A soft and lightweight fabric-based pneumatic interface for multimodal fingertip tactile feedback

2026-04-01

AI Summary

This study addresses the challenge of achieving high-performance, lightweight, and wirelessly portable haptic feedback in wearable fingertip interfaces. The authors propose a fabric-based pneumatic actuation approach, utilizing thermoplastic polyurethane-coated textiles shaped via CNC heat sealing to create a flexible, four-chamber pneumatic fingertip interface weighing only 2.1 grams. Integrated with a wrist-worn wireless control unit, the system delivers multimodal tactile feedback. This work represents the first application of fabric-based pneumatic actuation to a lightweight, low-cost fingertip haptic device that simultaneously achieves high force output, displacement, and bandwidth while significantly enhancing wearability. Mechanical characterization and psychophysical experiments with 15 participants demonstrate classification accuracies exceeding 90% across three tactile modalities: contact configuration, sliding direction, and vibration frequency.

Abstract

Wearable fingertip haptic devices are critical for realistic interaction in virtual reality, augmented reality, and teleoperation, yet existing approaches struggle to simultaneously achieve adequate tactile output, low mass, simple fabrication, and untethered portability. Here we show that fabric-based pneumatic actuation can address this gap. Our device comprises four pneumatic chambers fabricated from thermoplastic polyurethane-coated fabric via computer numerical control heat-sealing, yielding a soft, conformable interface weighing 2.1 g that operates untethered with a wrist-mounted control unit. Mechanical and dynamic characterization confirms that the fabric actuators produce sufficient force, displacement, and bandwidth for fingertip tactile rendering. A psychophysical study with 15 participants demonstrates classification accuracy exceeding 90% across three distinct tactile modes -- contact configuration, directional sliding, and vibrotactile frequency. These findings establish fabric-based pneumatic actuation as a viable technology route for lightweight, low-cost, and multimodal fingertip haptic interfaces.

Problem

• fingertip haptic devices
• tactile feedback
• lightweight
• untethered portability
• multimodal

Innovation

• fabric-based pneumatic actuation
• multimodal tactile feedback
• lightweight haptic interface
• untethered wearable
• fingertip haptics