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Latest posts from topic “Ritardo puro” Latest posts from topic “Ritardo puro” on “ElectroYou”. 2018-04-14T20:24:17Z https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578 Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p767383 dimaios 2018-04-17T14:42:22Z 2018-04-17T14:42:22Z
Foto Utentemikoile non capisco la tecnica risolutiva che stai cercando di adottare.

Per quanto riguarda il margine di fase basta considerare l'intersezione tra la G(s) ed il cerchio unitario.

Analizzando il modulo della [unparseable or potentially dangerous latex formula] si vede che :

[unparseable or potentially dangerous latex formula]

che vale 1 per \omega = 2.

[unparseable or potentially dangerous latex formula]

Da cui segue l'angolo.

Per l'intersezione con l'asse reale si ha :

[unparseable or potentially dangerous latex formula]

dopo alcuni passaggi


[unparseable or potentially dangerous latex formula]

Per annullare la parte immaginaria il primo angolo si ha per \frac{\omega}{2} = \frac{\pi}{2} ovvero \omega = \pi.

Per quel valore della pulsazione la parte reale vale :

[unparseable or potentially dangerous latex formula]
Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p767317 g.schgor 2018-04-17T09:40:14Z 2018-04-17T09:40:14Z
Quali sono i risultati?
Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p767209 g.schgor 2018-04-16T16:01:11Z 2018-04-16T16:01:11Z
Si, con Im(G(s))=0.
Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p767200 mikoile 2018-04-16T15:23:15Z 2018-04-16T15:23:15Z
potrei calcolare anche il margine di ampiezza ponendo la fase uguale a -\pi ?
Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p767124 g.schgor 2018-04-16T09:20:57Z 2018-04-16T09:20:57Z
Senza computer non puoi tracciare Nyquist, ma puoi calcolare
il margine di fase ponendo |G(s)|=1
Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p767096 mikoile 2018-04-16T00:15:39Z 2018-04-16T00:15:39Z
Ti ringrazio :) .. vorrei capire come fare per studiare la f.d.t senza l'uso di editor, perchè all'esame non ci è concesso usarne :(
Re: Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p766913 g.schgor 2018-04-15T10:17:40Z 2018-04-15T10:17:40Z
Perché usi Taylor?(nemmeno 8 termini sono sufficienti...)
Ecc0 il diagramma di G(s):
Forum180415a.gif
Ritardo puro https://www.electroyou.it/forum/viewtopic.php?f=8&t=73578#p766861 mikoile 2018-04-14T20:24:17Z 2018-04-14T20:24:17Z
Buonasera, avrei la seguente f.d.t di cui devo rappresentare il diagramma di Nyquist: G(s)=\frac{2*e^{-0.5s}}{s}. Per la rappresentazione procedo trasformando l'esponente in polinomio con Taylor G(s)=[unparseable or potentially dangerous latex formula].
Non mi ritrovo nel momento in cui divido parte reale e immaginaria, ottenendo: Re[\frac{-0.2*w}{w}] ( che coincide con l'asintoto :shock: ) +Im[\frac{-2}{w}]
Dove sto sbagliando ? grazie per l'attenzione.