For a continuous-time, linear, time-invariant system with transfer function
*Y(s)/R(s) = G(s)* and a unit-step input signal, *R(s)
*= 1/*s*, the Laplace transform of the response is *Y(s)
*= *G(s)*/*s*. If the system is stable, the steady-state value
of the response will be *y(t) *= *G(0)*. This is called the *dc-gain*
of the system. To view the unit-step response *y(t)* for the transfer
function

K (s-z= ---------------------_{1})(s-z_{2})...(s-z_{m}) G(s)(s-p_{1})(s-p_{2})...(s-p_{n})

To see the unit-step response change as a pole or zero is moved, click
**Move** and drag the pole or zero. (Remember that the default gain
value changes to maintain *G(0) *= 1.)

Applet by Brian Woo. |