Abstract

Human operators have the trend of increasing physical and mental workloads when performing teleoperation tasks in uncertain and dynamic environments. In addition, their performances are influenced by subjective factors, potentially leading to operational errors or task failure. Although agent-based methods offer a promising solution to the above problems, the human experience and intelligence are necessary for teleoperation scenarios. In this paper, a truncated quantile critics reinforcement learning-based integrated framework is proposed for human–agent teleoperation that encompasses training, assessment and agent-based arbitration. The proposed framework allows for an expert training agent, a bilateral training and cooperation process to realize the co-optimization of agent and human. It can provide efficient and quantifiable training feedback. Experiments have been conducted to train subjects with the developed algorithm. The performances of human–human and human–agent cooperation modes are also compared. The results have shown that subjects can complete the tasks of reaching and picking and placing with the assistance of an agent in a shorter operational time, with a higher success rate and less workload than human–human cooperation.

Highlights

  • Teleoperation helps perform long-distance interaction tasks and ensures operation safety

  • The master commands from the operator and agent will be fused through a Kalman filter (KF) before being sent to the slave side, where xm1 and xm2 represent the commands defined in Cartesian space from the human operator and agent, respectively

  • The average success rate of human–human cooperation mode arrived at 96.0%

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Summary

Introduction

Teleoperation helps perform long-distance interaction tasks and ensures operation safety. A network-based communication channel isolates a human operator from a potentially hazard interaction environment, which is regarded as the special case of cyber-physical systems. In this regard, teleoperation triggers the systemic revolution of human-in-the-loop operation [1], providing a universal platform to medical diagnosis [2]. The traditional single-master/single-slave (SM/SS) mode cannot meet the increased requirements of robustness and flexibility. Introducing another operator becomes a possible solution to extend teleoperation applications [16,17]. The reliability and effectiveness can be enhanced by MM/SS teleoperation, enabling fine operation and reducing operation error through collaborative decision making [18,19,20]

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