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−2−1.5−1−0.500.511.52−1.5−1−0.500.511.5diagramma di Nyquist

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(58) ¤ X;`_`_f+`_Xlw`_X;Z+\]yrX |Šo%X;[.^_\]^jikX;yzlw`_Xik`_flpb;\]f+g!l=ikfwg%X;[amlp^_fr\]gMa;e%\  |±Ì¥Xp” € ‚<ƒˆ° ƒ2¥„ ¥ + Ë ¥ + ¥ Š q s ± – Æ ± Æ  ± qŠsÆ ½ ±  ½ ¸   ‚ ‹Š‰ ‹ ‹ o"|²¶g 1\]Z%{ à XY\]g 1\]Z%{Ë^_f+g%f`_\]vf+`jidl=ik\%Z+[]\!lpg%o!lpyrX;gik\"“<e!lp[]\idl=ik\u*\o%X;\[]e%f+Z+c%\%o%X;[][]Xš`klpo%\]a;\!o%X;[][~lxž?e%g%b;\]f+g%X † |± ƒˆ‡Š‰ q*|  ƒˆ‡ ‡ lp[˜uplp`_\~lp`_X:o%X;[v!lp`klpyrXik`_f ª§F© X ªÁÈ© { . . . . luogo delle radici 8. 6. 4. 2. 0. −2. −4. −6. −8 −12. −10. −8. −6. −4. −2. 0.

(59)   L CC*,@ @ *   *,@!& &(' *,DEGFIH @   * *,@A)1* '  C . . ;J.

(60) luogo delle radici 3. 2. 1. 0. −1. −2. −3 −4. −3. −2. −1. 0. 1. 2. 3.

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(62)

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