I need to get the result for a unit step input at 0 s and a unit negative step disturbance at 25 s. But I am not understanding how to give the input

This is my code. I am not understanding how to give the step input at t=0 and the unit negative step disturbance at 25s.

s = tf('s');

Gc = 0.96*(1.+0.34*s);

Gc.InputName = 'e';

Gc.OutputName = 'u';

Gmleft1 = 1/s;

Gmleft1.Inputname = 'u';

Gmleft1.OutputName = 'a';

Gmleft2 = exp(-s);

Gmleft2.Inputname = 'a';

Gmleft2.OutputName = 'b';

Gmright1 = 1/s;

Gmright1.Inputname = 'f';

Gmright1.OutputName = 'g';

Gmright2 = exp(-s);

Gmright2.Inputname = 'g';

Gmright2.OutputName = 'y';

Gd = 0.96*(1.+0.34*s);

Gd.InputName = 'y1';

Gd.OutputName = 'y2';

d = 0;

S1 = sumblk('r1 = r - y1');

S2 = sumblk('e = r1 - a');

S3 = sumblk('c = u - y2');

S4 = sumblk('f = d + c');

S5 = sumblk('y1 = y - b');

T = connect(Gc,Gmleft1,Gmleft2,Gmright1,Gmright2,S1,S2,S3,S4,S5,{'r'},'y');

Answer 1

[Priyanshu Mishra]

Hi Manideep

For unitstep input , you may refer the following documentation:

https://www.mathworks.com/help/signal/gs/impulse-step-and-ramp-functions.html