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Karin Nachbagauer
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Journal Articles

The Use of Slack Variables in the Adjoint Method Handling Inequality Constraints in Optimal Control and the Application to Tumor Drug Dosage

Open Access
Philipp Eichmeir, Karin Nachbagauer, Wolfgang Steiner
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. February 2025, 20(2): 021004.
Paper No: CND-24-1119
https://doi.org/10.1115/1.4067128
Published Online: December 16, 2024
View Articletitled, The Use of Slack Variables in the Adjoint Method Handling Inequality Constraints in Optimal Control and the Application to Tumor Drug Dosage
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Topics: Optimal control, Optimization, Tumors, Drugs
Journal Articles

Time-Optimal Control of Dynamic Systems Regarding Final Constraints

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Philipp Eichmeir, Karin Nachbagauer, Thomas Lauß, Karim Sherif, Wolfgang Steiner
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. March 2021, 16(3): 031003.
Paper No: CND-20-1290
https://doi.org/10.1115/1.4049334
Published Online: January 22, 2021
View Articletitled, Time-Optimal Control of Dynamic Systems Regarding Final Constraints
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Topics: Algorithms, Boundary-value problems, Differential equations, Dynamic systems, Errors, Optimal control, Optimization, Robots, Time optimal control, Pendulums
Journal Articles

The Adjoint Method for Time-Optimal Control Problems

Open Access
Philipp Eichmeir, Thomas Lauß, Stefan Oberpeilsteiner, Karin Nachbagauer, Wolfgang Steiner
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. February 2021, 16(2): 021003.
Paper No: CND-20-1345
https://doi.org/10.1115/1.4048808
Published Online: November 18, 2020
View Articletitled, The Adjoint Method for Time-Optimal Control Problems
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Topics: Time optimal control, Vehicles, Optimal control, Equations of motion, Boundary-value problems, Dynamic systems, Roads
Proceedings Papers

The Adjoint Gradient Method for Time-Optimal Control of a Moon Landing: Ascent, Descent, and Abort

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Philipp Eichmeir, Karin Nachbagauer, Wolfgang Steiner
Proc. ASME. IDETC-CIE2020, Volume 2: 16th International Conference on Multibody Systems, Nonlinear Dynamics, and Control (MSNDC), V002T02A001, August 17–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: DETC2020-22034
https://doi.org/10.1115/DETC2020-22034
View Paper titled, The Adjoint Gradient Method for Time-Optimal Control of a Moon Landing: Ascent, Descent, and Abort
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Topics: Boundary-value problems, Dynamic systems, Gradient methods, Nozzles, Robotics, Robots, Thrust, Time optimal control
Journal Articles

The Discrete Adjoint Gradient Computation for Optimization Problems in Multibody Dynamics

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Thomas Lauß, Stefan Oberpeilsteiner, Wolfgang Steiner, Karin Nachbagauer
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. May 2017, 12(3): 031016.
Paper No: CND-16-1336
https://doi.org/10.1115/1.4035197
Published Online: December 5, 2016
View Articletitled, The Discrete Adjoint Gradient Computation for Optimization Problems in Multibody Dynamics
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Topics: Computation, Equations of motion, Interpolation, Multibody dynamics, Multibody systems, Optimization, Trajectories (Physics), Robots, Algorithms, Signals
Journal Articles

The Use of the Adjoint Method for Solving Typical Optimization Problems in Multibody Dynamics

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Karin Nachbagauer, Stefan Oberpeilsteiner, Karim Sherif, Wolfgang Steiner
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. November 2015, 10(6): 061011.
Paper No: CND-14-1135
https://doi.org/10.1115/1.4028417
Published Online: November 1, 2015
View Articletitled, The Use of the Adjoint Method for Solving Typical Optimization Problems in Multibody Dynamics
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Topics: Computation, Multibody dynamics, Optimization, Optimal control, Multibody systems, Algorithms, Boundary-value problems, Equations of motion
Journal Articles

A Detailed Derivation of the Velocity-Dependent Inertia Forces in the Floating Frame of Reference Formulation

Available to Purchase
Karim Sherif, Karin Nachbagauer
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Technical Briefs
J. Comput. Nonlinear Dynam. October 2014, 9(4): 044501.
Paper No: CND-13-1155
https://doi.org/10.1115/1.4026083
Published Online: July 11, 2014
View Articletitled, A Detailed Derivation of the Velocity-Dependent Inertia Forces in the Floating Frame of Reference Formulation
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Topics: Equations of motion, Inertia (Mechanics)
Proceedings Papers

HOTINT: A Script Language Based Framework for the Simulation of Multibody Dynamics Systems

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Johannes Gerstmayr, Alexander Dorninger, Rafael Eder, Peter Gruber, Daniel Reischl, Martin Saxinger, Markus Schörgenhumer, Alexander Humer, Karin Nachbagauer, Astrid Pechstein, Yury Vetyukov
Proc. ASME. IDETC-CIE2013, Volume 7B: 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, V07BT10A047, August 4–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: DETC2013-12299
https://doi.org/10.1115/DETC2013-12299
View Paper titled, HOTINT: A Script Language Based Framework for the Simulation of Multibody Dynamics Systems
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Topics: Multibody dynamics, Simulation, Finite element analysis, Education, Errors, Graphical user interfaces, Mechatronics, Modeling, Sensors, Stress
Journal Articles

Structural and Continuum Mechanics Approaches for a 3D Shear Deformable ANCF Beam Finite Element: Application to Buckling and Nonlinear Dynamic Examples

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Karin Nachbagauer, Johannes Gerstmayr
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. January 2014, 9(1): 011013.
Paper No: CND-12-1226
https://doi.org/10.1115/1.4025282
Published Online: October 15, 2013
View Articletitled, Structural and Continuum Mechanics Approaches for a 3D Shear Deformable ANCF Beam Finite Element: Application to Buckling and Nonlinear Dynamic Examples
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Topics: Buckling, Finite element analysis, Shear (Mechanics), Stress, Pendulums, Continuum mechanics, Deformation, Rotation
Journal Articles

Structural and Continuum Mechanics Approaches for a 3D Shear Deformable ANCF Beam Finite Element: Application to Static and Linearized Dynamic Examples

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Karin Nachbagauer, Peter Gruber, Johannes Gerstmayr
Journal: Journal of Computational and Nonlinear Dynamics
Publisher: ASME
Article Type: Research-Article
J. Comput. Nonlinear Dynam. April 2013, 8(2): 021004.
Paper No: CND-11-1141
https://doi.org/10.1115/1.4006787
Published Online: July 23, 2012
View Articletitled, Structural and Continuum Mechanics Approaches for a 3D Shear Deformable ANCF Beam Finite Element: Application to Static and Linearized Dynamic Examples
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Topics: Cantilever beams, Continuum mechanics, Deformation, Finite element analysis, Shear (Mechanics), Structural analysis, Structural mechanics
Proceedings Papers

A Spatial Thin Beam Finite Element Based on the Absolute Nodal Coordinate Formulation Without Singularities

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Karin Nachbagauer, Peter G. Gruber, Yury Vetyukov, Johannes Gerstmayr
Proc. ASME. IDETC-CIE2011, Volume 4: 8th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A and B, 909-917, August 28–31, 2011
Publisher: American Society of Mechanical Engineers
Paper No: DETC2011-47732
https://doi.org/10.1115/DETC2011-47732
View Paper titled, A Spatial Thin Beam Finite Element Based on the Absolute Nodal Coordinate Formulation Without Singularities
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Topics: Finite element analysis, Deformation, Computation, Displacement, Rotation, Torsion