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Proceedings Papers

The Connection Between Sliding Mode Analysis and Singular Perturbation Theory for Modeling Fast Hydraulically Fed-Back Switching Valves

Philipp Zagar, Rudolf Scheidl
Proc. ASME. FPMC2022, BATH/ASME 2022 Symposium on Fluid Power and Motion Control, V001T01A020, September 14–16, 2022
Paper No: FPMC2022-89105
DOI: https://doi.org/10.1115/FPMC2022-89105
View Paper titled, The Connection Between Sliding Mode Analysis and Singular Perturbation Theory for Modeling Fast Hydraulically Fed-Back Switching Valves
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Topics: Hydraulics, Modeling, Perturbation theory, Valves, Dynamics (Mechanics), System dynamics, Approximation, Design, Pulse width modulation, Topology
Proceedings Papers

Sensor Placement in a Hydraulic Drive System

Gudrun Mikota, Rudolf Scheidl, Rainer Haas
Proc. ASME. FPMC2022, BATH/ASME 2022 Symposium on Fluid Power and Motion Control, V001T01A037, September 14–16, 2022
Paper No: FPMC2022-89855
DOI: https://doi.org/10.1115/FPMC2022-89855
View Paper titled, Sensor Placement in a Hydraulic Drive System
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Topics: Fluid structure interaction, Hydraulic drive systems, Modal analysis, Sensor placement
Proceedings Papers

A Hydraulically Controlled Multiple Buck Converter System

Rudolf Scheidl, Philipp Zagar, Helmut Kogler
Proc. ASME. FPMC2022, BATH/ASME 2022 Symposium on Fluid Power and Motion Control, V001T01A011, September 14–16, 2022
Paper No: FPMC2022-88957
DOI: https://doi.org/10.1115/FPMC2022-88957
View Paper titled, A Hydraulically Controlled Multiple Buck Converter System
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Topics: Cycles, Hydraulic control, Pipes, Servomechanisms, Stress, Valves
Proceedings Papers

Advancements in the Control Strategy for Digital Hydraulically Driven Knee Exoskeleton

Rituraj Rituraj, Rudolf Scheidl
Proc. ASME. FPMC2022, BATH/ASME 2022 Symposium on Fluid Power and Motion Control, V001T01A006, September 14–16, 2022
Paper No: FPMC2022-88563
DOI: https://doi.org/10.1115/FPMC2022-88563
View Paper titled, Advancements in the Control Strategy for Digital Hydraulically Driven Knee Exoskeleton
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Topics: Exoskeleton devices, Hydraulic drive systems, Knee
Proceedings Papers

An Improved Elastic and Non-Contact Smart Sealing Concept for Digital Micro Hydraulic Valves

Matthias Scherrer, Rudolf Scheidl
Proc. ASME. FPMC2022, BATH/ASME 2022 Symposium on Fluid Power and Motion Control, V001T01A036, September 14–16, 2022
Paper No: FPMC2022-89847
DOI: https://doi.org/10.1115/FPMC2022-89847
View Paper titled, An Improved Elastic and Non-Contact Smart Sealing Concept for Digital Micro Hydraulic Valves
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Topics: Sealing (Process), Valves, Deformation, Pressure, Deflection, Design, Engineering prototypes, Feedback, Finite element methods, Finite element model
Journal Articles

Sliding Mode Analysis of a Counterbalance Valve Induced Instability in an Electrohydraulic Drive

Philipp Zagar, Rudolf Scheidl
Journal: Journal of Dynamic Systems, Measurement, and Control
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. April 2022, 144(4): 041004.
Paper No: DS-21-1166
DOI: https://doi.org/10.1115/1.4053342
Published Online: January 25, 2022
View Article titled, Sliding Mode Analysis of a Counterbalance Valve Induced Instability in an Electrohydraulic Drive
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Topics: Dynamics (Mechanics), Pistons, Stability, Valves, Pressure, Flow (Dynamics)
Proceedings Papers

A Novel Design Concept of Digital Hydraulic Drive for Knee Exoskeleton

Rituraj Rituraj, Rudolf Scheidl, Peter Ladner, Martin Lauber
Proc. ASME. FPMC2021, ASME/BATH 2021 Symposium on Fluid Power and Motion Control, V001T01A012, October 19–21, 2021
Paper No: FPMC2021-68590
DOI: https://doi.org/10.1115/FPMC2021-68590
View Paper titled, A Novel Design Concept of Digital Hydraulic Drive for Knee Exoskeleton
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Topics: Design, Exoskeleton devices, Hydraulic drive systems, Knee
Proceedings Papers

