Question: relay with hysteresis in maple

hey all,

does somebody know how to make a relay with hysteresis? like this :http://en.wikipedia.org/wiki/Preisach_model_of_hysteresis

you somehow have to know from which side x is comming from, memory?

i've someting in a piecewise format, but de hysteresis is not working, becaus i don't know how to detect where x is comming from (from the right or the left)

 

 

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