ETO Online Quiz Sheets.

Jugurtha said:

Quizz V7.0 by Mr Al (Electronic and Electrical). Score = 7

Here's what I got wrong:

Q2 (Transformers), Q6 (LCD) and Q10.

It was a nice test. Just per curiosity, for the question on State Space. Would you go for Laplace and find the inverse matrix of (p-IA) + Discretization (sampling of 1ms to find F and H), then Commandability matrix Wc and find the Command Vector Uc . Or did you just calculate it from the equation of a charging capacitor and replaced t with 10 ms ? (Knowing that if you do that, you'll find 95.162e-3).

Doing that with matrix calculations isn't worth it for a first order system in my opinion, so I guess you did it another way that's better and faster.

Thanks,

Click to expand...

Hi,

Sorry i didnt see your post until just now. Eric posted so looked at this thread again.

Im not entirely sure i understand your question, but it sounds like you are wondering how the result came out to be what one of the multiple choices indicates.
In that case, the question was to find the response at the given time USING EULERS METHOD, not some other method which could quite conceivably give a more accurate result or at the very least, different. With the chosen method the idea was not to get a perfectly accurate result, but to use that method to obtain the result. When that is done, the result will come out to one of the multiple choice results shown. The idea here is numerical simplicity over perfection, which gets some people started and from there they go on to discover more accurate numerical methods.

hi,

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