Recent content by Gremlin

Hi, would it be possible to run through the steps of getting from (((-IRf)-0) / R2) + (((-IRf) - V) / R1) - I = 0 through to the above? Initially I would tend to x R1 to remove one of the denominators and get to: (-IRfR1/R2) + (-IRf - V) - IR1 = 0 but then I forget. I usually use my Stroud...

Hopefully this is the correct forum. As I've gone from cad technician to electrical designer I've become accustomed to using the specialist software that has been available in the office, which for LV cable calcs is amtech prodesign. I haven't really been using amtech to it's full capacity - i...

Ok thanks, i shall have another look.

I estimated ζ=2 based on the graph in the notes, it's all i could think to do.

I'm still trying, and failing, to nail this. Can someone tell me where the attached goes off course please? There's not a lot to it, but already if n=3 i don't get 1/pi.

Can anyone offer the any assistance as to what axis to use when plotting the fundamental and the 2 harmonics? I'm unsure how to get them to 'overlap' so i can subtract them.

I've got this question to a point where I'm happy with it. Thanks for your time.

I'm not sure in all honesty - that it's the same as the input?

So for a & b the graph will show no overshoot - but for c it will as ζ >1. Can we plot these on a graph using the same axis as in my attachment in #8? The only thing that concerns me is the ωo 2 x 103 in B rather than ωo 1 x 103 in the other 2 transfer functions.

It means it's over damped and there is no overshoot.

Look at pages 48 & 49 of 4-1 - i think the answers are there - although I'm still trying to pick the bones out of it myself.

I can see the time to peak overshoot which = π/ωd where ωd = ω0√1-ζ2

No it doesnt.

Sorry i see what you're saying now. I shall try n=3 in what i have now and hope for 1/pi

I am trying to generate an expression for an - that's what I'm halfway through. It looks to be in the right ballpark, but I've hit an impasse collapsing the expression. My working out is in post #28. I think i am losing the will to live!