Sync the Hands & Head position&rotation realtime by 6-DOF VR contollers & headset?

sync the Hands & Head position&rotation realtime by 6-DOF VR contollers & headset?
Meanwhile, nomatter how strange poistion&rotation the VR Hands & Head are, the virtual skeleton mesh works and appears well which means for every input the Pose of the virtual skeleton mesh will have normal legal pose and the model and skin will never broke.(is the Constraint a solution to give limits then filter and do nothing if the input exceed the limit).
Thanks!