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Daniel B. Roemer
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Journal Articles

Discrete Linear Time Invariant Analysis of Digital Fluid Power Pump Flow Control

Per Johansen, Daniel B. Roemer, Torben O. Andersen, Henrik C. Pedersen
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. October 2017, 139(10): 101007.
Paper No: DS-16-1005
https://doi.org/10.1115/1.4036554
Published Online: June 28, 2017
View Article titled, Discrete Linear Time Invariant Analysis of Digital Fluid Power Pump Flow Control
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Topics: Displacement, Flow (Dynamics), Flow control, Fluids, Pumps, Valves, Approximation, Control equipment, Stress, Design
Proceedings Papers

A Motion Observer With On-Line Parameter Estimation for Moving-Coil Based Digital Valves in Digital Displacement Machines

Christian Noergaard, Michael M. Bech, Daniel B. Roemer
Proc. ASME. FPNI2016, 9th FPNI Ph.D. Symposium on Fluid Power, V001T01A029, October 26–28, 2016
Publisher: American Society of Mechanical Engineers
Paper No: FPNI2016-1543
https://doi.org/10.1115/FPNI2016-1543
View Paper titled, A Motion Observer With On-Line Parameter Estimation for Moving-Coil Based Digital Valves in Digital Displacement Machines
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Topics: Displacement, Machinery, Parameter estimation, Valves, Actuators, Dynamics (Mechanics), Electromotive force, Engineering prototypes, Sensors
Proceedings Papers

Analysis of the Thermo-Viscous Effect on Friction and Energy Dissipation in Oil Lubricated Interfaces

Per Johansen, Daniel B. Roemer, Torben O. Andersen, Henrik C. Pedersen
Proc. ASME. FPNI2016, 9th FPNI Ph.D. Symposium on Fluid Power, V001T01A034, October 26–28, 2016
Publisher: American Society of Mechanical Engineers
Paper No: FPNI2016-1554
https://doi.org/10.1115/FPNI2016-1554
View Paper titled, Analysis of the Thermo-Viscous Effect on Friction and Energy Dissipation in Oil Lubricated Interfaces
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Topics: Energy dissipation, Friction, Fluids, Tribology, Computer simulation, Lubrication, Approximation, Design, Film thickness, Lubricants
Proceedings Papers

Influence of the Lubricant Thermo-Piezo-Viscous Property on Hydrostatic Bearings in Oil Hydraulics

Per Johansen, Daniel B. Roemer, Torben O. Andersen, Henrik C. Pedersen
Proc. ASME. FPNI2016, 9th FPNI Ph.D. Symposium on Fluid Power, V001T01A031, October 26–28, 2016
Publisher: American Society of Mechanical Engineers
Paper No: FPNI2016-1551
https://doi.org/10.1115/FPNI2016-1551
View Paper titled, Influence of the Lubricant Thermo-Piezo-Viscous Property on Hydrostatic Bearings in Oil Hydraulics
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Topics: Bearings, Hydraulics, Hydrostatics, Lubricants, Hydrostatic pressure, Approximation, Design, Machinery, Viscosity, Engineers
Proceedings Papers

On the Influence of Piston and Cylinder Density in Tribodynamics of a Radial Piston Digital Fluid Power Displacement Motor

Per Johansen, Daniel B. Roemer, Torben O. Andersen, Henrik C. Pedersen
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A058, October 12–14, 2015
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2015-9608
https://doi.org/10.1115/FPMC2015-9608
View Paper titled, On the Influence of Piston and Cylinder Density in Tribodynamics of a Radial Piston Digital Fluid Power Displacement Motor
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Topics: Cylinders, Density, Displacement, Fluids, Motors, Pistons, Inertia (Mechanics), Simulation, Fluid mechanics, Modeling
Proceedings Papers

Speed-Variable Switched Differential Pump System for Direct Operation of Hydraulic Cylinders

Lasse Schmidt, Daniel B. Roemer, Henrik C. Pedersen, Torben O. Andersen
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A042, October 12–14, 2015
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2015-9575
https://doi.org/10.1115/FPMC2015-9575
View Paper titled, Speed-Variable Switched Differential Pump System for Direct Operation of Hydraulic Cylinders
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Topics: Hydraulic cylinders, Pumps, Cylinders, Pressure, Design, Displacement, Flow (Dynamics), Gear pumps, Cavitation, Compression
Proceedings Papers

Modelling of Moving Coil Actuators in Fast Switching Valves Suitable for Digital Hydraulic Machines

Christian Noergaard, Daniel B. Roemer, Michael M. Bech
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A048, October 12–14, 2015
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2015-9593
https://doi.org/10.1115/FPMC2015-9593
View Paper titled, Modelling of Moving Coil Actuators in Fast Switching Valves Suitable for Digital Hydraulic Machines
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Topics: Actuators, Hydraulic equipment, Modeling, Valves, Simulation, Transients (Dynamics), Design, Eddies (Fluid dynamics), Finite element analysis, Finite element model
Proceedings Papers

Experimental Validation of Mathematical Framework for Fast Switching Valves Used in Digital Hydraulic Machines

Christian Noergaard, Daniel B. Roemer, Michael M. Bech, Torben O. Andersen
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A062, October 12–14, 2015
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2015-9612
https://doi.org/10.1115/FPMC2015-9612
View Paper titled, Experimental Validation of Mathematical Framework for Fast Switching Valves Used in Digital Hydraulic Machines
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Topics: Hydraulic equipment, Valves, Actuators, Optimization, Engineering prototypes, Hydraulic motors, Pressure, Wind turbines
Proceedings Papers

