Experimental Investigation Of Direct Drive Hydraulic Units Implemented In A Mining Loader

Turunen, Aleksi; Minav, Tatiana; Hänninen, Henri; Pietola, Matti

doi:10.1109/gfps.2018.8472393

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…But the DDH units did not have a negative effect on the excavator. To further investigate the performance of DDH, a comprehensive comparison was made between the efficiency of the DDH and the traditional load sensing system for mining loaders in the same year's paper [50], assuming that the two systems were previously installed in the same machine. Furthermore, the two system structures are illustrated in Fig.…”

Section: A Review Of Eha Development Used In Engineering Machinerymentioning

confidence: 99%

A review on integral evolution of electro-hydraulic actuation in three momentous domains: aerospace, engineering machinery, and robotics

Liu,

SUN,

Yue

et al. 2024

Fourth International Conference on Mechanical Engineering, Intelligent Manufacturing, and Automation Technology (MEMAT 2023)

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The valve-controlled and pump-controlled hydraulic technology are both extensively used in hydraulic equipment nowadays, but the valve-controlled hydraulic technology has obvious shortcomings such as the lower power utilization rate due to the inevitable throttling and overflow losses. Pump-controlled hydraulic technology can enhance the efficiency of the entire hydraulic system owing to eliminate these energy losses and overcome the defects of valve-controlled technology. Electro-hydraulic actuator (EHA) is an archetypal pump control system with the huge advantages of high power-to-weight ratio, low energy consumption and compact structure. As a consequence, research on EHA has become a hot topic in the field of fluid power transmission and control by degrees. To date, many predecessors have conducted indepth exploration on the investigation related to EHA. However, the relevant literatures are extremely scattered, and the research directions of these papers are unequal so that it is quite necessary and meaningful to classify and summarize the whole development history of EHA. This review mainly introduces the evolvement of EHA in the three major fields that include aerospace, engineering machinery and robotics from the origin to the current, aiming at clarifying underlying issues and challenges in the study and application of EHA and discussing the further development tendency of this technology. The outlining content gathered in this document not only will be a valuable comprehensive source of information concerning EHA to scholars, but also provides a forceful reference for future studies with regard to high-power density and energy-efficient hydraulic technique.

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Section: A Review Of Eha Development Used In Engineering Machinerymentioning

confidence: 99%

A review on integral evolution of electro-hydraulic actuation in three momentous domains: aerospace, engineering machinery, and robotics

Liu,

SUN,

Yue

et al. 2024

Fourth International Conference on Mechanical Engineering, Intelligent Manufacturing, and Automation Technology (MEMAT 2023)

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“…Simulations and experiments of DDH systems implemented within some of the utility attachments, such as hydraulic crane [12], show promising results, especially in those cases where regeneration of kinetic and potential energy is possible. Prototype testing on an existing mining loader has shown that the overall efficiency of the direct driven hydraulic system can be much higher (up to 50%), with minimum steady-state control error achieved when paired with the fuzzy proportional-integral (fuzzy PID) controller [13]. Fuzzy logic in combination with sliding model control has also been proposed in [14] to account for inherent nonlinearities of hydraulic actuator dynamic model.…”

Section: Introductionmentioning

confidence: 99%

Direct Driven Hydraulic System for Skidders

et al. 2022

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This paper investigates potential uses of a novel direct driven electro-hydraulic systems for articulated forestry tractors (skidders), due to these systems having notably higher energy efficiencies compared to classical electro-hydraulic systems that are currently being used in skidders for steering, lifting the front and the rear plate, as well as for operating the double-drum winch. A detailed analysis of the skidder rear plate mechanism is carried out, and static force profiles of hydraulic cylinders are obtained for the rear plate based on mechanism dynamics and measurement data from the literature. Thus, obtained results have been used to emulate the real-life force profiles in laboratory experiments featuring both the classical and the proposed direct driven hydraulic systems for the purpose of comparative analysis of their energy and fuel efficiency. These results are subsequently used to estimate the skidder fuel consumption and possible fuel savings over the entire vehicle life span for the realistic vehicle utilisation scenario. The main result is that fuel consumption can be reduced up to five times in the case of direct driven hydraulic system, thus effectively resulting in return of investment period of about four years in the case of skidder being retrofitted with direct driven hydraulic system.

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“…To reduce the system complexity or achieve high control performance, systems with double pumps and triple pumps driven by a servo motor were proposed to control the asymmetric cylinder, and a series of studies were carried out to verify their performance [11][12][13][14][15][16]. In our previous studies [17][18][19][20][21], the double pump systems were introduced into a micro-excavator and a mining loader and the results showed that the energy efficiency of off-road machinery can be improved significantly by applying the proposed systems.…”

Section: Introductionmentioning

confidence: 99%

Control and Performance Analysis of Variable Speed Pump-Controlled Asymmetric Cylinder Systems under Four-Quadrant Operation

Zhang

Minav

2020

Actuators

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Since the energy crisis, the further development of a variable speed pump-controlled hydraulic system driven by an electric machine has attracted increasing attention during the past few years. As a response to this, an innovative double pump-controlled asymmetric cylinder system (DPC) and its control method are proposed in this study. The purpose of this study is to investigate the performance of two variable speed pump-controlled systems for asymmetric cylinders under a four-quadrant operating condition, in comparison with single pump control (SPC). The four-quadrant operating principles of the two systems are analyzed by simulation. Simulation models for both systems are introduced, and a position control method is proposed, with a tracking differentiator and speed feedforward, plus proportional-integral-derivative (PID) for four-quadrant operation. The DPC model was validated with the measurement of a crane. The simulations using the validated model were performed with a position reference and a varying load (four-quadrant operating arm of an excavator). The results demonstrated that the velocity fluctuation is eliminated by using the DPC instead of the SPC, and the position control performance of the DPC is better compared to the SPC, although the energy efficiency decreases slightly. Hence, the proposed DPC and its position control method are feasible for the four-quadrant operation of asymmetric cylinders.

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Experimental Investigation Of Direct Drive Hydraulic Units Implemented In A Mining Loader

Cited by 3 publications

References 3 publications

A review on integral evolution of electro-hydraulic actuation in three momentous domains: aerospace, engineering machinery, and robotics

A review on integral evolution of electro-hydraulic actuation in three momentous domains: aerospace, engineering machinery, and robotics

Direct Driven Hydraulic System for Skidders

Control and Performance Analysis of Variable Speed Pump-Controlled Asymmetric Cylinder Systems under Four-Quadrant Operation

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