how to convert discrete data to continuous data?

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Aniket
Aniket 2013-3-15
Hello I have discrete A,B,C,D system matrices, and i want to convert them in continuous , i have written a script for this but it is giving me error . how should i do this ?
********
load ABCD_matrix.mat
sysd=ss(As,Bs,Cs,Ds);
sysc=d2c(sysd,'zoh');
[Asc,Bsc,Csc,Dsc]=ssdata(sysc);
********************
the error is
Error using DynamicSystem/d2c (line 35)
The first input argument of the "d2c" command must be a discrete-time model.
Error in LQGG (line 5)
sysc=d2c(sysd,'zoh');

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回答（1 个）

Honglei Chen
Honglei Chen 2013-3-15
You need to specify the sample time in ss, something like
ss(A,B,C,D,Ts)
  2 个评论
Azzi Abdelmalek
Azzi Abdelmalek 2013-3-15
编辑：Azzi Abdelmalek 2013-3-15
Aniket, sysd=ss(As,Bs,Cs,Ds) ; is not a discrete model, it's continuous
Aniket
Aniket 2013-3-15
ok but if the A,B,C,D matrix data is discrete then how should i convert it to continuous?

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