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Signaux et Systèmes

Authored by Flo Collin

Science

University

Used 13+ times

Signaux et Systèmes
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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Quels systèmes sont linéaires et invariants dans le temps ?

x2(t)−dx(t)dt=0x^2\left(t\right)-\frac{\text{d}x\left(t\right)}{\text{d}t}=0

x(t)−tdx(t)dt=0x\left(t\right)-t\frac{\text{d}x\left(t\right)}{\text{d}t}=0

x(t)−5d2x(t)dt2=0x\left(t\right)-5\frac{\text{d}^2x\left(t\right)}{\text{d}t^2}=0

x(t)×dx(t)dt=0x\left(t\right)\times\frac{\text{d}x\left(t\right)}{\text{d}t}=0

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

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La figure représente le signal échelon Γ(t)\Gamma\left(t\right) .

Vrai

Faux

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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Le signal x(t) est en retard sur le signal y(t).

Vrai

Faux

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

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L'expression du signal x(t) est :

x(t)=Γ(t)−Γ(t−t0)x\left(t\right)=\Gamma\left(t\right)-\Gamma\left(t-t_0\right)

x(t)=A(Γ(t)−Γ(t−t0))x\left(t\right)=A\left(\Gamma\left(t\right)-\Gamma\left(t-t_0\right)\right)

x(t)=AΓ(t)×Γ(t−t0)x\left(t\right)=A\Gamma\left(t\right)\times\Gamma\left(t-t_0\right)

x(t)=A×Γ(t−t0)x\left(t\right)=A\times\Gamma\left(t-t_0\right)

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

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L'ordre du système d3y(t)dt3+y(t)+d2u(t)dt2=0\frac{\text{d}^3y\left(t\right)}{\text{d}t^3}+y\left(t\right)+\frac{\text{d}^2u\left(t\right)}{\text{d}t^2}=0 est :

Ordre 5

Ordre 2

Ordre 3

Ordre 1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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L'équation caractéristique de 5d2y(t)dt2+3dy(t)dt+y(t)=05\frac{\text{d}^2y\left(t\right)}{\text{d}t^2}+3\frac{\text{d}y\left(t\right)}{\text{d}t}+y\left(t\right)=0 est :

r2+3r+5=0r^2+3r+5=0

3r2+5r+1=03r^2+5r+1=0

3r2+r+5=03r^2+r+5=0

5r2+3r+1=05r^2+3r+1=0

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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Le signal d'entrée d'un système linéaire est u(t)=5Γ(t). En régime permanent, le signal de sortie y(t) est de la forme :

y(t)=AΓ(t)y\left(t\right)=A\Gamma\left(t\right)

y(t)=Aty\left(t\right)=At

y(t)=Be−aty\left(t\right)=Be^{-at}

y(t)=Be−at×Γ(t)y\left(t\right)=Be^{-at}\times\Gamma\left(t\right)

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