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Trajectory optimization of an electro-hydraulic robot

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Abstract

The electro-hydraulic robot has great driving torque and plays an irreplaceable role in manufacturing. In this paper, a trajectory planning method for a 6-DOF electro-hydraulic robot based on time-energy-jerk is proposed and realized. A multi-objective function of the electro-hydraulic robot about working efficiency, impact, stability and energy consumption factors was built, at the same time, the kinematic and dynamic constraint functions were also built. The multi-objective trajectory function of the robot was optimized by using the non-dominated neighborhood immune genetic algorithm, and the optimal position, velocity, acceleration and jerk planning curves of each joint were obtained. In the experiment, the flow output curves of the hydraulic system of joint 6 based on fuzzy-PID control strategy under no-load, 1.5 kg load, 4 kg load were obtained, and show that the velocity and position trajectory of the joint can be well controlled using the presented fuzzy PID control strategy.

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Acknowledgments

This work was supported in part by Sichuan Science and Technology Plan Project under Grant No. 2019JDRC0087.

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Correspondence to Guangzhu Chen.

Additional information

Xueju Peng received his Master of Engineering from Chengdu University of Technology in 2019. His research interests include mechanical-electrical integration, robot control.

Guangzhu Chen is a Professor of the College of Information Science and Technology, Chengdu University of Technology. He received his Ph.D. in Computer Application from Sichuan University. His research interests include robot, mechatronics, artificial intelligence, and machine vision.

Yingjie Tang received his Master of Engineering from Chengdu University of Technology in 2020. His research interests include robot vision control and deep learning.

Changwei Miao received his Master of Engineering from Chengdu University of Technology in 2020. His research interests include mechatronics and robot trajectory planning.

Yang Li is currently a graduate student in the College of Nuclear Technology and Automation Engineering, Chengdu University of Technology. His research interests include mobile robot navigation and machine vision.

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Peng, X., Chen, G., Tang, Y. et al. Trajectory optimization of an electro-hydraulic robot. J Mech Sci Technol 34, 4281–4294 (2020). https://doi.org/10.1007/s12206-020-0919-4

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  • DOI: https://doi.org/10.1007/s12206-020-0919-4

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