A passive T/V-beam absorber architecture for single-axis experimental hand tremor attenuation

Area of Science:

• Biomedical Engineering
• Mechanical Engineering
• Neurology

Background:

• Hand tremor is a significant motor symptom in neurological conditions like Parkinson's disease and essential tremor.
• Existing active tremor-suppression devices often require external power and complex control systems.

Purpose of the Study:

• To design, tune, and experimentally evaluate a passive mechanical absorber for tremor attenuation.
• To assess the effectiveness of T- and V-beam configurations for tremor reduction.

Main Methods:

• A single-axis, 1-degree-of-freedom (DOF) tremor simulator was used for experimental validation.
• Key design parameters (mass, stiffness, geometry) were optimized using a constrained parametric tuning procedure.
• Frequency-domain (power spectral density, transmissibility) and time-domain (displacement reduction) metrics were employed.

Main Results:

• The passive mechanical absorber demonstrated a reduction of up to 85% in steady-state peak-to-peak displacement.
• The double V-beam configuration showed superior single-axis attenuation compared to a single-actuator setup.
• Effective tremor attenuation was observed in the 3.0-6.5 Hz frequency range, relevant to Parkinsonian and essential tremor.

Conclusions:

• The passive mechanical absorber is a promising, power-free alternative for tremor management.
• The double V-beam configuration offers enhanced single-axis tremor attenuation.
• Further development is warranted for wearable applications in tremor management.