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    Formal verification, using Satisfiability Modulo Theories (SMT), improves myocontrol reliability for upper-limb prosthetics. This technology enhances the conversion of biosignals into prosthetic commands, addressing a key challenge in assistive robotics.

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    Area of Science:

    • Assistive Robotics
    • Biomedical Engineering
    • Formal Methods

    Background:

    • Myocontrol for upper-limb prosthetics aims to translate biosignals into prosthetic control commands.
    • Traditional surface electromyography (sEMG) faces challenges in reliably detecting user intent, leading to control mismatches.

    Purpose of the Study:

    • To investigate the use of formal verification, specifically Satisfiability Modulo Theories (SMT), to mitigate the mismatch between user intent and myocontrol system response.
    • To compare the reliability and performance of a standard myocontrol system against systems enhanced with non-formal and SMT-based techniques.

    Main Methods:

    • Two target achievement control tests were conducted with eighteen intact subjects.
    • A standard myocontrol system was compared against two modified systems: one using a non-formal technique and another employing SMT for rigorous property enforcement.
    • Performance was evaluated based on reliability and computational resource requirements.

    Main Results:

    • Both enhanced myocontrol systems demonstrated improved reliability compared to the standard system.
    • The SMT-based system achieved rigorous property enforcement with only a modest increase in computational resources.
    • The non-formal technique offers easier implementation in existing systems, potentially boosting reliability.

    Conclusions:

    • Formal verification using SMT is a viable approach to enhance the reliability of myocontrol systems for upper-limb prosthetics.
    • SMT-based myocontrol offers a robust solution for aligning prosthetic response with user intent.
    • Both formal and non-formal techniques show promise in improving prosthetic control, with SMT providing stronger guarantees.