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Journal Articles

Sub-Second Prediction of the Heatmap of Powder-Beds in Additive Manufacturing Using Deep Encoder–Decoder Convolutional Neural Networks

Ardalan R. Sofi, Bahram Ravani
Journal: Journal of Computing and Information Science in Engineering
Publisher: ASME
Article Type: Research Papers
J. Comput. Inf. Sci. Eng. April 2023, 23(2): 021008.
Paper No: JCISE-22-1035
https://doi.org/10.1115/1.4054559
Published Online: June 7, 2022
View Article titled, Sub-Second Prediction of the Heatmap of Powder-Beds in Additive Manufacturing Using Deep Encoder–Decoder Convolutional Neural Networks
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Topics: Artificial neural networks, Lasers, Physics, Simulation, Additive manufacturing, Temperature, Manufacturing, Trajectories (Physics)
Proceedings Papers

On First-Order Decoupling of Equations of Motion for Constrained Dynamical Systems

Timothy A. Loduha, Bahram Ravani
Proc. ASME. DETC93, 19th Design Automation Conference: Volume 1 — Mechanical System Dynamics; Concurrent and Robust Design; Design for Assembly and Manufacture; Genetic Algorithms in Design and Structural Optimization, 17-23, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0288
https://doi.org/10.1115/DETC1993-0288
View Paper titled, On First-Order Decoupling of Equations of Motion for Constrained Dynamical Systems
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Topics: Dynamic systems, Equations of motion, Relaxation (Physics), Simulation
Proceedings Papers

Bézier Curves on Riemannian Manifolds and Lie Groups With Kinematics Applications

Frank C. Park, Bahram Ravani
Proc. ASME. DETC94, 23rd Biennial Mechanisms Conference: Mechanism Synthesis and Analysis, 15-21, September 11–14, 1994
Publisher: American Society of Mechanical Engineers
Paper No: DETC1994-0173
https://doi.org/10.1115/DETC1994-0173
View Paper titled, Bézier Curves on Riemannian Manifolds and Lie Groups With Kinematics Applications
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Topics: Kinematics, Manifolds, Algorithms, Algebra, Interpolation, Space, Trajectories (Physics)
Proceedings Papers

Contact Stress Analysis in Ball Screw Mechanism Using the Tubular Medial Axis Representation of Contacting Surfaces

Huai-Te T. Huang, Bahram Ravani
Proc. ASME. DETC95, Volume 1: 21st Design Automation Conference, 749-756, September 17–20, 1995
Publisher: American Society of Mechanical Engineers
Paper No: DETC1995-0098
https://doi.org/10.1115/DETC1995-0098
View Paper titled, Contact Stress Analysis in Ball Screw Mechanism Using the Tubular Medial Axis Representation of Contacting Surfaces
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Topics: Screws, Stress analysis (Engineering), Bearings, Deformation, Design engineering, Geometry, Stress, Thread
Proceedings Papers

Design of Tactile Fixtures for Robotics and Manufacturing

Walter W. Nederbragt, Bahram Ravani
Proc. ASME. DETC-CIE96, Volume 2A: 24th Biennial Mechanisms Conference, V02AT02A001, August 18–22, 1996
Publisher: American Society of Mechanical Engineers
Paper No: 96-DETC/MECH-1155
https://doi.org/10.1115/96-DETC/MECH-1155
View Paper titled, Design of Tactile Fixtures for Robotics and Manufacturing
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Topics: Design, Manufacturing, Robotics, Calibration, Sensors
Proceedings Papers

Ruled Surfaces, Lie Groups, and Mesh Generation

Kenneth Sprott, Bahram Ravani
Proc. ASME. DETC97, Volume 2: 23rd Design Automation Conference, V002T29A070, September 14–17, 1997
Publisher: American Society of Mechanical Engineers
Paper No: DETC97/DAC-3996
https://doi.org/10.1115/DETC97/DAC-3996
View Paper titled, Ruled Surfaces, Lie Groups, and Mesh Generation
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Topics: Mesh generation, B-splines, Computational methods, Design, Displacement, Finite element analysis
Proceedings Papers

