Real-time electro-hydraulic hybrid system for structural testing subjected to vibration and force loading

Shen, Gang; Zhu, Zhencai; Li, Xiang; Yu, Tang; Hou, Dongdong; Teng, Wenxiang

doi:10.1016/j.mechatronics.2015.10.009

Cited by 49 publications

(60 citation statements)

References 29 publications

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“…The weight had been downsized by 25%. Shen et al (2016) indicated that disadvantage of active vibration compensation systems is that energy is added to the hydraulic system via the actuator, which fundamentally worsens the stability of the entire system and, even with an inaccurately tuned regulator, can even lead to deterioration of the system's characteristics (under certain conditions, the amplitude of pressure fluctuations does not decrease, and even increases).…”

Section: Review Of Energy-saving Technologiesmentioning

confidence: 99%

Review of Energy-saving Technologies in Modern Hydraulic Drives

Karpenko

Bogdevičius

2017

Science - Future of Lithuania

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Abstract. This paper focuses on review of modern energysaving technologies in hydraulic drives. Described main areas of energy conservation in hydraulic drive (which in turn are divided into many under the directions) and was established the popularity of them. Reviewed the comparative analysis of efficiency application of various strategies for energy saving in a hydraulic drive. Based on the review for further research a combined method of realtime control systems with energysaving algorithms and regeneration unit -selected for maxing efficiency in hydraulic drive. Scientific papers (40 papers), what introduced in review, is not older than 15 years in the databases "Sciencedirect" and "Scopus".

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Section: Review Of Energy-saving Technologiesmentioning

confidence: 99%

Review of Energy-saving Technologies in Modern Hydraulic Drives

Karpenko

Bogdevičius

2017

Science - Future of Lithuania

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“…Electrohydraulic shaking table is a piece of the most important test equipment for replicating actual vibration situations in seismic tests and many other applications [1][2][3][4][5][6]. Multisupport, multidimension, and nonuniform excitation experiments have new requirements for shaking table array system in synchronous tracking control [2,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Differential Movement Synchronous Tracking Control Strategy of Double‐Shaking Table System Loading with Specimen

Wang

et al. 2018

Shock and Vibration

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Multisupport, multidimension, and nonuniform excitation seismic experiments have new requirements for shaking table array system in synchronous tracking control. Therefore, this article proposed a novel synchronous tracking strategy, differential movement synchronous tracking control (DMSTC) strategy, for double-shaking table system while taking the interaction between shaking tables and specimen into consideration. DMSTC Simulink model of the double-shaking table with specimen was established and simulations were conducted in various conditions. The results demonstrate the viability of the proposed DMSTC in that the frequency bandwidth of the double-shaking tables is expanded from 3.27 Hz to 64.57 Hz, the maximum value of differential movement synchronous error is decreased from 1.682 mm to 0.482 mm, and the maximum tracking errors of the two shaking tables decrease from 1.138 mm to 0.044 mm and from 1.030 mm to 0.497 mm, respectively.

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“…Construction machinery, especially the hydraulic excavator (HE), is widely used in transport and infrastructure, which can output a larger amount of power and consume a larger proportion of energy. Therefore, the energy saving and regeneration become the research hotspot to reduce the energy consumption and emissions [1][2][3][4][5]. The energy loss of the hydraulic system can be divided into two types: throttling loss and overflow loss.…”

Section: Introductionmentioning

confidence: 99%

Energy Regeneration Hydraulic System via a Relief Valve with Energy Regeneration Unit

et al. 2017

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Featured Application: This research aims to reduce the energy loss through the relief valve, especially in the systems where the system pressure is high or the overflow flow rate is large.Abstract: Relief valves are widely used in industrial machinery. Due to the outlet of the relief valve being connected to the tank, the pressure drop of the relief valve is frequently equal to the inlet pressure. Accordingly, the energy loss of the relief valve is very high in some cases and this will worsen with an increase in the rated pressure of the hydraulic system. In order to overcome the disadvantage of overflow energy loss in a relief valve, a hydraulic energy regeneration unit (HERU) is connected to the outlet of the relief valve to decrease the pressure drop between the inlet and outlet of the relief valve. The overflow loss, which is characterized by the pressure drop, can be reduced accordingly. The approach is to convert the overflow energy loss in hydraulic form and allow for release when needed. The configuration and working principle of the relief valve with HERU is introduced in this present study. The mathematical model is established to obtain the factors influencing the stability of the relief valve. The working pressure of the hydraulic accumulator (HA) is explored. Furthermore, the control process of the operating state of the HA is scheduled to decide whether to regenerate the energy via the HERU. The software AMESim is utilized to analyze the performance and characteristics of the relief valve with HERU. Following this, the test rig is built and used to verify the effectiveness of the proposed relief valve with HERU. The experimental results show that the relief valve with the HERU connected to its outlet can still achieve better pressure-regulating characteristics. The energy regeneration efficiency saved by the HA is up to 83.6%, with a higher pre-charge pressure of the HA. This indicates that the proposed structure of the relief valve with HERU can achieve a better performance and higher regeneration efficiency.

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Real-time electro-hydraulic hybrid system for structural testing subjected to vibration and force loading

Cited by 49 publications

References 29 publications

Review of Energy-saving Technologies in Modern Hydraulic Drives

Review of Energy-saving Technologies in Modern Hydraulic Drives

Differential Movement Synchronous Tracking Control Strategy of Double‐Shaking Table System Loading with Specimen

Energy Regeneration Hydraulic System via a Relief Valve with Energy Regeneration Unit

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