Hostname: page-component-5d84bcc8dc-6zg7d Total loading time: 0 Render date: 2026-08-21T20:11:43.890Z Has data issue: false hasContentIssue false

Dynamic feedforward control of spatial cable-driven hyper-redundant manipulators for on-orbit servicing

Published online by Cambridge University Press:  29 August 2018

Zonggao Mu
Affiliation:
The School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Tianliang Liu
Affiliation:
The School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Wenfu Xu*
Affiliation:
The School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Yunjiang Lou
Affiliation:
The School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China
Bin Liang
Affiliation:
Department of Automation, School of Information Science and Technology, Tsinghua University, Beijing 100084, China
*
*Corresponding author. E-mail: wfxu@hit.edu.cn

Summary

The hyper-redundant manipulators are suitable for working in the constrained on-orbit servicing environment due to the extreme flexibility. However, its modelling and control are very challenging due to the characteristics of non-linearity and strong coupling. In this paper, considering the multi-level mapping among the motors, cables, joints, and end-effector, a proportional derivative (PD) with dynamic feedforward compensation control system is designed. The corresponding control system is divided into five parts: controller, planner, actuator, manipulator, and sensor. The actual control torque consisting of the desired feedforward torque and the feedback torque is generated by the controller. In order to improve the tracking accuracy and maintain rapid response, the torque, which is calculated by the dynamics model of the traditional joint-driven manipulator, is regarded as the desired feedforward torque. The parameters of interest are the angle and velocity of the universal joint and motors. The planner plans and converts the desired parameters of the universal joint to corresponding motors. Combining with the feedback angles and velocities signals of the corresponding motors, the feedback torque can be calculated by the PD control module. Finally, typical cases of six universal joints (12DOFs) manipulators are simulated and experimented. The results demonstrate that the method is very efficient for controlling spatial cable-driven hyper-redundant manipulators.

Information

Type
Articles
Copyright
Copyright © Cambridge University Press 2018 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable