2024 Volume 60 Issue 2 Pages 113-124
In this study, the discussion centered on operator’s impression of lifting operations while focusing on something strange felt by the operator when using power assist devices. We conducted an impression evaluation experiment by semantic differential method on the lifting operations with some assist force applied using the device simulating power assist devices. First, as a result of analyzing the experimental results by principal component analysis, the characteristics of the operator’s impressions on the lifting operations were summarized into three categories. The first was a sense of safety, the second was a sense of operation and the third was a sense of passive. Next, probability models based on graphical modeling were derived using partial correlation coefficients among the evaluation items. Under the conditions of this experiment, we found that something strange was correlated with impressions with strong emotional components when the assist force on the object was larger. The findings of this study suggest impressive requirements for object lifting operations using power assist devices.
