As a result of discussion with Shoda-san and Okutomi-san, the behavior of suspension is OK.
This means that from the results of LVDT TFs TMS VIS suspension shows single pendulum behavior.
In addition, the resonant frequencies are almost same as the model made by Uraguchi-san.
On the other hand, behaviors of Geophone at high frequency are strange.
Since no filters are adapted to Geophone signals, Geophone TF are ought to be inverse proportional to frequency.
However, their TFs are flat.
Some details will be described in the following link.
Also you can see more information about TMS-VIS here