MATLAB CONTROL SYSTEM TOOLBOX 9 Dokumentacja Pobierz pdf (Strona 547)

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with sample time Ts (in seconds). Set Ts = -1 or Ts = [] to leave the sample

time unspecified.

sys = ss(d) specifies a static gain matrix and is equivalent to

sys = ss([],[],[],d)

sys = ss(a,b,c,d,ltisys) creates a state-space model with generic LTI

properties inherited from the LTI model

ltisys (including the sample time).

See “Generic Properties” on page 2-26 for an overview of generic LTI

properties.

See “Building LTI Arrays” on page 4-12 for information on how to build arrays

of state-space models.

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

pairs.

'PropertyName',PropertyValue

Each pair specifies a particular LTI property of the model, for example, the

input names or some notes on the model history. See the

set entry and the

example below for details. Note that

sys = ss(a,b,c,d,'Property1',Value1,...,'PropertyN',ValueN)

is equivalent to the sequence of commands.

sys = ss(a,b,c,d)

set(sys,'Property1',Value1,...,'PropertyN',ValueN)

Conversion to State Space

sys_ss = ss(sys) converts an arbitrary TF or ZPK model sys to state space.

The output

sys_ss is an equivalent state-space model (SS object). This

operation is known as state-space realization.

sys_ss = ss(sys,'minimal') produces a state-space realization with no

uncontrollable or unobservable states. This is equivalent to

sys_ss =

minreal(ss(sys))

Examples Example 1

The command

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