Function Reference

dss

Specify descriptor state-space models

Syntax

• sys = dss(a,b,c,d,e)
  sys = dss(a,b,c,d,e,Ts)
  sys = dss(a,b,c,d,e,ltisys)
  
  sys = dss(a,b,c,d,e,'Property1',Value1,...,'PropertyN',ValueN)
  sys = dss(a,b,c,d,e,Ts,'Property1',Value1,...,'PropertyN',ValueN)
  

Description

sys = dss(a,b,c,d,e) creates the continuous-time descriptor state-space model

The matrix must be nonsingular. The output sys is an SS model storing the model data (see "LTI Objects" on page 2-3). Note that ss produces the same type of object. If the matrix , do can simply set d to the scalar 0 (zero).

sys = dss(a,b,c,d,e,Ts) creates the discrete-time descriptor model

with sample time Ts (in seconds).

sys = dss(a,b,c,d,e,ltisys) creates a descriptor model with generic LTI properties inherited from the LTI model ltisys (including the sample time). See "LTI Properties" on page 2-26 for an overview of generic LTI properties.

Any of the previous syntaxes can be followed by property name/property value pairs

• 'Property',Value
  

Each pair specifies a particular LTI property of the model, for example, the input names or some notes on the model history. See set and the example below for details.

Example

The command

• sys = dss(1,2,3,4,5,'td',0.1,'inputname','voltage',...
                                     'notes','Just an example')
  

creates the model

with a 0.1 second input delay. The input is labeled 'voltage', and a note is attached to tell you that this is just an example.

See Also
dssdata     Retrieve matrices of descriptor model

get         Get properties of LTI models

set         Set properties of LTI models

ss          Specify (regular) state-space models

dsort

dssdata