How can I transform s domain to z domain at Matlab ?

I have one equations.Transfer function s/(s+0.9425).And I want transform z domain. Can you help me ? Thank you.

Answer 1

[Nikhil Negi]

Hello Berk,

you can use 'c2d' function in matlab to convert a continous transfer function into a discrete transfer function. eg Hc=h=tf([1,0],[1, 0.9425])

Hc=h=tf([1,0],[1, 0.9425])
Hd=c2d(Hc,Ts)

here Ts is the sampling time.

https://www.mathworks.com/help/control/ref/c2d.html

[BERK GÖKMEN]

Thank you very much.

[Oncel AKIN]

There is a mistake. İ have tried to convert matlab, the result was 1/z-1 function that is 1/s but when i see transform table, 1/s transforms z/z-1. Where did i have misatake in this code.

[Donghyun Lee]

right, my result was same as @Oncel AKIN's. I guess that there is a mistake too.

i really want to get clear answer about this question as soon as possible!

[Paul]

c2d() offers a variety of methods to convert from continuous to discrete. One of those methods will match your expected result.

doc c2d

Answer 2

[Anthony Adekoya]

How can I write a program in Matlab which determines the characteristics of the analogue filter which include the following:

• The step response of the RC low pass filter

• The impulse response of the RC low pass filter

• The frequency response of the RC low pass filter

[Walter Roberson]

This is a completely different question unrelated to the original, and should be asked by itself.

Answer 3

[Frantz Bouchereau]

You can use the bilinear function or the impinvar function to convert a continuous-time transfer function to a discrete-time equivalent.