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Related Experiment Video

Updated: Jun 11, 2026

Experimental Methods to Study Human Postural Control

Experimental Methods to Study Human Postural Control

Published on: September 11, 2019

Concerted control framework for human-exoskeleton co-adaptation using ground reaction forces.

Vahid Firouzi^1,2, Arjang Ahmadi¹, Dennis Haufe¹

¹Lauflabor Locomotion Laboratory, Centre for Cognitive Science, Sport Science Institute, Technical University of Darmstadt, Darmstadt, Germany.

Wearable Technologies

|June 10, 2026

Summary

This summary is machine-generated.

This study introduces a novel control strategy using ground reaction force (GRF) feedback to synchronize human movement with wearable assistive devices like the BATEX exosuit, improving walking performance and reducing energy cost.

Keywords:

control exosuit human motor control human-in-the-loop-optimization

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Area of Science:

Biomechanics
Robotics
Human-Machine Interaction

Background:

Coordinating human neuromuscular systems with wearable assistive devices is crucial for effective gait enhancement.
Existing control strategies often rely on centralized or distributed systems, presenting limitations.

Purpose of the Study:

To develop and validate a concerted control strategy synchronizing biological and artificial actuators using shared feedback.
To investigate the role of ground reaction force (GRF) as a coordinating signal for human-exosuit interaction.

Main Methods:

Implementation of Force Modulated Compliance (FMC) to adjust joint stiffness based on real-time GRF input.
Application of the GRF-informed controller in an active soft biarticular thigh exosuit (BATEX).
Testing the system in human walking experiments to assess gait performance and coordination.

Main Results:

The GRF-informed controller significantly increased preferred walking speed.
The system advanced the transition point from walking to running.
A notable reduction in metabolic cost was observed during human-exosuit interaction.

Conclusions:

GRF-based control effectively enhances human-exosuit coordination by aligning assistance with natural gait dynamics.
This bioinspired approach provides a scalable framework for real-world locomotion support.
Harmonizing human and robotic contributions through shared feedback is key to improving wearable assistive device performance.