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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

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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

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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

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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

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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

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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

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

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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

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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

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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

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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

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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

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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

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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

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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

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Topics: Fluids, Stiction, Bubbles, Pressure, Dynamics (Mechanics), Surface roughness, Boundary layers, Boundary-value problems, Cavitation, Density

Proceedings Papers

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

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Topics: Energy consumption, Trenching machinery, Machinery, Actuators, Flow (Dynamics), Outflow, Hydraulic drive systems, Pumps, Combustion, Data acquisition systems

Journal citation

NARROW

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

Sensor Placement in a Hydraulic Drive System

A Hydraulically Controlled Multiple Buck Converter System

Advancements in the Control Strategy for Digital Hydraulically Driven Knee Exoskeleton

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

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

A Novel Design Concept of Digital Hydraulic Drive for Knee Exoskeleton

Hydraulic Control of a Buck Converter

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

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

A Hydraulic Piloting Concept of a Digital Cylinder Drive for Exoskeletons

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

A Combined Hydrostatic Hydrodynamic Bearing Based on Elastic Deformation

Fluid Stiction With Mechanical Contact: A Theoretical Model

Methodical Loss Reduction in Load Sensing Systems Based on Measurements

Energy Efficient Linear Drive Axis Using a Hydraulic Switching Converter

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

Modeling of a Fast Plate Type Hydraulic Check Valve

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

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

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