With Hatoya-san,
With Hatoya-san,
we are investigating and trying to improve the damping of the torsion mode for the SR3 chain. So our first attemp was to move the F0 in vertical in order to get the damper ring closer or further from the SF Cu ring.
But last week we found that the movement in vertical of the F0 produces a large coupling to the TM yaw motion for reasons we still do not know. So is difficult for us to get the data we need.
That is why we are planning to change the strategy and just move the 3 rods of the damper ring at different position. (which takes longer).
At last and continuing the investigation and for completeness, I have tracked down the contribution from the BF, the SF and the F0 to the TM yaw. As you can see in the graph, all the vertical filters produce coupling to the TM yaw motion, but in different ammounts. We are also planning to move the BF or/and SF to compensate the coupling from the F0. So we can continue the measurements of the torsion mode of the SR3.
With Hatoya-san,
we are investigating and trying to improve the damping of the torsion mode for the SR3 chain. So our first attemp was to move the F0 in vertical in order to get the damper ring closer or further from the SF Cu ring.
But last week we found that the movement in vertical of the F0 produces a large coupling to the TM yaw motion for reasons we still do not know. So is difficult for us to get the data we need.
That is why we are planning to change the strategy and just move the 3 rods of the damper ring at different position.
At last and continuing the investigation and for completeness, I have tracked down the contribution from the BF, the SF and the F0 to the TM yaw. As you can see in the graph, all the vertical filters produce coupling to the TM yaw motion, but in different ammounts. We are also planning to move the BF or/and SF to compensate the coupling from the F0. So we can continue the measurements of the torsion mode of the SR3.
