- #1
yaro99
- 75
- 0
Homework Statement
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Homework Equations
Listed under 2.1 in the image above.
This is the only relevant equation that I'm aware of, but I'm almost sure that there is something else I need to know before I can solve the problem.
The Attempt at a Solution
I tried solving for the preamplifier first, then I realized I was just running around in circles and not actually solving anything.In order to get V_e(s), I need to first find the output of the first potentiometer and subtract it from that of the second one.
output for first potentiometer: K_pot*θ_i(s)
output for second potentiometer: K_pot*θ_a(s)
V_e(s) = K_pot(θ_i(s)-θ_a(s))
Now, V_p(s) = K*V_e(s) = K*K_pot(θ_i(s)-θ_a(s))
Transfer function of preamplifier: [K*K_pot(θ_i(s)-θ_a(s))]/[K_pot(θ_i(s)-θ_a(s))] = K
Clearly the transfer function is not the same thing as the function for the physical block, so I must be doing something wrong here. I just don't see how I can fill out the table using just the equation I was given.