Differential Geometric Analysis of Singularities of Point Trajectories of Serial and Parallel Manipulators

Ashitava Ghosal, Bahram Ravani
Proc. ASME. DETC98, Volume 1A: 25th Biennial Mechanisms Conference, V01AT01A025, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/MECH-5967
https://doi.org/10.1115/DETC98/MECH-5967
View Paper titled, Differential Geometric Analysis of Singularities of Point Trajectories of Serial and Parallel Manipulators
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Topics: Manipulators, Degrees of freedom, Geometry, Shapes, Trajectories (Physics)
Proceedings Papers

A Dual Ellipse Is a Cylindroid

Ashitava Ghosal, Bahram Ravani
Proc. ASME. DETC98, Volume 1B: 25th Biennial Mechanisms Conference, V01BT01A032, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/MECH-5884
https://doi.org/10.1115/DETC98/MECH-5884
View Paper titled, A Dual Ellipse Is a Cylindroid
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Topics: Eigenvalues, Kinematics
Proceedings Papers

Kinematic Fixturing With Respect to a Plane Using Contact Sensing

Walter W. Nederbragt, Bahram Ravani
Proc. ASME. DETC98, Volume 1B: 25th Biennial Mechanisms Conference, V01BT01A064, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/MECH-5907
https://doi.org/10.1115/DETC98/MECH-5907
View Paper titled, Kinematic Fixturing With Respect to a Plane Using Contact Sensing
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Topics: Algorithms, Cylinders, Fixturing, Kinematics, Robotics
Proceedings Papers

Design of a Novel Fixture for Part Referencing

Walter W. Nederbragt, Bahram Ravani
Proc. ASME. DETC98, Volume 1B: 25th Biennial Mechanisms Conference, V01BT01A065, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/MECH-5986
https://doi.org/10.1115/DETC98/MECH-5986
View Paper titled, Design of a Novel Fixture for Part Referencing
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Topics: Design, Geometry
Proceedings Papers

Geometric Criteria for Gouge-Free Three-Axis Milling of Sculptured Surfaces

Helmut Pottmann, Johannes Wallner, Georg Glaeser, Bahram Ravani
Proc. ASME. DETC98, Volume 1A: 25th Biennial Mechanisms Conference, V01AT01A084, September 13–16, 1998
Publisher: American Society of Mechanical Engineers
Paper No: DETC98/MECH-5874
https://doi.org/10.1115/DETC98/MECH-5874
View Paper titled, Geometric Criteria for Gouge-Free Three-Axis Milling of Sculptured Surfaces
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Topics: Chisels, Milling, Shapes, Collisions (Physics), Computation
Proceedings Papers

A Non-Iterative Carrier Phase Differential GNSS Kinematic Localization Method

Mohammad Hadi Tabatabaee, Bahram Ravani
Proc. ASME. IDETC-CIE2017, Volume 3: 19th International Conference on Advanced Vehicle Technologies; 14th International Conference on Design Education; 10th Frontiers in Biomedical Devices, V003T01A007, August 6–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: DETC2017-68209
https://doi.org/10.1115/DETC2017-68209
View Paper titled, A Non-Iterative Carrier Phase Differential GNSS Kinematic Localization Method
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Topics: Kinematics, Vehicles, Errors, Iterative methods, Roads, Surface roughness
Proceedings Papers

A Computational Method for Formulation and Solution of Dynamical Equations for Complex Mechanisms and Multibody Systems

Kristopher Wehage, Bahram Ravani
Proc. ASME. IDETC-CIE2017, Volume 5A: 41st Mechanisms and Robotics Conference, V05AT08A031, August 6–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: DETC2017-67766
https://doi.org/10.1115/DETC2017-67766
View Paper titled, A Computational Method for Formulation and Solution of Dynamical Equations for Complex Mechanisms and Multibody Systems
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Topics: Computational methods, Multibody systems, Equations of motion, Kinematics, Bifurcation, Linkages, Simulation
Journal Articles

A Control-Theoretic Model for Human Time-Motion Evaluation in Pick-and-Place Operations

