I have a simple animation rig, a face is wearing a helmet. The helmet is a child of the face. I have applied the basic wiggle expression to the head so that I get basic face movement, I want the helmet to have a secondary animation in position and rotation so that it doesn't look like it is stuck to the head.
I have currently applied wiggle expressions to the position and rotation of the child as well, however this is just a workaround. I want the helmet to slightly overshoot the expression applied to its parent.
Can someone please tell me how to achieve this using an expression?