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R. W. Longman
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Journal Articles

Extracting Physical Parameters of Mechanical Models From Identified State-Space Representations

M. De Angelis, Assistant Professor,, H. Lus¸, Lecturer and Reseach Associate, R. Betti, Associate Professor, R. W. Longman, Mem. ASME, Professor,
Journal: Journal of Applied Mechanics
Publisher: ASME
Article Type: Technical Papers
J. Appl. Mech. September 2002, 69(5): 617–625.
https://doi.org/10.1115/1.1483836
Published Online: August 16, 2002
View Article titled, Extracting Physical Parameters of Mechanical Models From Identified State-Space Representations
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Topics: Actuators, Damping, Degrees of freedom, Eigenvalues, Sensors, Stiffness, Noise (Sound), Trusses (Building)
Journal Articles

Improvement of Observer/Kalman Filter Identification (OKID) by Residual Whitening

M. Phan, L. G. Horta, J.-N. Juang, R. W. Longman
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. April 1995, 117(2): 232–239.
https://doi.org/10.1115/1.2873927
Published Online: April 1, 1995
View Article titled, Improvement of Observer/Kalman Filter Identification (OKID) by Residual Whitening
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Topics: Kalman filters, Filters, Linear systems
Journal Articles

The Design of High-Speed Dwell-Rise-Dwell Cams Using Linear Quadratic Optimal Control Theory

B. C. Fabien, R. W. Longman, F. Freudenstein
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 1994, 116(3): 867–874.
https://doi.org/10.1115/1.2919462
Published Online: September 1, 1994
View Article titled, The Design of High-Speed Dwell-Rise-Dwell Cams Using Linear Quadratic Optimal Control Theory
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Topics: Cams, Design, Optimal control, Trajectories (Physics), Design methodology, Energy dissipation, Engineering design processes, Stress, Vibration
Journal Articles

Kinematic Analysis of Robotic Bevel-Gear Trains

F. Freudenstein, R. W. Longman, C.-K. Chen
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 1984, 106(3): 371–375.
https://doi.org/10.1115/1.3267421
Published Online: September 1, 1984
View Article titled, Kinematic Analysis of Robotic Bevel-Gear Trains
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Topics: Bevel gears, Kinematic analysis, Robotics, Trains, End effectors, Gear trains, Mechanical admittance, Robots
Journal Articles

Application of Optimal Control Theory to the Synthesis of High-Speed Cam-Follower Systems. Part 1: Optimality Criterion

M. Chew, F. Freudenstein, R. W. Longman
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 1983, 105(3): 576–584.
https://doi.org/10.1115/1.3267399
Published Online: September 1, 1983
View Article titled, Application of Optimal Control Theory to the Synthesis of High-Speed Cam-Follower Systems. Part 1: Optimality Criterion
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Topics: Optimal control, Tradeoffs, Dynamic response, Optimization, Design
Journal Articles

Application of Optimal Control Theory to the Synthesis of High-Speed Cam-Follower Systems. Part 2: System Optimization

M. Chew, F. Freudenstein, R. W. Longman
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 1983, 105(3): 585–591.
https://doi.org/10.1115/1.3267400
Published Online: September 1, 1983
View Article titled, Application of Optimal Control Theory to the Synthesis of High-Speed Cam-Follower Systems. Part 2: System Optimization
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Topics: Optimal control, Optimization, Cams, Design, Friction, Pressure, Stress
Journal Articles

Stochastic Artificial Aeration Control for Regional Drainage Basins

N. M. Olgac, R. W. Longman, C. A. Cooper
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. December 1982, 104(4): 337–342.
https://doi.org/10.1115/1.3139719
Published Online: December 1, 1982
View Article titled, Stochastic Artificial Aeration Control for Regional Drainage Basins
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Topics: Drainage, Rivers, Pollution, Feedback, Tree (Data structure), Water pollution
Journal Articles

Optimal Control of a Partially Time Lagged River Aeration System Subject to Random Disturbances

M. K. O¨zgo¨ren, C. A. Cooper, R. W. Longman
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. September 1977, 99(3): 193–200.
https://doi.org/10.1115/1.3427102
Published Online: September 1, 1977
View Article titled, Optimal Control of a Partially Time Lagged River Aeration System Subject to Random Disturbances
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Topics: Optimal control, Rivers, Water pollution, Feedback, Noise (Sound), Pollution
Journal Articles

Optimal Control of a Distributed Parameter, Time-Lagged River Aeration System

M. K. O¨zgo¨ren, R. W. Longman, C. A. Cooper
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research Papers
J. Dyn. Sys., Meas., Control. June 1975, 97(2): 164–171.
https://doi.org/10.1115/1.3426897
Published Online: June 1, 1975
View Article titled, Optimal Control of a Distributed Parameter, Time-Lagged River Aeration System
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Topics: Optimal control, Rivers, Distributed parameter systems, Feedback, Delays, Partial differential equations
Journal Articles

Stability Analysis of Lifting Rigs—Part 2: Sufficient Stability Criteria and Design Guidelines

R. W. Longman, F. Freudenstein
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. May 1975, 97(2): 537–541.
https://doi.org/10.1115/1.3438617
Published Online: May 1, 1975
View Article titled, Stability Analysis of Lifting Rigs—Part 2: Sufficient Stability Criteria and Design Guidelines
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Topics: Design, Stability, Construction equipment, Cranes, Derricks
Journal Articles

Stability Analysis of Lifting Rigs—Part 1: Necessary and Sufficient Conditions

R. W. Longman, F. Freudenstein
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. May 1975, 97(2): 532–536.
https://doi.org/10.1115/1.3438616
Published Online: May 1, 1975
View Article titled, Stability Analysis of Lifting Rigs—Part 1: Necessary and Sufficient Conditions
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Topics: Stability, Manufacturing, Construction equipment, Cranes, Derricks, Stress