csim - simulation (time response) of linear system
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 )
5. a vector giving the values of u correponding to each t value.
s=poly(0,'s');rand('seed',0);w=ssrand(1,1,3);w('A')=w('A')-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'])
//input defined by a time function
deff('u=input(t)','u=abs(sin(t))')
xbasc();plot2d([t',t'],[(csim(input,t,w))',0*t'])