Robust Passivity-Based Voltage Control of Robot Manipulators

Chenarani, H.; Fateh, M.M.

doi:10.22061/jecei.2020.6041.275

Document Type : Original Research Paper

Authors

Faculty of Electrical, Shahrood University of Technology, Shahrood, Iran

https://doi.org/10.22061/jecei.2020.6041.275

Abstract

Background and Objectives: This paper presents a robust passivity-based voltage controller (PBVC) for robot manipulators with n degree of freedom in the presence of model uncertainties and external disturbance.
Methods: The controller design procedure is divided into two steps. First, a model-based controller is designed based on the PBC scheme. An output feedback law is suggested to ensure the asymptotic stability of the closed-loop error dynamics. Second, a regressor-free adaptation law is obtained to estimate the variations of the model uncertainties and external disturbance. The proposed control law is provided in two different orders.
Results: The suggested controller inherits both advantages of the passivitybased control (PBC) scheme and voltage control strategy (VCS). Since the proposed control approach only uses the electrical model of the actuators, the obtained control law is simple and also has an independent-joint structure. Moreover, the proposed PBVC overcomes the drawbacks of torque control strategy such as the complexity of manipulator dynamics, practical problems and ignoring the role of actuators. Moreover, computer simulations are carried out for both tracking and regulation purposes. In addition, the proposed controller is compared with a passivity-based torque controller where the simulation results show the appropriate efficiency of the proposed approach.
Conclusion: The robust PBVC is proposed for EDRM in presence of external disturbance. To the best of our knowledge, it is the first time that a regressorfree adaptation law is obtained to approximate the lumped uncertainties according to the passivity-based VCS. Moreover, the electrical model of the actuators is utilized in a decentralized form to control each joint separately.

Keywords

20.1001.1.23223952.2019.7.2.2.6

Main Subjects

Open Access

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Journal of Electrical and Computer Engineering Innovations (JECEI)

Robust Passivity-Based Voltage Control of Robot Manipulators

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Volume 7, Issue 2
July 2019
Pages 145-154

Robust Passivity-Based Voltage Control of Robot Manipulators

References

References

Send comment about this article

Volume 7, Issue 2July 2019Pages 145-154

Volume 7, Issue 2
July 2019
Pages 145-154