Pulsating characteristic of the hydraulic hybrid vehicle system with pipeline effect

Chen, Yanli; Liu, Shun An; Jiang, Jihai; Shang, Tao; Zhang, Yuankun; Sui, Hang

doi:10.1177/0954406214562996

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…25 However, the noise and vibration level in the hydrostatic system can be minimized using hydraulic accumulator in series. 26,21 In spite of that, the need for incorporating the cushioning model is apparent from the comparison.…”

Section: Model Validationmentioning

confidence: 99%

Actuation dynamic modeling and characterization of an electrohydraulic system

Das

Mishra

Saha

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part I:

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The physical model of an electrohydraulic actuation system with pressure-reducing cylinder end cushioning has been obtained. In order to arrive at the closure of the model, experimental models for actuator friction and the characteristics of the relief, non-return and proportional valves have been constructed. The variation in discharge through the proportional valve with both pressure and command signal has been modeled by training a neural network with experimental data. For the characterization of the discharge through the proportional valve, besides square root of the pressure drop in each metered orifice, polynomial forms of command signal for the discharge coefficients have been used. Such a direct characterization of the discharge with the command signal eliminates the orifice opening as an intermediate variable. A simple friction model that retains all the features of the existing complex models has been developed. Parameters such as maximum dynamic friction and the corresponding velocity have been introduced for this purpose. All these nonlinear subsystem models have been integrated together in MATLAB/Simulink frame to predict the actuation dynamics. The variations in the predicted and experimental displacements of the piston against different command signals have been found to be quite close to each other.

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Section: Model Validationmentioning

confidence: 99%

Actuation dynamic modeling and characterization of an electrohydraulic system

Das

Mishra

Saha

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part I:

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“…1 Hydraulic transformer, as a special power conversion device, can regulate system pressure without throttling loss, and has the potential to propose new hydraulic hybrid power system and improve the efficiency of hydraulic system. 2–7 Therefore, hydraulic transformer has been widely concerned in recent years.…”

Section: Introductionmentioning

confidence: 99%

Four-port hydraulic transformer with inlet and outlet equal flow and its flow characteristics

Zhang

Zhou

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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Without changing the original valve control hydraulic system, a kind of hydraulic transformer, called four-port hydraulic transformer (FHT), is proposed to recover the energy loss caused by system throttling. The remarkable feature of FHT is that the flow rate at inlet and outlet ports are equal. This means that FHT can be connected into the load circuit of hydraulic system to recovery energy without refreshing flow rate. This paper investigates the flow characteristics of FHT, including instantaneous flow rates, average flow rates and flow pulsations in each port. The relationships between the structure of port plate and the flow characteristics are given. The variation rule of number of plungers connected to four ports is shown, and the relationship between the variation and the flow pulsation is revealed. The simulation results show that the flow rates and displacements of symmetrical ports are same, and the instantaneous flow rate of symmetrical ports has the same rule. The results also show the frequent changes of the number of plungers connected with each port lead to more flow jump points in instantaneous curves, and the jump point is the basic cause of its loud noise. The test shows that the flow rates of measurement data of the experiment are very close to the theoretical analysis, proved the theoretical analysis of flow characteristics for FHT are appropriate and reasonable, which has a certain reference for the development and energy-saving application for FHT.

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Pulsating characteristic of the hydraulic hybrid vehicle system with pipeline effect

Cited by 2 publications

References 20 publications

Actuation dynamic modeling and characterization of an electrohydraulic system

Actuation dynamic modeling and characterization of an electrohydraulic system

Four-port hydraulic transformer with inlet and outlet equal flow and its flow characteristics

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