series function

Series Connection of two systems

series connects two systems in the series block form below

u --->[System1]--->[System2]----> y

series(sys1, sys2, outputs, inputs)

Arguments

• sys1: LTI system object of tf, ss or zpk class
• sys2: LTI system object of tf, ss or zpk class
• outputs: vector of outputs
• inputs: vector of inputs

Returns

The function returns a state-space model of the aggregate system with A, B, C, D matrices

Details

seriessys <- series(sys1, sys2) connects the two state-space systems in series such that the outputs of sys1 specified are connected to the inputs of sys2 specified by input2. If sys1 and sys2 are both transfer functions, series(systf1, systf2) produces the SISO system in transfer function form obtained by connecting the two SISO transfer function systems in series. If a system is not in state-space representation, the function tries to form a state-space representation for such system.

Examples

series(tf(1, c(1,2,3)), tf(2, c(2,3,5)))
sys2 = ss(1,2,3,4)
sys3 = ss(6,7,8,9)
series(sys2, sys3)
series(tf(1, c(1,2,3)), ss(1,2,3,4))

See Also

parallel feedback connect