dcgain
Low-frequency (DC) gain of a state-space or transfer function model
Syntax
K = dcgain(SYS)
K = dcgain(NUM, DEN)
K = dcgain(A, B, C, D)
Inputs
- SYS
- Continuous-time state-space or transfer function model.
- NUM
- The numerator polynomial coefficient vector or matrix.
- DEN
- The denominator polynomial coefficient vector.
- A
- The state matrix (n x n), where n is the number of states.
- B
- The input matrix (n x p), where p is the number of inputs.
- C
- The output matrix (q x n), where q is the number of outputs.
- D
- The direct transmission matrix (q x p).
Outputs
- K
- The gain scalar or matrix.
Examples
State space model input:
[a, b, c, d] = ord2(2.4,0.4)
sys = ss(a, b, c, d)
r = dcgain(sys)r = 0.173611111Transfer function model input:
k = dcgain([1],[1 5 6 2])k = 0.5Comments
K = dcgain(SYS) calculates the DC gain K of the state-space or transfer function model.