Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics

Figure 5

Natural frequencies of the five-degree-of-freedom linear model with respect to the seat pan, backrest, and head angle (dotted vertical green line: baseline angle; blue line in the graph in the second column of the first row: experimental results [35]; the top through the bottom rows represent the first through the fifth modes, respectively).