Organizations: Faculty of Information Technology and Electrical Engineering, University of Oulu, 90570 Oulu, Finland · Research Unit of Health Sciences and Technology (HST), Faculty of Medicine, University of Oulu, 90220 Oulu, Finland · Research Unit of Disease Network, Faculty of Biochemistry and Molecular Medicine, University of Oulu, 90220 Oulu, Finland · School of Information Science and Engineering, Provincial Key Laboratory of Informational Service for Rural Area of Southwestern Hunan, Shaoyang University, 422000 Shaoyang, China · College of Computer Science and Engineering, Jishou University, 416000 Jishou, China · Department of Computer Science, University of Exeter, Exeter, United Kingdom · Department of Information Technology and Electrical Engineering, University of Naples Federico II, Naples, Italy · VTT Technical Research Centre of Finland, 90570 Oulu, Finland
Robotic haircutting requires controlled tool motion near the head while simultaneously accounting for communication, visual feedback, tool actuation, and interruption handling. Existing studies still lack an operator-in-the-loop reference for analyzing these coupled behaviors before human trials or stronger autonomy. This paper presents TeleHairing, a closed-loop teleoperation architecture for mannequin-based robotic haircutting evaluation under local, relay, and remote deployment conditions. Logged timing shows that the main remote latency increase occurs before the robot-side control endpoint: overall timing reached 190.5~ms in remote mode, while robot-side command queue, control processing, and control-to-robot timing remained similar across modes. Trajectory analysis shows that the larger remote command-following error was dominated by the terminal withdrawal segment rather than accumulated uniformly over the path; excluding this segment reduced remote root-mean-square error (RMSE) from 45.1 mm to 9.6 mm. Detection-loss trials further show that rebase events resumed motion without a large target jump under the tested condition. These results clarify how deployment, execution, and interruption affect the robotic haircutting teleoperation loop, providing a quantitative reference for future autonomy, safety, and user-facing studies.
Figures & tables
Figure 1: Architecture overview of TeleHairing. On the operator side, a phone camera supports pose estimation, and teleoperation messages are routed either directly or through a cloud relay to the robot-side control server. The control server coordinates manipulator and tool commands, while a feedback camera streams video back to the browser client to close the teleoperation loop. Orange numbered markers denote send-side or stage-start timestamps, whereas purple numbered markers denote receive-side or stage-end timestamps. The numbered pairs identify the timestamped timing segments reported in Table 2 .
Figure 2: Robot-side clipper integration used in TeleHairing.
Item
Configuration
Robot platform
UR10e 6-degree-of-freedom manipulator
End effector
Commercial hair clipper mounted through a dedicated 3D-printed adapter and electrically switched through a relay and STM32 interface
Control command interface
RTDE-based Cartesian command streaming
Controller frequency
30 Hz robot-side Cartesian command updates
Velocity limits
0.05 m/s translational limit and 15 deg/s rotational limit
Visual reference
Single AprilTag reference marker: tag36h11, ID 0, physical tag size 75 mm
Table 1: System and experimental configuration used in the TeleHairing evaluation.
Timing segment
Timestamp pair
Local mode
Relay mode
Remote mode
Browser → master
1–2
7.4 ± 2.2
9.3 ± 4.0
1.3 ± 3.8
Master proc
2–3
0.1 ± 0.3
0.1 ± 0.6
0.2 ± 0.4
Master → cloud
3–4
—
14.4 ± 2.7
116.9 ± 2.0
Cloud proc
4–5
—
0.0 ± 0.2
0.0 ± 0.2
Cloud → control
5–6
—
5.5 ± 2.2
5.7 ± 4.0
Master → control
3–6
1.1 ± 0.8
—
—
Table 2: Stage-wise communication timing across the three TeleHairing modes. Values are reported in milliseconds.
Figure 3: Representative command and measured trajectory overlays for the three TeleHairing modes.
Mode
N
RMSE (mm)
Peak error (mm)
Local mode
10
6.7 ± 1.7
27.3 ± 12.9
Relay mode
10
5.1 ± 0.9
19.6 ± 6.5
Remote mode
10
45.1 ± 17.1
223.6 ± 80.8
Remote mode (first 90%)
10
9.6 ± 3.0
34.9 ± 10.5
Table 3: Command-following trajectory error across the three TeleHairing modes.
