this stress by imposing an optimum chemical gradient within the dissimilar joint. In this work, we computationally demonstrated that a homogenous distribution of magnesium atoms in the aluminum (100) structure with a specific chemical gradient could potentially reduce the susceptibility of the Mg/Al dissimilar joint towards micro-galvanic corrosion. This is achieved through the minimization of the work function gradient within the dissimilar joint.

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“…RO is considered to be the gold standard desalination technique [40][41][42][43][44][45][46][47][48][49]. However, recent attempts have not been successful to reduce the gap between the current RO technologies and MTES significantly [35].…”

Section: Introductionmentioning

confidence: 99%

Looking Beyond Energy Efficiency: An Applied Review of Water Desalination Technologies and an Introduction to Capillary-Driven Desalination

Ahmadvand

Abbasi

Azarfar

et al. 2019

Water

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Most notable emerging water desalination technologies and related publications, as examined by the authors, investigate opportunities to increase energy efficiency of the process. In this paper, the authors reason that improving energy efficiency is only one route to produce more cost-effective potable water with fewer emissions. In fact, the grade of energy that is used to desalinate water plays an equally important role in its economic viability and overall emission reduction. This paper provides a critical review of desalination strategies with emphasis on means of using low-grade energy rather than solely focusing on reaching the thermodynamic energy limit. Herein, it is argued that large-scale commercial desalination technologies have by-and-large reached their engineering potential. They are now mostly limited by the fundamental process design rather than process optimization, which has very limited room for improvement without foundational change to the process itself. The conventional approach toward more energy efficient water desalination is to shift from thermal technologies to reverse osmosis (RO). However, RO suffers from three fundamental issues: (1) it is very sensitive to high-salinity water, (2) it is not suitable for zero liquid discharge and is therefore environmentally challenging, and (3) it is not compatible with low-grade energy. From extensive research and review of existing commercial and lab-scale technologies, the authors propose that a fundamental shift is needed to make water desalination more affordable and economical. Future directions may include novel ideas such as taking advantage of energy localization, surficial/interfacial evaporation, and capillary action. Here, some emerging technologies are discussed along with the viability of incorporating low-grade energy and its economic consequences. Finally, a new process is discussed and characterized for water desalination driven by capillary action. The latter has great significance for using low-grade energy and its substantial potential to generate salinity/blue energy.

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Multi-class fault detection in electro-hydraulic servo systems using support vector machines

Cited by 9 publications

References 7 publications

Research and Development of Electro-hydraulic Control Valves Oriented to Industry 4.0: A Review

Research and Development of Electro-hydraulic Control Valves Oriented to Industry 4.0: A Review

Predictive Modeling of Corrosion in Al/Mg Dissimilar Joint

Looking Beyond Energy Efficiency: An Applied Review of Water Desalination Technologies and an Introduction to Capillary-Driven Desalination

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