donc voila pour commencer mes réponses:
1) H(s)=g1g2g3g4/(1-g3g4h1+h2g2g3+h3g1g2g3g4)
2) H(s)=(46s+14s²+12)/(7s³+20s²+6s)
H(s)=(0.393/(s+0.34))+(2/s)+(0.393/(s+2.516))
réponse impulsionnelle=H(t)=2+0.393*expo(-0.34t)-0.393*expo(-2.51t)
1) H(s)=g1g2g3g4/(1-g3g4h1+h2g2g3+h3g1g2g3g4)
2) H(s)=(46s+14s²+12)/(7s³+20s²+6s)
H(s)=(0.393/(s+0.34))+(2/s)+(0.393/(s+2.516))
réponse impulsionnelle=H(t)=2+0.393*expo(-0.34t)-0.393*expo(-2.51t)