Design of Dynamic and Efficient Hydraulic Systems Around a Simple Hydraulic Grid

“…The simplified schematic of HHEC is shown in Figure 1 [25, 26]. Common pressure rail (CPR) is composed of high pressure pipeline and low pressure pipeline, which is similar to the grid system that is composed of high-voltage line and low-voltage line [27].…”

Section: Machine Descriptionmentioning

confidence: 99%

Energy‐Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail

Shen

Jiang

et al. 2013

The Scientific World Journal

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Energy-saving research of excavators is becoming one hot topic due to the increasing energy crisis and environmental deterioration recently. Hydraulic hybrid excavator based on common pressure rail (HHEC) provides an alternative with electric hybrid excavator because it has high power density and environment friendly and easy to modify based on the existing manufacture process. This paper is focused on the fuel consumption of HHEC and the actuator dynamic response to assure that the new system can save energy without sacrificing performance. Firstly, we introduce the basic principle of HHEC; then, the sizing process is presented; furthermore, the modeling period which combined mathematical analysis and experiment identification is listed. Finally, simulation results show that HHEC has a fast dynamic response which can be accepted in engineering and the fuel consumption can be reduced 21% to compare the original LS excavator and even 32% after adopting another smaller engine.

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“…The proposal of the common pressure rail (CPR) technology provides a good solution for improving the efficiency of hydraulic systems. Compared with the traditional hydraulic powertrain, it has great advantages in terms of cost, flexibility, and controllability [3, 4]. The research results of Celestine N. Okoye, Achten, Shen et al fully confirmed the outstanding advantages of the CPR system and new hydraulic transformer (NHT) in energy saving.…”

Section: Introductionmentioning

confidence: 99%

Speed tracking control for hydraulic transformer system based on active regulating common pressure rail

Shen

2020

IET Control Theory & Appl

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This study investigates the speed tracking control problem for the new hydraulic transformer controlled system based on the active regulating common pressure rail with both input delay and strong interference. Firstly, the Pade approximation approach is adopted to approximate and compensate for the input delay of the valve plate rotating controlled by the hydraulic swing motor. Then, the Levant filter is introduced to solve the ‘explosion of complexity’ caused by repeated differentiation of the virtual control signals, and the compensation mechanism is constructed to compensate for the filtering errors. Besides, due to the strong non‐linear characteristics of the proposed system, the pi‐sigma fuzzy neural network is employed as the function approximator to address the non‐linear terms. Based on finite‐time command control technology and the barrier Lyapunov functionals, a robust controller is synthesised to ensure a better error convergence performance while without violating the state constraint. Finally, the effectiveness of the controller is verified by comparison with the traditional control method and simulation result.

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Design of Dynamic and Efficient Hydraulic Systems Around a Simple Hydraulic Grid

Cited by 5 publications

References 2 publications

Agricultural Industry Advanced Vehicle Technology: Benchmark Study for Reduction in Petroleum Use

Agricultural Industry Advanced Vehicle Technology: Benchmark Study for Reduction in Petroleum Use

Energy‐Saving Analysis of Hydraulic Hybrid Excavator Based on Common Pressure Rail

Speed tracking control for hydraulic transformer system based on active regulating common pressure rail

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