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Nariman Sepehri
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Journal Articles

The Cavitation Issue in Asymmetrical Axial-Piston Pumps

Gustavo Koury Costa, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. May 2022, 144(5): 054501.
Paper No: DS-21-1150
https://doi.org/10.1115/1.4053295
Published Online: February 1, 2022
View Article titled, The Cavitation Issue in Asymmetrical Axial-Piston Pumps
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Journal Articles

Optimization-Driven Controller Design for a High-Performance Electro-Hydrostatic Asymmetric Actuator Operating in All Quadrants

Khurram Butt, Gustavo Koury Costa, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Technical Briefs
J. Dyn. Sys., Meas., Control. September 2021, 143(9): 094503.
Paper No: DS-20-1081
https://doi.org/10.1115/1.4050722
Published Online: May 13, 2021
View Article titled, Optimization-Driven Controller Design for a High-Performance Electro-Hydrostatic Asymmetric Actuator Operating in All Quadrants
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Topics: Actuators, Control equipment, Design, Optimization, Stress, Position control
Journal Articles

A Practical Approach for Designing Fault-Tolerant Position Controllers in Hydraulic Actuators: Methodology and Experimental Validation

Ali Maddahi, Nariman Sepehri, Witold Kinsner
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. August 2020, 142(8): 081001.
Paper No: DS-19-1209
https://doi.org/10.1115/1.4046336
Published Online: March 18, 2020
View Article titled, A Practical Approach for Designing Fault-Tolerant Position Controllers in Hydraulic Actuators: Methodology and Experimental Validation
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Topics: Control equipment, Design, Errors, Leakage, Actuators, Wavelets
Proceedings Papers

Measuring the Losses of Hydrostatic Pumps and Motors: A Critical Review of ISO4409:2007

Peter Achten, Robin Mommers, Takao Nishiumi, Hubertus Murrenhoff, Nariman Sepehri, Kim Stelson, Jan-Ove Palmberg, Katharina Schmitz
Proc. ASME. FPMC2019, ASME/BATH 2019 Symposium on Fluid Power and Motion Control, V001T01A007, October 7–9, 2019
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2019-1615
https://doi.org/10.1115/FPMC2019-1615
View Paper titled, Measuring the Losses of Hydrostatic Pumps and Motors: A Critical Review of ISO4409:2007
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Topics: Hydrostatics, Motors, Pumps, Displacement, Bulk modulus, Energy conversion, Engineering standards, Flow (Dynamics), Hydraulic pumps, Preferences
Journal Articles

A Nonlinear Integral Sliding Surface to Improve the Transient Response of a Force-Controlled Pneumatic Actuator With Long Transmission Lines

Khurram Butt, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. December 2019, 141(12): 121012.
Paper No: DS-18-1564
https://doi.org/10.1115/1.4044720
Published Online: September 27, 2019
View Article titled, A Nonlinear Integral Sliding Surface to Improve the Transient Response of a Force-Controlled Pneumatic Actuator With Long Transmission Lines
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Topics: Control equipment, Delays, Errors, Force control, Pneumatic actuators, Trajectories (Physics), Transients (Dynamics), Transmission lines, Uncertainty, Design
Journal Articles

Controller Design and Stability Analysis of Output Pressure Regulation in Electrohydrostatic Actuators

Masoumeh Esfandiari, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. April 2019, 141(4): 041008.
Paper No: DS-17-1476
https://doi.org/10.1115/1.4042028
Published Online: December 19, 2018
View Article titled, Controller Design and Stability Analysis of Output Pressure Regulation in Electrohydrostatic Actuators
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Topics: Actuators, Control equipment, Design, Frequency response, Pressure, Stability, Quantum field theory, Uncertainty, Closed loop systems, Friction
Journal Articles

A Lyapunov Stable Controller for Bilateral Haptic Teleoperation of Single-Rod Hydraulic Actuators Subjected to Base Disturbance

Vikram Banthia, Ali Maddahi, Kourosh Zareinia, Subramaniam Balakrishnan, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. March 2019, 141(3): 031013.
Paper No: DS-18-1140
https://doi.org/10.1115/1.4041851
Published Online: November 22, 2018
View Article titled, A Lyapunov Stable Controller for Bilateral Haptic Teleoperation of Single-Rod Hydraulic Actuators Subjected to Base Disturbance
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Topics: Actuators, Control equipment, Haptics, Manipulators, Stability, Simulation
Journal Articles

