Robust Control of a New Asymmetric Teleoperation Robot Based on a State Observer

Abstract

This study is mainly about the designation of a new type of haptic device and an asymmetric teleoperation robot system. Aiming at the problems of tracking and transparency of an asymmetric teleoperation system, a robust control algorithm based on a state observer was proposed. The Haptic Device was designed and was chosen as the master-robot of the system. The Baxter dual-arm robot was chosen as the slave-robot of the system. The simulation experiment of robust control based on a state observer of the asymmetric teleoperation robot was carried out. The experiment results showed that the maximum values of displacement tracking errors in three directions x, y, and z are 0.02 m, 0.01 m, and 0.015 m, respectively. Compared with single- joint PID control, the performance of the new control algorithm is improved. The force feedback experiment on the real asymmetric teleoperation robot system was carried out. The results showed that the force feedback wave is consistent with the actual situation and showed that the robust control algorithm proposed is superior to PID. Therefore, the algorithm perfectly satisfied the system. The experiment parameters also demonstrate that the haptic device satisfies the design requirements of the asymmetric teleoperation robots system and the industry standards.

Sensors Allocation and Observer Design for Discrete Bilateral Teleoperation Systems with Multi-Rate Sampling

“…In [ 3 ], a modified wave variable compensation has been utilized to passivate the delayed communication channel. In [ 4 ], a robust controller based on a state observer is implemented on a haptic device and an asymmetric teleoperation system. The results demonstrate better tracking performance for force signals.…”

Design of Synchronization Tracking Adaptive Control for Bilateral Teleoperation System with Time-Varying Delays

“…Using teleoperation robots to replace humans to work in the high cleanliness laboratory can avoid the operator from polluting the experimental area and affecting the experimental results. The teleoperation system is a typical network robot system, which has also been widely practiced in many engineering fields, such as space exploration [ 1 ], deep-sea operation [ 2 ], telesurgery [ 3 ], disposal of hazardous materials [ 4 ], and so on. In the teleoperation system, the human operator can control and operate the remote slave robot through the master robot and force feedback devices.…”