csim(1)

NAME
csim - simulation (time response) of linear system

CALLING SEQUENCE
[y [,x]]=csim(u,t,sl,[x0])

PARAMETERS

u   : function, list or string (control)

t   : real vector specifying times with, t(1) is the initial time (x0=x(t(1))).

sl  : list (syslin)

y   : a matrix such that y=[y(t(i)], i=1,..,n

x   : a matrix such that x=[x(t(i)], i=1,..,n

DESCRIPTION
simulation of the controlled linear system sl. sl is assumed to be a continuous-time system represented by a syslin list.

u is the control and x0 the initial state.

y is the output and x the state.

The control can be:

1. a function : [inputs]=u(t)

2. a list : list(ut,parameter1,....,parametern) such that: inputs=ut(t,parameter1,....,parametern) (ut is a function)

3. the string "impuls" for impulse response calculation (here sl is assumed SISO without direct feed through and x0=0)

4. the string "step" for step response calculation (here sl is assumed SISO without direct feed-through and x0=0)

EXAMPLE
s=poly(0,'s');rand('seed',0);w=ssrand(1,1,3);w(2)=w(2)-2*eye;
t=0:0.05:5;
//impulse(w) = step (s * w)
xbasc(0);xset("window",0);xselect();
plot2d([t',t'],[(csim('step',t,tf2ss(s)*w))',0*t'])
xbasc(1);xset("window",1);xselect();
plot2d([t',t'],[(csim('impulse',t,w))',0*t'])
//step(w) = impulse (s^-1 * w)
xbasc(3);xset("window",3);xselect();
plot2d([t',t'],[(csim('step',t,w))',0*t'])
xbasc(4);xset("window",4);xselect();
plot2d([t',t'],[(csim('impulse',t,tf2ss(1/s)*w))',0*t'])

SEE ALSO
syslin, dsimul, flts, ltitr, rtitr, ode, impl