Figure 4: Detection-loss recovery behavior in the dedicated trials. Panel (a) shows a single recovery event with the tracking gap aligned to the rebase instant; panel (b) shows the post-recovery median and interquartile displacement profile; and panel (c) shows the relation between tracking-gap duration, accumulated hold drift, and the first resumed command step.
Indicator
Value
Recorded events
23 events from 5 trials
Effective tracking gap
1.97 ± 1.25 s; range 0.43–5.47 s
Missing updates
53.61 ± 34.71
Measured hold drift
6.47 ± 1.50 mm
First resumed command step
0.64 ± 0.14 mm
Table 4: Quantitative indicators for detection-loss recovery.
In robot teleoperation, haptic feedback can be used to help human operators accomplish dexterous manipulation tasks. However, existing haptic feedback methods try to replicate high-fidelity sensory haptics that are felt in real world interactions, which are constrained by the sensing and feedback hardware capability and may lead to higher workload. To addresses these limitations, this work introduces semantic haptics for teleoperation, which uses abstract haptic patterns to convey critical information about robot states. We categorize robot states into "Confirmations" and "Exceptions", implement a modular haptic rendering pipeline in robot simulation, and deliver semantic haptic feedback to operators through pneumatic and vibrotactile wristbands. This simplifies hardware requirements and enables one-to-many mappings between haptic patterns and robot states. Through three evaluation studies, we identify the most effective semantic haptic design for a common pick and place teleoperation task and compare semantic haptics to other teleoperation feedback approaches including sensory haptics and visual feedback. Results suggest that while semantic haptics performs similarly as other feedback in unimanual tasks, it achieves superior performance in bimanual tasks, with reduced task workload, increased situational awareness, and overall preference.
Direct hand-driven teleoperation maps an operator's hand motion to robot end-effector commands at every frame, enabling precise control, but it requires constant monitoring and correction during approach, grasp, and placement, which can be slow and fatiguing. For repetitive pick-and-place tasks, supervisory (goal-based) teleoperation simplifies this process: the operator specifies goals/waypoints, and the robot executes the motion using planning algorithms. Yet, this introduces latency, as the robot must wait for the next command before it can plan and act. "How can we reduce robot reaction time while lowering operator workload?" To tackle this question, we present AHEAD, a real-time VR teleoperation system that anticipates operator intent to enable proactive, hand-driven control. In a digital twin, the operator performs pick-and-place naturally, using hand motion to convey high-level commands rather than a continuous robot trajectory. AHEAD processes a short window of 3D hand and head signals together with scene context through an attention-based classifier to predict the intended grasp object and placement slot. A state machine converts intent predictions into stable robot goals, enabling early motion while remaining stable under noisy predictions and corrective hand movements. AHEAD's intent prediction module achieves Top1 accuracy: 76% for grasp objects and 76% for target slots. Moreover, our user study shows AHEAD reduces robot reaction latency by 0.6 s (object) and 1.4 s (slot) relative to baselines. Participants also reported lower operator load, indicating faster robot responses while maintaining low operator effort in practice.
Seok Joon Kim, Junho Lee, Federica Spinola +2
Georgia Institute of Technology. · Neuromeka Ltd. · INRIA. +1
We present a teleoperation system that enables a single operator to perform construction tasks on a Unitree G1 humanoid, combining extended reality (XR) based upper body control with pedal-based locomotion to enable simultaneous manipulation and locomotion. Motivated by persistent labor shortages, hazardous working conditions, and challenges in humanoid autonomy, we investigate teleoperation as a practical near-term approach for reducing physical strain on workers while generating high quality demonstration data. We evaluate the system on two representative construction tasks drawn from O*NET occupational database, and report task success and completion time relative to a manual baseline. The system achieved 100% success on tool transport and 80% success on surface painting, with teleoperation requiring substantially more time compared to manual execution.
Parastoo Ali Pour, David R. Martin, Chang Min Hur +6
Department of Mechanical and Aerospace Engineering, University of California at Irvine, Irvine, CA 92697 USA · Department of Electrical Engineering and Computer Science, University of California at Irvine, Irvine, CA 92697 USA · Professional Master of Embedded and Cyber-physical Systems Program, University of California at Irvine, Irvine, CA 92697 USA