Spurious shear force on the adhesive patch between release tip and TM with one DOF TM suspension. (a) Possible static contact force applied between TM and release tip before the release. (b) Possible dynamic contact force during actuation of the release tip.
Photograph and schematic overview of the transferred momentum measurement facilty (TMMF) operated at the University of Trento, Italy. The items indicated by dashed lines are present only in some of the versions of the TMMF. Further description thereabout is given in Sec. IV.
Maximum standard deviation of 10 measurements required to assess the momentum compliance to the requirement.
Three-dimensional solid model of the double pendulum configuration of the release tip subsystem.
Three-dimensional solid model of the stirrup configuration of the release tip subsystem.
Three-dimensional solid model of the rigid configuration of the release tip subsystem.
Frames taken at different magnifications with the high-speed camera illustrated in Fig. 1 during the retraction of the release tip, showing the side view of both the release tip (right) and the contact region of the neighbouring TM (left). The preceding phases of the release sequence (release tip approach towards TM and preload) are not shown for the sake of clarity. The diameter of the release tip is 2 mm. Acquisition rate 1 kHz, time interval between successive frames is 1 ms. (a) double pendulum, (b) stirrup, and (c) rigid configuration.
(a) Displacement, (b) velocity, and (c) acceleration time profiles of a typical release experiment made with the rigid setup configuration. The oscillations after the main acceleration peak are due to the excitation of TM vibration modes caused by the rupture of the adhesive junction.
Maximum impulse in [N s] over ten tests per each of the explored tilt and yaw angle pairs with the rigid release tip configuration. The mesh is colour interpolated over smaller angular steps than the actual one (0.3°).
Maximum impulse and adhesion rupture force measured with the three release tip subsystems, which have been implemented in the TMMF during its evolution.
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