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Distinctions in Weight Perception between Constrained and Unconstrained Lifting of Objects

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Abstract:

We made two objects (hollow metal cylinders) with identical appearance. One was called the constrained object; another was called the unconstrained object. Human subjects lifted the constrained and unconstrained objects separately for various experiment conditions. We compared human’s weight perception between the two types of objects. Results showed that weight perception between constrained and unconstrained lifting was almost the same. In our previous research, we developed a power assist system for lifting objects and determined a psychophysical relationship between actual and perceived weights for the objects lifted with the system [1]. The perceived weights were 40% of actual weights. However, the objects lifted with the system were constrained objects (as they were tied to the force sensor) that might affect the accuracy of the relationship. The results of this paper confirm that the constraint does not affect weight perception too much, which reconfirms that the psychophysical relationship between actual and perceived weights derived in our previous research was correct [1].

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Periodical:

Advanced Engineering Forum (Volumes 2-3)

Pages:

273-276

DOI:

https://doi.org/10.4028/www.scientific.net/AEF.2-3.273

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Online since:

December 2011

Authors:

S.M. Mizanoor Rahman, Ryojun Ikeura, Soichiro Hayakawa, Hao Yong Yu

Keywords:

Assistive Robotics, Constrained Lifting, Human, Object Lifting, Psychophysics, Safe Human-Robot Interaction, Unconstrained Lifting, Weight Perception

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References

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