Jesse Gohl

20 Reputation

2 Badges

15 years, 128 days

MaplePrimes Activity


These are answers submitted by Jesse Gohl

I'm trying a similar thing but the intermediate voltages (in my case Va, and Vb) are not being removed.  Here are my equations:

eq := Vo = K*(Vb-Vo), i3 = C3*Vb*s, Va-Vb = R3*i3, i2 = C2*s*(Vo-Va), Vi-Va = R1*i1, i3 = i1+i2
sol := solve({subs(eq[1 .. 5], eq[6])}, {Vi, Vo})
sol1 := eval(Vo/Vi, sol)
form := a*(s^2+b*s+c)/(s^2+d*s+e)
sol2 := solve(identity(sol1 = form, s), {a, b, c, d, e})
Vo/Vin = eval(form, sol2)

I'm looking for Vo in terms of Vi and the R, and C parameters but Va and Vb.  There seems to be a solution when I work it out manually using subs and solve commands.  Any help is much appreciated.

 

I haven't given it a try yet but this looks very helpful. Thanks very much.
Oh, sorry about that. Now I see how the file sharing works. Here it is (I think): Download 7210_planetary_eqs.mw
Page 1 of 1