How Do You Model an LVDT Using Differential Equations and Transfer Functions?

[LM741]

hello all!

Does anybody have any idea how i get get a transfer function for a Linear Variable Differential Transfromer (LVDT).

I thought about generating a differential equation to model the LVDT and then taking the laplace transform of this. My problem is: I am really stuggling to model the system with a diff eq - does anynody have an idea where i should start.
Please help.

Thank you
John

 

[NoTime]

I had to look up what a LVDT was.
Does this help?
http://www.efunda.com/DesignStandards/sensors/lvdt/lvdt_theory.cfm