Hydraulic Control of a Buck Converter

Rudolf Scheidl
Proc. ASME. FPMC2021, ASME/BATH 2021 Symposium on Fluid Power and Motion Control, V001T01A022, October 19–21, 2021
Paper No: FPMC2021-68682
DOI: https://doi.org/10.1115/FPMC2021-68682
View Paper titled, Hydraulic Control of a Buck Converter
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Topics: Hydraulic control
Proceedings Papers

Simulation Study of Permanent Magnetic Actuation for a Hydraulic Valve With Hysteresis Response Behavior

Matthias Scherrer, Erwin Hauser, Rudolf Scheidl
Proc. ASME. FPMC2020, BATH/ASME 2020 Symposium on Fluid Power and Motion Control, V001T01A011, September 9–11, 2020
Paper No: FPMC2020-2724
DOI: https://doi.org/10.1115/FPMC2020-2724
View Paper titled, Simulation Study of Permanent Magnetic Actuation for a Hydraulic Valve With Hysteresis Response Behavior
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Topics: Simulation, Valves, Manufacturing, Finite element analysis, Friction, Magnetic fields, Permanent magnets, Bearings, Buckling, Circuit design
Proceedings Papers

Optimization of a Snap Through Spring for a Hydraulic Valve With Hysteresis Response Behavior

Matthias Scherrer, Rudolf Scheidl, Bernhard Manhartsgruber
Proc. ASME. FPMC2019, ASME/BATH 2019 Symposium on Fluid Power and Motion Control, V001T01A038, October 7–9, 2019
Paper No: FPMC2019-1680
DOI: https://doi.org/10.1115/FPMC2019-1680
View Paper titled, Optimization of a Snap Through Spring for a Hydraulic Valve With Hysteresis Response Behavior
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Topics: Optimization, Springs, Valves, Design, Buckling, Displacement, Cantilever beams, Fatigue, Finite element model, Genetic algorithms
Proceedings Papers

A Hydraulic Piloting Concept of a Digital Cylinder Drive for Exoskeletons

Rudolf Scheidl, Simon Mittlböck
Proc. ASME. FPMC2018, BATH/ASME 2018 Symposium on Fluid Power and Motion Control, V001T01A040, September 12–14, 2018
Paper No: FPMC2018-8875
DOI: https://doi.org/10.1115/FPMC2018-8875
View Paper titled, A Hydraulic Piloting Concept of a Digital Cylinder Drive for Exoskeletons
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Topics: Cylinders, Exoskeleton devices, Valves, Pressure, Design, Flow (Dynamics), Computer simulation, Feedback, Switches, Weight (Mass)
Proceedings Papers

Simulation Study of a Digital Hydraulic Drive for a Knee Joint Exoskeleton

Eva Holl, Rudolf Scheidl, Sulaymon Eshkabilov
Proc. ASME. FPMC2017, ASME/BATH 2017 Symposium on Fluid Power and Motion Control, V001T01A005, October 16–19, 2017
Paper No: FPMC2017-4220
DOI: https://doi.org/10.1115/FPMC2017-4220
View Paper titled, Simulation Study of a Digital Hydraulic Drive for a Knee Joint Exoskeleton
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Topics: Exoskeleton devices, Hydraulic drive systems, Knee, Simulation, Cylinders, Damping, Engineering prototypes, Hydraulic control, Motion control, Power density
Proceedings Papers

A Combined Hydrostatic Hydrodynamic Bearing Based on Elastic Deformation

Christoph Gradl, Rudolf Scheidl
Proc. ASME. FPNI2016, 9th FPNI Ph.D. Symposium on Fluid Power, V001T01A014, October 26–28, 2016
Paper No: FPNI2016-1520
DOI: https://doi.org/10.1115/FPNI2016-1520
View Paper titled, A Combined Hydrostatic Hydrodynamic Bearing Based on Elastic Deformation
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Topics: Bearings, Deformation, Hydrostatics, Finite element analysis, Leakage, Pressure, Cylinders, Design engineering, Fluid structure interaction, Friction
Proceedings Papers

