Standardized Testing and Quantitative Safety Assessment for Upper Limb Rehabilitation Robots: A Bionic Robotic...

Area of Science:

• Robotics
• Biomedical Engineering
• Rehabilitation Technology

Background:

• Standardized safety assessment tools for upper-limb rehabilitation robots are lacking.
• Existing methods may not adequately capture the complexities of robot-assisted therapy.
• Ensuring patient safety is paramount in the development of rehabilitation devices.

Purpose of the Study:

• To develop an integrated testing platform for upper-limb rehabilitation robots.
• To create a quantitative safety assessment framework for these devices.
• To demonstrate the platform's efficacy using a FlexoArm1 rehabilitation robot.

Main Methods:

• Construction of a 6-degree-of-freedom bionic arm with integrated sensors.
• Implementation of a fuzzy PID control algorithm for enhanced motion tracking.
• Establishment of a fuzzy multi-criteria safety assessment model using AHP and entropy weight method.

Main Results:

• The platform successfully replaced human subjects for range-of-motion, torque, and spasticity testing.
• Angular data from the platform closely correlated with Inertial Measurement Unit (IMU) measurements.
• The safety assessment model yielded a comprehensive score of 70.23, identifying specific design weaknesses.

Conclusions:

• The developed bionic-arm-based testing platform offers a practical solution for robot safety evaluation.
• The quantitative safety assessment methodology provides a basis for standardization and design optimization.
• This integrated approach enhances the reliability and safety of upper-limb rehabilitation robots.