Four-Quadrant Analysis and System Design for Single-Rod Hydrostatic Actuators

Gustavo Koury Costa, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. February 2019, 141(2): 021011.
Paper No: DS-18-1087
https://doi.org/10.1115/1.4041382
Published Online: October 16, 2018
View Article titled, Four-Quadrant Analysis and System Design for Single-Rod Hydrostatic Actuators
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Topics: Circuits, Cylinders, Flow (Dynamics), Stress, Valves, Actuators, Pressure, Pumps
Proceedings Papers

Stability Study of a Pump-Controlled Circuit for Single Rod Cylinders via the Concept of Lyapunov Exponents

Yuming Sun, Ahmed Imam, Christine Wu, Nariman Sepehri
Proc. ASME. FPMC2017, ASME/BATH 2017 Symposium on Fluid Power and Motion Control, V001T01A058, October 16–19, 2017
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2017-4314
https://doi.org/10.1115/FPMC2017-4314
View Paper titled, Stability Study of a Pump-Controlled Circuit for Single Rod Cylinders via the Concept of Lyapunov Exponents
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Topics: Circuits, Cylinders, Pumps, Stability, Actuators, Control equipment, Cracking (Materials), Design, Dynamics (Mechanics), Eigenvalues
Journal Articles

The Effects of Aging and Dual Tasking on Human Gait Complexity During Treadmill Walking: A Comparative Study Using Quantized Dynamical Entropy and Sample Entropy

Samira Ahmadi, Christine Wu, Nariman Sepehri, Anuprita Kantikar, Mayur Nankar, Tony Szturm
Journal: Journal of Biomechanical Engineering
Publisher: ASME
Article Type: Research-Article
J Biomech Eng. January 2018, 140(1): 011006.
Paper No: BIO-16-1514
https://doi.org/10.1115/1.4037945
Published Online: October 31, 2017
View Article titled, The Effects of Aging and Dual Tasking on Human Gait Complexity During Treadmill Walking: A Comparative Study Using Quantized Dynamical Entropy and Sample Entropy
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Topics: Entropy, Signals, Time series
Journal Articles

A Lyapunov Stable Controller for Bilateral Haptic Teleoperation of Single-Rod Hydraulic Actuators

Vikram Banthia, Kourosh Zareinia, Subramaniam Balakrishnan, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. November 2017, 139(11): 111001.
Paper No: DS-16-1438
https://doi.org/10.1115/1.4036535
Published Online: June 28, 2017
View Article titled, A Lyapunov Stable Controller for Bilateral Haptic Teleoperation of Single-Rod Hydraulic Actuators
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Topics: Actuators, Control equipment, Haptics, Simulation, Stability, Stiffness, Manipulators, Hydraulic actuators, Feedback
Journal Articles

Fault-Tolerant Actuating Pressure Controller Design for an Electrohydrostatic Actuator Experiencing a Leaky Piston Seal

Guangan Ren, Jinchun Song, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. June 2017, 139(6): 061004.
Paper No: DS-16-1237
https://doi.org/10.1115/1.4035348
Published Online: March 22, 2017
View Article titled, Fault-Tolerant Actuating Pressure Controller Design for an Electrohydrostatic Actuator Experiencing a Leaky Piston Seal
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Topics: Actuators, Control equipment, Design, Leakage, Transfer functions, Pistons, Stress, Quantum field theory, Pressure, Pressure controllers
Proceedings Papers

Towards Oscillation Reduction in Forestry Cranes

Szabolcs Fodor, Carlos Vázquez, Leonid Freidovich, Nariman Sepehri
Proc. ASME. FPMC2016, BATH/ASME 2016 Symposium on Fluid Power and Motion Control, V001T01A049, September 7–9, 2016
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2016-1792
https://doi.org/10.1115/FPMC2016-1792
View Paper titled, Towards Oscillation Reduction in Forestry Cranes
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Topics: Cranes, Oscillations, Actuators, Signals, Damage, Pressure measurement, Torque, Wear
Proceedings Papers

Design and Stability Analysis of a QFT Pressure Controller of a Hydraulic Actuator Using Takagi-Sugeno Fuzzy Model

Masoumeh Esfandiari, Nariman Sepehri
Proc. ASME. FPMC2015, ASME/BATH 2015 Symposium on Fluid Power and Motion Control, V001T01A068, October 12–14, 2015
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2015-9636
https://doi.org/10.1115/FPMC2015-9636
View Paper titled, Design and Stability Analysis of a QFT Pressure Controller of a Hydraulic Actuator Using Takagi-Sugeno Fuzzy Model
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Topics: Actuators, Design, Pressure controllers, Quantum field theory, Stability, Control equipment, Closed loop systems, Uncertainty, Engineering design processes, Feedback
Journal Articles

