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A Three-Phase Electrostatic Clutch with Variable Mechanical Impedance Control for Soft Robotic Systems
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DOI：10.1002/advs.202510291.png)
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Abstract
En 中文
Various studies have explored mechanical impedance control strategies in soft actuators to enhance stability and precision, as the nonlinear characteristics of soft materials frequently lead to unwanted oscillations. Among these approaches, electrostatic (ES) clutches have shown promise for achieving friction-based mechanical impedance control; however, conventional ES clutches are limited by issues such as residual charge accumulation and stick-slip behavior, which compromise force stability and reliability over time. To address these limitations, this study introduces a three-phase ES clutch with variable mechanical impedance control, designed to enable continuous friction modulation and thereby reduce force degradation and oscillatory motion. Experimental validation was conducted through tensile tests and mechanical impedance applications in a vibration system. These findings suggest that the proposed three-phase ES clutch offers a robust and adaptable solution for friction modulation and mechanical impedance in soft robotic and wearable systems, effectively addressing the key limitations of conventional ES clutch technology.
Keywords:
three-phase electrostatic clutch
damping effect control
mechanical impedance control
phase modulation method
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