voltage sag signal genaration

hi

i am new to matlab and i want to generate voltage sag signal through m-file by using following equation,

v(t)=(1-A(u(t-t1)-u(t-t2)))sin(ωt);

where 0.1 ≤ A ≤ 0.9 is the depth of voltage sag, u(t) is unit step function, t1 and t2 is the moment of sag starting and ending, T ≤ t2-t1 ≤ 6T (T is the periodic), and ω is fundamental angle frequency.

And i just tried by following command but i did not get. it shows error.

u = inline('t >= 0');

t = [0:0.1:50]; %waveform generation

A=0.7; t1=12; t2=24;

v=(1-A*(u(t-t1)-u(t-t2)))*sin(2*pi*50*t);

plot(v);

so, please help me.

thank u in advance.

Answer 1

[Walter Roberson]

v=(1-A*(u(t-t1)-u(t-t2)))*sin(2*pi*50*t);

should be

v=(1-A*(u(t-t1)-u(t-t2))).*sin(2*pi*50*t);

[saravanan]

thank u sir.

[Appy18]

I tried the above piece of code but there happens to be no difference between my original sine wave and the sagged one. They both look the same