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Force and Position Control in Humans - The Role of Augmented Feedback
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Force Anticipation and Its Potential Implications on Feedforward and Feedback Human Motor Control
Hideyuki Kimpara1,2, Kenechukwu C Mbanisi2, Zhi Li2
1116612 Toyota Motor North America R&D, Ann Arbor, Michigan, USA.
Human Factors
|March 11, 2020
Summary
Human force anticipation influences pushing performance, with overanticipation leading to overshoot. The study reveals how expected loads impact motor control, offering insights for human-robot interaction.
Area of Science:
- Human motor control research
- Biomechanics and robotics
Background:
- Human motor control relies on anticipated workload for force planning, especially in rapid tasks.
- Motion and force responses are influenced by anticipated resistive forces developed through learning.
Purpose of the Study:
- To investigate the impact of human force anticipation on a load-pushing task.
- To analyze how informed and actual loading weights affect pushing performance and motor responses.
Main Methods:
- Conducted a load-pushing experiment with 9 participants over 135 trials.
- Varied workload masses (0.2-5 kg) and manipulated workload display accuracy to influence anticipation.
- Collected motion, force, and electromyography (EMG) data from muscle groups.
Main Results:
- Overanticipation occurred in over 80% of trials, often resulting in overshoot, especially with lighter actual loads.
- Pushing behaviors were categorized into feedforward-dominant and feedback-dominant responses based on response timing.
- Performance in a given trial was influenced by the condition of the preceding trial.
Conclusions:
- The initial peak pushing force consistently increased with the anticipatory workload.
- Findings enhance understanding of human motion control mechanisms.
- Results have applications in simulating human-system interactions, such as in intelligent vehicles.
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