Modeling of an Excavator System - Semi Empirical Hydraulic Pump Model

Casoli, Paolo; Anthony, Alvin; Rigosi, Manuel

doi:10.4271/2011-01-2278

Cited by 18 publications

(10 citation statements)

References 3 publications

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“…There have also been efforts to develop empirical models. Possible losses in hydraulic systems were also accounted in input-output relations in the gray-box approach [49,54,55,58,59].…”

Section: Hydraulic System Modelingmentioning

confidence: 99%

A Review on Mechanical and Hydraulic System Modeling of Excavator Manipulator System

Yoon

2016

Journal of Construction Engineering

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A recent trend in the development of off-highway construction equipment, such as excavators, is to use a system model for model-based system design in a virtual environment. Also, control system design for advanced excavation systems, such as automatic excavators and hybrid excavators, requires system models in order to design and simulate the control systems. Therefore, modeling of an excavator is an important first step toward the development of advanced excavators. This paper reviews results of recent studies on the modeling of mechanical and hydraulic subsystems for the simulation, design, and control development of excavator systems. Kinematic and dynamic modeling efforts are reviewed first. Then, various approaches in the hydraulic system modeling are presented.

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“…There have also been efforts to develop empirical models. Possible losses in hydraulic systems were also accounted in input-output relations in the gray-box approach [49,54,55,58,59].…”

Section: Hydraulic System Modelingmentioning

confidence: 99%

A Review on Mechanical and Hydraulic System Modeling of Excavator Manipulator System

Yoon

2016

Journal of Construction Engineering

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“…The mathematical model of this device [13] has been added to the already developed mathematical model of a standard excavator. The mathematical model of the excavator was developed and validated as reported in [50][51][52][53][54]. The model is based on a lumped parameter approach and include the models of pump, directional flow control valves, hydraulic lines, kinematics of the front equipment.…”

Section: Introductionmentioning

confidence: 99%

Excavator hydraulic circuit solution to reduce dissipations and fuel consumption

et al. 2021

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In the field of mobile machine the research is mainly focused on solutions to reduce the energy dissipations and fuel consumptions being these machines mainly equipped with Diesel engines. This paper presents a solution for improving the performance of a traditional Load sensing flow sharing circuit. The solution concerns the insertion of a Load sensing signal conditioner (LSc), developed by Walvoil S.p.A., that permits to dynamically change the pressure drop across the directional valves. A careful control of this new component permits to obtain a reduction of the fuel consumption without changing the performance of the machine taking as reference a JCMAS duty cycle. This paper presents the mathematical model of a 9 ton excavator that was previously validated with tests carried out on both the single hydraulic and the excavator main components like pump and flow sharing valves. The LSc model was developed and added to the traditional hydraulic circuit. The model of the excavator hydraulic circuit with this new component has permitted to simulate the energy saving achievable in comparison with the traditional solution. The paper presents the relevance of a carefully control of this new device in order to maximize the performance. The physical prototyping of this device has been already developed and will be installed in a mobile machine to confirm the simulated performance.

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“…The component investigated in this paper has a key role in controlling the instantaneous displacement of an axial piston pump [7][8][9]. The authors have developed models of the pump [10] and of the hydraulic system for an excavator [11][12][13][14], where the pump with its displacement control is installed, a reliable model of the control permitted to correctly simulate the pump behavior during the transients that characterized the typical duty cycle of an excavator. To the best authors' knowledge, no experimental procedure is available in the open literature for the characterization of the viscous friction coefficient in such displacement controls.…”

Section: Introductionmentioning

confidence: 99%

Experimental Methods for Measuring the Viscous Friction Coefficient in Hydraulic Spool Valves

2021

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In hydraulic components, nonlinearities are responsible for critical behaviors that make it difficult to realize a reliable mathematical model for numerical simulation. With particular reference to hydraulic spool valves, the viscous friction coefficient between the sliding and the fixed body is an unknown parameter that is normally set a posteriori in order to obtain a good agreement with the experimental data. In this paper, two different methodologies to characterize experimentally the viscous friction coefficient in a hydraulic component with spool are presented. The two approaches are significantly different and are both based on experimental tests; they were developed in two distinct laboratories in different periods of time and applied to the same flow compensator of a pump displacement control. One of the procedures was carried out at the Fluid Power Research Laboratory of the Politecnico di Torino, while the other approach was developed at the University of Parma. Both the proposed methods reached similar outcomes; moreover, neither method requires the installation of a spool displacement transducer that can significantly affect the results.

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Modeling of an Excavator System - Semi Empirical Hydraulic Pump Model

Cited by 18 publications

References 3 publications

A Review on Mechanical and Hydraulic System Modeling of Excavator Manipulator System

A Review on Mechanical and Hydraulic System Modeling of Excavator Manipulator System

Excavator hydraulic circuit solution to reduce dissipations and fuel consumption

Experimental Methods for Measuring the Viscous Friction Coefficient in Hydraulic Spool Valves

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