A Hybrid Haptic Sensation for Teleoperation of Hydraulic Manipulators

Kourosh Zareinia, Nariman Sepehri
Journal: Journal of Dynamic Systems, Measurement, and Control
Publisher: ASME
Article Type: Research-Article
J. Dyn. Sys., Meas., Control. September 2015, 137(9): 091001.
Paper No: DS-14-1310
https://doi.org/10.1115/1.4030337
Published Online: September 1, 2015
View Article titled, A Hybrid Haptic Sensation for Teleoperation of Hydraulic Manipulators
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Topics: Actuators, Haptics, Manipulators, Stability, Stiffness, Control equipment, Pressure
Proceedings Papers

Hydraulic Actuator Internal Leakage Detection Using Cross-Correlation Time Series Analysis

Morgan May, Nariman Sepehri, Witold Kinsner
Proc. ASME. FPMC2014, ASME/BATH 2014 Symposium on Fluid Power and Motion Control, V001T01A003, September 10–12, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2014-7804
https://doi.org/10.1115/FPMC2014-7804
View Paper titled, Hydraulic Actuator Internal Leakage Detection Using Cross-Correlation Time Series Analysis
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Topics: Actuators, Leakage, Time series, Pistons, Flow (Dynamics), Cylinders, Fluids, Circuits, Errors, Pressure
Proceedings Papers

Comparison Between an Intelligent Controller and a Sliding Mode Controller to Positioning Pneumatic Actuators

Naghmeh Garmsiri, Nariman Sepehri
Proc. ASME. FPMC2014, ASME/BATH 2014 Symposium on Fluid Power and Motion Control, V001T01A004, September 10–12, 2014
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2014-7805
https://doi.org/10.1115/FPMC2014-7805
View Paper titled, Comparison Between an Intelligent Controller and a Sliding Mode Controller to Positioning Pneumatic Actuators
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Topics: Control equipment, Intelligent control systems, Pneumatic actuators, Sliding mode control, Stress, Brain, Flexible structures, Friction, Robustness, Stiction
Proceedings Papers

Stability Analysis of QFT Controllers Designed for Hydraulic Actuators Using Takagi-Sugeno Fuzzy Modeling Approach

Masoumeh Esfandiari, Nariman Sepehri
Proc. ASME. FPMC2013, ASME/BATH 2013 Symposium on Fluid Power and Motion Control, V001T01A031, October 6–9, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2013-4451
https://doi.org/10.1115/FPMC2013-4451
View Paper titled, Stability Analysis of QFT Controllers Designed for Hydraulic Actuators Using Takagi-Sugeno Fuzzy Modeling Approach
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Topics: Control equipment, Hydraulic actuators, Modeling, Quantum field theory, Stability, Takagi–Sugeno fuzzy models, Closed loop systems, Feedback, Fuzzy logic, Theorems (Mathematics)
Proceedings Papers

Wireless Control of a Teleoperated Hydraulic Manipulator With Application Towards Live-Line Maintenance

Yaser Maddahi, Nariman Sepehri, Stephen Liao, Wai-keung Fung, Ekram Hossain
Proc. ASME. FPMC2013, ASME/BATH 2013 Symposium on Fluid Power and Motion Control, V001T01A033, October 6–9, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2013-4454
https://doi.org/10.1115/FPMC2013-4454
View Paper titled, Wireless Control of a Teleoperated Hydraulic Manipulator With Application Towards Live-Line Maintenance
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Topics: Maintenance, Manipulators, End effectors, Errors, Haptics
Proceedings Papers

Position Tracking of a Pneumatic Actuator Using Backstepping-Sliding Mode Control With Adaptive Friction Observer

Ramhuzaini Abd. Rahman, Nariman Sepehri
Proc. ASME. FPMC2013, ASME/BATH 2013 Symposium on Fluid Power and Motion Control, V001T01A028, October 6–9, 2013
Publisher: American Society of Mechanical Engineers
Paper No: FPMC2013-4447
https://doi.org/10.1115/FPMC2013-4447
View Paper titled, Position Tracking of a Pneumatic Actuator Using Backstepping-Sliding Mode Control With Adaptive Friction Observer
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Topics: Friction, Pneumatic actuators, Sliding mode control, Control equipment, Errors, Pneumatic cylinders, Servomechanisms, Stability, Steady state, Tracking control