Fig. A2.
Peak steady-state amplitude components of gravity, accleration, and combined gravitoinertial force (GIF) during the 0.45-Hz swing paradigm for a 10° tilt. As shown the peak y-axis gravity component depends only upon tilt angle and is independent of radius; the amplitude of the linear acceleration component increases with radius (at = rα). As shown graphically, the difference between the 2 yields the GIF (f = g − a). The y-axis contributions of gravity and linear acceleration cancel one another at a radius of −1.22 m at 0.45 Hz. The effect is similar for the 0.8-Hz paradigm. Line thickness represents mechanical vibrations and other noise. Note that the amplitude (maximum) is shown in this figure. Minimum values are the negative of those shown in this plot.