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Evaluate mechanical design criteria for ankle rehabilitation

Engineering Plans

Method

  • Longitudinal study of 53 designs (37 platform, 16 wearable)

  • SolidWorks Analysis of 2 representative designs

    • Mass

    • Inertia

  • Interview with Physiotherapist

Platform-based preference

Superior for sprain rehabilitation due to versatility, high torque, and stability

Wearable design referenced for user-centric features

Black Speaker
Notable Studies Analyzed

SolidWorks Analysis

Modeled exemplary studies and measured mass and inertia through SolidWorks motion simulation

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Interview with Physiotherapist

Alex Lau

Design use case must be determined after swollen stage of ankle

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Must be comfortable for use

Reduce intimidating features

physio.jpg

Design Criteria

  • Rotation Center Alignment: Misalignment ≤2 mm

  • Degrees of Freedom: 2 DOF

  • Motion Range: 0°–40° plantarflexion, 0°–30° dorsiflexion, 0°–30° inversion, 0°–20° eversion

  • Torque Capacity: ≥45 N·m dorsiflexion, ≥20 N·m inversion/eversion

  • Compactness: ≤1m^2

  • Low Inertia: Moving platform mass ≤5 kg

  • Comfort: Padded interfaces (≥1 cm); comfort score ≥4/5

  • Portability: Device weight ≤20 kg for potential home use

  • Feedback: Real-time force/position feedback with data logging

  • Height of the device 

  • Use Case (Sitting or Standing)

  • Padding or cushion

  • Adjustable Foot Size 

ISDN2001/2002: Second Year Design Project

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