sys = zpk()
sys = zpk('s')
sys = zpk(z, p, k)
sys = zpk(z, p, k, Ts)
sys = zpk(sysIn)
| Parameter | Description |
|---|---|
| z | zeros: a vector (or cell array of vectors). |
| p | poles: a vector (or cell array of vectors). |
| k | scalar gain. |
| Ts | Sampling time Ts, default: in seconds |
| sysIn | LTI model. |
| Parameter | Description |
|---|---|
| sys | Output zero-pole-gain system model. |
sys = zpk(z, p, k) creates a continuous-time zero-pole-gain model.
The model represents the transfer function k * (s - z(1))...(s - z(end)) / ((s - p(1))...(s - p(end))) where z are the zeros, p the poles and k the scalar gain.
When you include the Ts parameter, it allows you to create a discrete-time zero-pole-gain model.
sys = zpk(sysIn) converts the LTI model sysIn (tf or ss) into a zero-pole-gain model.
Complex zeros and poles of a real system must come in conjugate pairs. The model is displayed in factored form.
z = -1;
p = [-2 -3];
k = 5;
sys = zpk(z, p, k)sys = zpk(-1, [-2 -3], 5);
G = tf(sys)| Version | Description |
|---|---|
| 1.0.0 | initial version |