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Newbie stuff, maybe....

Newbie stuff, maybe....

(OP)
Hi,

i have quite a few questions so here we go..
I am trying to write an applet in java that will have web based demonstrations of first and second order systems. the first orders systems where easy enough but coming to the second order systems is a little more difficult. I want the users to be able to enter the variables for the systems themselves so I need the java program to be able calculate the  time domain equation for the system specified, so the first question is

-any hints? is this too complicated?

also, any ideas to why when i use the "ilaplace" function for a transfer function it gives me a time domain response that produces a totally different output graph when giving it a set of t values??

i will leave the questions there, thanks for your help

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