Laplace Transform Table: Impulses, Echelon Functions, and Sinusoids, Essays (university) of Automatic Controls

A table of laplace transforms for various functions, including impulse functions, echelon functions, and sinusoids. Each entry includes the laplace transform f(p) and the corresponding time domain function f(t) for t > 0. The table covers impulse functions with unit amplitude and duration t0, impulses with intensity i = at0, impulse functions retarded by τ, echelon functions with amplitude e, and sinusoidal functions with frequency ω.

Typology: Essays (university)

2020/2021

Uploaded on 01/21/2021

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Transformation de Laplace Table.doc 1
TABLE DE TRANSFORMEES DE LAPLACE
F(p) f(t) t > 0
1
Impulsion unitaire
δ(t)
de durée
t
0
et d’amplitude
1/t
0
I
Impulsion
δ(t)
de durée
t
0
0
, d’amplitude
A
et
d’intensité
I = A.t
0
e
-τp
Impulsion unitaire retardée
δ(t-τ)
1
p
Echelon unitaire
u(t)
E
p
Echelon d’amplitude
E.u(t)
1
pe
p−τ.
Echelon unitaire retardé
u(t-
τ
)
( )
11
pe
p
−τ.
Impulsion rectangulaire
u(t) - u(t-τ)
1
p a+
e
- at
.u(t)
1
1+ τp
eu t
t/
( )
τ
τ
1
2
p
Rampe unité
: t.u(t)
1
p
n
n entier positif
t
n
1
1(n )!
u(t)
1
p a.(p )+
1
e
a
at
u(t)
1
1p p.( )+ τ
(
)
1
e u t
t/
. ( )
τ
(
)
1
2
p a+
t.e
-at
.u(t)
( )
1
1
2
+ τp
te u t
t
τ
τ
2/
. ( )
( )
1
p a
n
+
1
1
1
(n )! .
∈ℵ
t e
n at
.u(t) n
*
( )
1
1+ τp
n
( )
1
1
1
τ
τ
nn t
nt e
∈ℵ
!.
/
.u(t) n
*
pf3

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TABLE DE TRANSFORMEES DE LAPLACE

F(p) f(t) t > 0

(^1) Impulsion unitaire δ(t) de durée t 0 et d’amplitude 1/t 0

I (^) Impulsion δ(t) de durée t 0 → 0 , d’amplitude A et d’intensité I = A.t 0

e-τp^ Impulsion unitaire retardée δ(t-τ)

p

Echelon unitaire u(t)

E

p

Echelon d’amplitude E.u(t)

p e^

−τ.p Echelon unitaire retardé^ u(t-τ)

p 1 −^ e^ −τ.p^

Impulsion rectangulaire u(t) - u(t-τ)

p +a

e- at.u(t)

1 + τp

e −^ t/^ τu t ( ) τ 1 p^2

Rampe unité : t.u(t)

pn^ n entier positif^

tn− −

1 (n 1 )! u(t) 1 p.(p +a)

1 − e− a

at u(t)

1 p.( 1 + τp)

( 1 − e −t/^ τ). ( )u t

p +a^2

t.e-at.u(t)

1 1 + τp^2

t τ^2 e^ −^ t/^ τ. ( )u t

1 p +a n

1 (n − )!. ∈ℵ t n−^ e−at^ .u(t) n *

1

1 + τp n^ (^ )

1 τ

τ n

n t n

t e −

. /^ .u(t) n *

F(p) f(t) t > 0 1 p 2 .( 1 + τp)

(t-τ+τ.e-t/τ).u(t)

1

p. 1 + τp 2

 1 − ( 1 +t ) e −t/ . ( )u t τ

τ

1

p 2. 1 + τp^2

( t^ −^2 τ^ +^ (t^ +^2 τ^ )e^ −t/τ). ( )u t

ω p^2 +ω^2

sin(ωt).u(t)

p p^2 + ω^2

cos(ωt).u(t)

ω p + a^2 + ω^2

e-at.sin(ωt).u(t)

p a p a

  • 2 + ω^2

e-at.cos(ωt).u(t)

p a p

(^2) + ω 2 a (^2 2) t u t 2

  • ω + ω

sin(ω ϕ ). ( ) ϕ = arctan ω a 1 p p.( 2 + ω^2 )

2

− cos ω ( ) ω

t u t

(p + a).(p +b)

b a

e at^ ebt −

− (^) − − (^) .u(t)

1 ( 1 + τ 1 p ).( 1 +τ 2 p)

1 2

1 2 τ τ

τ τ −

e −^ t^ /^ −e−t/^ .u(t)

1

p.( 1 + τ 1 p ).( 1 +τ 2 p) (^ )

1 2

− (^) τ − τ τ 1. e −^ t^ /^ τ^1 −τ 2 .e−t^ /τ^2 .u(t)

1

p^2 ( 1 + τ 1 p ).( 1 +τ 2 p) (^ )

t − + + e t^ et −

( τ τ ). −^ /^ −. −/ τ τ 1 2 τ^ τ^ τ τ 1 2

12 22

(^1 1 2) .u(t)

p^2 + 2 m ω 0 p+ω 02

m < 1 1 0 1 2 ω

e −m^ ω^ tsin(ω t ). ( )u t ω = ω 0 −m

1 p^2 + 2 m ω 0 p+ω 02

m > 1 e^ e r r

r 2 t r 1 t

2 1

u(t) r1,2 : racines de l'équation caractéristique

1 p.( p 2 + 2 m ω 0 p+ω 02 )

m < 1 (^1 ) 02

(^0 ) ω

ω ω

 − e −mω t (^) sin(ω t+ϕ) u(t) ϕ = arccos(m)

p.( p 2 + 2 m ω 0 p+ω 02 )

m > 1 (^1 ) 02

02 2 1 2 1

2 1 ω

ω − −

r r

e r

e r

r t r t u(t) 1 p 2 (p 2 + 2 m ω 0 p+ω 02 )

m < 1 1 1 2 1 02 0

0 ω ω ω

− + ω ω +ϕ

m (^) e −m t (^) sin( t ) u(t)