Upfront let me say I know very little of LVDTs and have never used them, but they are a very elegant way of sensing linear displacement.
When you say they are inherently frictionless....although simple, they have moving parts so there must be some friction? And in wet/icy conditions they could get frozen?
Were I to encounter the problems of crosstalk I would try something like using different excitation frequencies for each LVDT, and have a narrowband filter in each signal conditioner. Are solutions like this used? But Alliance's solution is also clever. And I suspect thay know more than me about these things :-)
As we unveil EE Times’ 2015 Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. Panelists Dan Armbrust (investment firm Silicon Catalyst), Andrew Kau (venture capital firm Walden International), and Stan Boland (successful serial entrepreneur, former CEO of Neul, Icera) join in the live debate.