Modeling of Dynamic Fluid Forces in Fast Switching Valves

Daniel B. Roemer, Per Johansen, Henrik C. Pedersen, Torben O. Andersen
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A049, October 12–14, 2015
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2015-9594
https://doi.org/10.1115/FPMC2015-9594
View Paper titled, Modeling of Dynamic Fluid Forces in Fast Switching Valves
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Topics: Fluids, Modeling, Valves, Computational fluid dynamics, Design, Engineering simulation, Optimization, Simulation, Die cutting, Dynamic models
Journal Articles

Fluid Stiction Modeling for Quickly Separating Plates Considering the Liquid Tensile Strength

Daniel B. Roemer, Per Johansen, Henrik C. Pedersen, Torben O. Andersen
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. June 2015, 137(6): 061205.
Paper No: FE-14-1595
https://doi.org/10.1115/1.4029683
Published Online: June 1, 2015
View Article titled, Fluid Stiction Modeling for Quickly Separating Plates Considering the Liquid Tensile Strength
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Topics: Cavitation, Pressure, Stiction, Tensile strength, Tension, Plates (structures)
Proceedings Papers

Analytical Thermal Field Theory Applicable to Oil Hydraulic Fluid Film Lubrication

Per Johansen, Daniel B. Roemer, Henrik C. Pedersen, Torben O. Andersen
Proc. ASME. FPMC2014, ASME/BATH 2014 Symposium on Fluid Power and Motion Control, V001T01A030, September 10–12, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2014-7844
https://doi.org/10.1115/FPMC2014-7844
View Paper titled, Analytical Thermal Field Theory Applicable to Oil Hydraulic Fluid Film Lubrication
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Topics: Field theories (Physics), Fluid film lubrication, Approximation, Cylinders, Dimensional analysis, Energy conservation, Modeling, Numerical analysis, Oils, Petroleum
Proceedings Papers

Oil Stiction in Fast Switching Annular Seat Valves for Digital Displacement Fluid Power Machines

Daniel B. Roemer, Per Johansen, Henrik C. Pedersen, Torben O. Andersen
Proc. ASME. ESDA2014, Volume 2: Dynamics, Vibration and Control; Energy; Fluids Engineering; Micro and Nano Manufacturing, V002T11A021, July 25–27, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ESDA2014-20443
https://doi.org/10.1115/ESDA2014-20443
View Paper titled, Oil Stiction in Fast Switching Annular Seat Valves for Digital Displacement Fluid Power Machines
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Topics: Displacement, Fluids, Machinery, Stiction, Valves, Pressure, Cavitation, High pressure (Physics), Manifolds
Proceedings Papers

Design Method for Fast Switching Seat Valves for Digital Displacement ® Machines

Daniel B. Roemer, Per Johansen, Henrik C. Pedersen, Torben O. Andersen
Proc. ASME. FPNI2014, 8th FPNI Ph.D Symposium on Fluid Power, V001T01A012, June 11–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FPNI2014-7852
https://doi.org/10.1115/FPNI2014-7852
View Paper titled, Design Method for Fast Switching Seat Valves for Digital Displacement ® Machines
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Topics: Design methodology, Displacement, Machinery, Valves, Design, Pressure, Dynamics (Mechanics), Electromagnetic actuators, Energy dissipation, Fluid dynamics
Journal Articles

Asymptotic Approximation of Laminar Lubrication Thermal Field at Low Reduced Peclet and Brinkman Number

Per Johansen, Daniel B. Roemer, Torben O. Andersen, Henrik C. Pedersen
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. October 2014, 136(4): 041706.
Paper No: TRIB-13-1248
https://doi.org/10.1115/1.4027957
Published Online: July 29, 2014
View Article titled, Asymptotic Approximation of Laminar Lubrication Thermal Field at Low Reduced Peclet and Brinkman Number
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Topics: Approximation, Convection, Heat conduction, Lubricants, Lubrication, Temperature, Film thickness, Boundary-value problems
Proceedings Papers

Simulation of Dynamic Behaviour of a Digital Displacement Motor Using Transient 3D Computational Fluid Dynamics Analysis

Daniel B. Roemer, Per Johansen, Henrik C. Pedersen, Torben O. Andersen
Proc. ASME. FPMC2013, ASME/BATH 2013 Symposium on Fluid Power and Motion Control, V001T01A042, October 6–9, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2013-4469
https://doi.org/10.1115/FPMC2013-4469
View Paper titled, Simulation of Dynamic Behaviour of a Digital Displacement Motor Using Transient 3D Computational Fluid Dynamics Analysis
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Topics: Computational fluid dynamics, Displacement, Engines, Motors, Simulation, Transients (Dynamics), Pressure, Valves, Fluids, High pressure (Physics)
Proceedings Papers

Multibody Dynamics of a Fluid Power Radial Piston Motor Including Transient Hydrodynamic Pressure Models in Lubricating Gaps

Per Johansen, Daniel B. Roemer, Torben O. Andersen, Henrik C. Pedersen
Proc. ASME. FPMC2013, ASME/BATH 2013 Symposium on Fluid Power and Motion Control, V001T01A039, October 6–9, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2013-4462
https://doi.org/10.1115/FPMC2013-4462
View Paper titled, Multibody Dynamics of a Fluid Power Radial Piston Motor Including Transient Hydrodynamic Pressure Models in Lubricating Gaps
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Topics: Engines, Fluids, Motors, Multibody dynamics, Pistons, Pressure, Transients (Dynamics), Machinery, Dynamics (Mechanics), Clearances (Engineering)