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Hello,
suppose there is a bessel filter (2nd order low pass) which has the following transfer function:
\[ TF_{Bessel}(s) = \frac{a_1}{a_1+b_1s+s^2} \].
I apply an input voltage of the form:
\[V_{in}(s) = \frac{V}{s} \]
I would like to find an anlytic description of the bessel output...
Thanks for explaining the technique! It works quite well, however there are problems when I try reconstruct a signal containing high freuquencies. The reconstructed signal exhibits strong oscillations. Are there certain constraints with regard to time resolution?
Could you recommend any...
I've been trying to make the inverse transfer function proper by adding negative poles far away from the imaginary axis, i.e. multiplying by (s+1E6)^2.
This worked well for the simulation containing only the bessel filter which has 2 poles. I am able to get a pretty good reconstruction of my...
Since any of the transfer functions I estimated has zeros in the right half plane, I guess the approach with the transfer function in the negative feedback is not going to work, because the will turn into poles and cause unbounded oscillations. Correct?
I did also try a Simulink model with...
Ok so below I attached the circuit model. This model is a rough estimate of what the system really looks like. In order to re-obtain the input signal (which is the current at the amp-meter, a mono-exponential decay) I first want to find a solid method for this model before I apply it to the...
Thanks for your reply! Could you comment on the difference between frequency response and transfer function? As far as I understand the one is based on Fourier Transform while the other one goes back to the Laplace Transform.
Why is it not possible to describe the transfer characteristics of a...
Hi,
I have an eletronic circuit, whose exact components are basically unknown. I do know however the input and output signals as vectors. My goal is to obtain the input signal for an arbitrary output signal. My approach so for has been to apply a certain input, measure the output and then...
How do I know if I obtained the real transfer function of my system? It seems the results are decent for various numbers of zeros and poles (>99% for e.g. 2 zeros 4poles AND 2 zeros 3 poles).
Hello,
I have the transfer function of a system in the s-domain. For a given output I want to obtain the input. The most natural way to me seems to multiply the output with the inverse of the
transfer function. The problem in implementing this e.g. in Matlab is, that the inverse transfer...
Thanks for your reply. The System Identification Toolbox is indeed very interesting. For my task I want - after acquiring the transfer function - to obtain the input of my system for an arbitrary output vector.
I.e., I have the transfer function in the laplace domain as an analytic function and...
Hey Guys,
so I have an electronic system, whose exact structure is unknown. I can however measure what it does to a specific input. This means I have two vectors, which represent current/voltage signals for the input/output. Theoretically I could represent the transfer function of the system in...
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