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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
Published on: November 6, 2015
Bilateral control of master-slave manipulators with constant time delay
A Forouzantabar1, H A Talebi, A K Sedigh
1Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. a.forouzantabar@srbiau.ac.ir
ISA Transactions
|August 25, 2011
Summary
This study introduces a new PID controller for robotic teleoperation, enhancing position tracking and system stability. The controller effectively manages disturbances and contacts, outperforming previous PD controllers.
Area of Science:
- Robotics
- Control Systems
- Mechatronics
Background:
- Teleoperation systems face challenges with communication delays and environmental disturbances.
- Existing controllers, like PD, have limitations in handling complex scenarios.
- Passivity-based control architectures offer a foundation for stable teleoperation.
Purpose of the Study:
- To develop and validate a novel teleoperation controller for nonlinear master-slave robotic systems.
- To improve position tracking and transparency in teleoperation despite constant time delays.
- To enhance robustness against human and environmental disturbances, including contact situations.
Main Methods:
- Extension of a passivity-based control architecture.
- Implementation of a Proportional-Integral-Derivative (PID) controller on both master and slave sides.
- Analysis using Fourier transform and Parseval's identity in the frequency domain to prove system passivity.
- Simulation and semi-experimental validation.
Main Results:
- The proposed PID controller demonstrates superior position tracking compared to PD controllers.
- The controller effectively compensates for disturbances and maintains coordination during free motion and contact.
- Passivity of the teleoperation system is mathematically proven in the frequency domain.
Conclusions:
- The novel PID teleoperation controller significantly improves performance and transparency.
- This approach offers enhanced stability and tracking in challenging robotic teleoperation scenarios.
- The PID controller is a viable advancement over PD controllers for nonlinear master-slave systems with time delays.
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