Chao Wang, Bahram Ravani, Ronald A. Hess
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. April 2017, 139(4): 041009.
Paper No: DS-16-1111
https://doi.org/10.1115/1.4035095
Published Online: February 9, 2017
View Article titled, A Control-Theoretic Model for Human Time-Motion Evaluation in Pick-and-Place Operations
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Topics: Bushings, Design, Errors, Feedback, Manufacturing, Modeling, Quantum field theory, Trajectories (Physics), Transfer functions, Dynamics (Mechanics)
Journal Articles

Physical Modeling for Selective Laser Sintering Process

Arash Gobal, Bahram Ravani
Journal: Journal of Computing and Information Science in Engineering
Publisher: ASME
Article Type: Research-Article
J. Comput. Inf. Sci. Eng. June 2017, 17(2): 021002.
Paper No: JCISE-16-1058
https://doi.org/10.1115/1.4034473
Published Online: January 30, 2017
View Article titled, Physical Modeling for Selective Laser Sintering Process
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Topics: Lasers, Modeling, Particulate matter, Simulation, Sintering, Finite element analysis, Temperature, Heat, Heat transfer, Laser beams
Proceedings Papers

A Comparative Experimental Evaluation of IMU Designs

Bahram Ravani, Jason L. Sherrett, Ty A. Lasky
Proc. ASME. IDETC-CIE2015, Volume 9: 2015 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications, V009T07A055, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-46358
https://doi.org/10.1115/DETC2015-46358
View Paper titled, A Comparative Experimental Evaluation of IMU Designs
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Topics: Accelerometers, Design, Filtration, Magnetic fields, Magnetometers, Measurement units and standards, Navigation, Rapid prototyping, Sensors, Testing
Proceedings Papers

Development of a Control Theoretic Alternative to Fitts’ Law With Application to In-Vehicle Touchscreen Interface

Chao Wang, Bahram Ravani
Proc. ASME. IDETC-CIE2015, Volume 9: 2015 ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications, V009T07A004, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-46341
https://doi.org/10.1115/DETC2015-46341
View Paper titled, Development of a Control Theoretic Alternative to Fitts’ Law With Application to In-Vehicle Touchscreen Interface
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Topics: Vehicles, Noise (Sound)
Proceedings Papers

Development of a Toolkit for the Analysis and Design of Composite Pressure Vessels

Elias Ledesma, Salvador M. Aceves, Francisco Espinoza-Loza, Bahram Ravani
Proc. ASME. IMECE2012, Volume 3: Design, Materials and Manufacturing, Parts A, B, and C, 187-198, November 9–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2012-88505
https://doi.org/10.1115/IMECE2012-88505
View Paper titled, Development of a Toolkit for the Analysis and Design of Composite Pressure Vessels
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Topics: Composite materials, Design, Pressure vessels, Fibers, Algorithms, Failure, Graphical user interfaces, Honeycomb structures, Metals, Parametric design
Journal Articles

On the Regulus Associated With the General Displacement of a Line and Its Application in Determining Displacement Screws

Chintien Huang, Wuchang Kuo, Bahram Ravani
Journal: Journal of Mechanisms and Robotics
Publisher: ASME
Article Type: Research Papers
J. Mechanisms Robotics. November 2010, 2(4): 041013.
https://doi.org/10.1115/1.4001729
Published Online: October 14, 2010
View Article titled, On the Regulus Associated With the General Displacement of a Line and Its Application in Determining Displacement Screws
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Topics: Displacement, Screws
Journal Articles

Three-Dimensional Generalizations of Reuleaux’s and Instant Center Methods Based on Line Geometry

Jasem Baroon, Bahram Ravani
Journal: Journal of Mechanisms and Robotics
Publisher: ASME
Article Type: Research Papers
J. Mechanisms Robotics. November 2010, 2(4): 041011.
https://doi.org/10.1115/1.4001727
Published Online: October 7, 2010
View Article titled, Three-Dimensional Generalizations of Reuleaux’s and Instant Center Methods Based on Line Geometry
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Topics: Screws, Geometry, Construction