Fluid Stiction With Mechanical Contact: A Theoretical Model

Rudolf Scheidl, Hu Zhidong
Proc. ASME. FPMC2016, BATH/ASME 2016 Symposium on Fluid Power and Motion Control, V001T01A033, September 7–9, 2016
Paper No: FPMC2016-1769
DOI: https://doi.org/10.1115/FPMC2016-1769
View Paper titled, Fluid Stiction With Mechanical Contact: A Theoretical Model
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Topics: Fluids, Stiction, Bubbles, Pressure, Dynamics (Mechanics), Surface roughness, Boundary layers, Boundary-value problems, Cavitation, Density
Proceedings Papers

Methodical Loss Reduction in Load Sensing Systems Based on Measurements

Arnold Hießl, Rudolf Scheidl
Proc. ASME. FPMC2016, BATH/ASME 2016 Symposium on Fluid Power and Motion Control, V001T01A035, September 7–9, 2016
Paper No: FPMC2016-1771
DOI: https://doi.org/10.1115/FPMC2016-1771
View Paper titled, Methodical Loss Reduction in Load Sensing Systems Based on Measurements
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Topics: Stress, Actuators, Pumps, Energy dissipation, Machinery, Trenching machinery, Circuits, Cylinders, Displacement, Emissions
Journal Articles

Energy Efficient Linear Drive Axis Using a Hydraulic Switching Converter

Helmut Kogler, Rudolf Scheidl
Journal: Journal of Dynamic Systems, Measurement, and Control
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. September 2016, 138(9): 091010.
Paper No: DS-15-1366
DOI: https://doi.org/10.1115/1.4033412
Published Online: June 8, 2016
View Article titled, Energy Efficient Linear Drive Axis Using a Hydraulic Switching Converter
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Topics: Cylinders, Flow (Dynamics), Pipes, Pistons, Pressure, Stress, Valves, Engineering prototypes, Secondary cells, Fluidized bed combustion
Journal Articles

A Combined Variable Displacement–Digital Cylinder Hydraulic Drive for Large Presses With High Operating Frequencies

Florian Messner, Rudolf Scheidl, Rainer Haas, Hubert Gattringer, Klemens Springer
Journal: Journal of Dynamic Systems, Measurement, and Control
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. July 2016, 138(7): 074502.
Paper No: DS-14-1546
DOI: https://doi.org/10.1115/1.4033105
Published Online: May 4, 2016
View Article titled, A Combined Variable Displacement–Digital Cylinder Hydraulic Drive for Large Presses With High Operating Frequencies
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Topics: Cylinders, Displacement, Hydraulic drive systems, Power presses, Pressure, Pumps, Valves, Feedforward control, Stress, Flow (Dynamics)
Journal Articles

Modeling of a Fast Plate Type Hydraulic Check Valve

Eugenio Leati, Christoph Gradl, Rudolf Scheidl
Journal: Journal of Dynamic Systems, Measurement, and Control
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. June 2016, 138(6): 061002.
Paper No: DS-14-1554
DOI: https://doi.org/10.1115/1.4032826
Published Online: March 29, 2016
View Article titled, Modeling of a Fast Plate Type Hydraulic Check Valve
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Topics: Valves, Pressure, Stiction, Dynamics (Mechanics), Flow (Dynamics)
Journal Articles

An Approximate Computational Method for the Fluid Stiction Problem of Two Separating Parallel Plates With Cavitation

Rudolf Scheidl, Christoph Gradl
Journal: Journal of Fluids Engineering
Article Type: Research-Article
J. Fluids Eng. June 2016, 138(6): 061301.
Paper No: FE-15-1407
DOI: https://doi.org/10.1115/1.4032299
Published Online: February 17, 2016
View Article titled, An Approximate Computational Method for the Fluid Stiction Problem of Two Separating Parallel Plates With Cavitation
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Topics: Cavitation, Fluids, Pressure, Stiction
Proceedings Papers

Energy Consumption and Efficiency Measurements of Different Excavators: Does Hybridization Pay?

Arnold Hießl, Rudolf Scheidl
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A037, October 12–14, 2015
Paper No: FPMC2015-9568
DOI: https://doi.org/10.1115/FPMC2015-9568
View Paper titled, Energy Consumption and Efficiency Measurements of Different Excavators: Does Hybridization Pay?
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Topics: Energy consumption, Trenching machinery, Machinery, Actuators, Flow (Dynamics), Outflow, Hydraulic drive systems, Pumps, Combustion, Data acquisition systems