The prototype shows a NEA of about 85 μg/√Hz, a natural frequency of about 1.2 kHz and a maximum acceleration >5g.
The results of these tests showed NRB+SD, LRB and HRB were within the stable domain (not hardening) at 1×S2 (maximum acceleration 3.80 m s−2) input, and were nearly hardening at 2×S2 input.
The mainshock triggered an event of maximum acceleration 700 gal that caused severe damage to infrastructure and thousands of homes.
Fig. 3 System chart of a developed device Table 2 Specification of the training device Installation weight 1.5 kg Maximum stroke speed 100 mm/s Minimum resolution 0.01 mm Actuator maximum acceleration 82.9 m/s2 Rated thrust (total value) 21.6 N Standard deviation at training (angle) 0.41° Standard deviation at training (position) 0.22 mm.
For a given angular frequency, ω, the time-dependent antenna position, y, and the corresponding velocity, acceleration, and jerk can be expressed as follows: (5) where h is the amplitude of the input antenna position and selected to yield the maximum acceleration, |d2y/dt2| perienced in a real seismic event for a given ω.
The total time around the bases is about 16.7 seconds assuming maximum acceleration 10 feet per second per second, about 25percentt faster than following the baseline for 22.2 seconds (coming to a full stop at first, second, and third base), and about 6percentt faster than following a circular path for 17.8 seconds.
The y-axis shows differences (P < 0.001) for maximum acceleration, 5.48 m/s between groups; the minimum acceleration was 7.44 m/s between groups.
Mean (SE) value for manoeuvrability (estimated as the time taken for a bird to negotiate the maze test section) was 1.9 s (0.04); maximum acceleration, 8.1 m s−2 (0.21); and maximum velocity, 7.1 m s−1 (0.08).
High acceleration point-to-point motions are conducted on a linear-driving stage with a DOB-based controller and experimental results demonstrate that improved servo performance with a maximum tracking error of 2.0 μm at a maximum acceleration of 9.1 g (1 g = 9.806 m/s2).
Only one principal component was extracted; it was a reliable descriptor of flight performance, showing high factor loadings for all flight measures (eigenvalue = 1.55; factor loading for manoeuvrability = 0.74, maximum acceleration = 0.65 and maximum velocity = 0.76).
