| Function Reference | |
Compute low frequency (DC) gain of LTI system
Syntax
Description
k = dcgain(sys)
k of the LTI model sys.
Continuous Time
The continuous-time DC gain is the transfer function value at the frequency 
. For state-space models with matrices 
, this value is
Discrete Time
The discrete-time DC gain is the transfer function value at 
. For state-space models with matrices 
, this value is
Remark
The DC gain is infinite for systems with integrators.
Example
To compute the DC gain of the MIMO transfer function
H = [1 tf([1 -1],[1 1 3]) ; tf(1,[1 1]) tf([1 2],[1 -3])] dcgain(H) ans = 1.0000 -0.3333 1.0000 -0.6667
See Also
evalfr Evaluates frequency response at single frequency
norm LTI system norms
| | dare | delay2z | |