Generating Triangular wave in simulink

I have sine wave bx is simulink,is there any box for triangular wave available,else please tell how to generate triangular wave in simulink of equal amplitude and time

[Walter Roberson]

Please read the guide to tags and retag this question; see http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags

Answer 1

[Azzi Abdelmalek]

generate your signal in matlab command then use a from workspace block with variable name ty

ts=0.1;
t=-3:ts:3
y=repmat(max(t)-abs(t),1,10)
t=-3:ts:-3+length(y)*ts-ts
ty=[t' y']

[kash]

Thanks Azzi ,in that i get a amplitude of 2.5 and time is 6 can u please tell how to adjust the amplitude ans time to 2 please

[Azzi Abdelmalek]

ts=0.1;tim=2
t=-tim:ts:tim
y=repmat(max(t)-abs(t),1,10)
t=-tim:ts:-tim+length(y)*ts-ts
ty=[t' y']

[Azzi Abdelmalek]

if you want insert zeros between triangles

ts=0.1;tim=2;perc=0.5   %perc >0
t=-tim:ts:tim
y=repmat([max(t)-abs(t) zeros(1,ceil(length(t)*perc))],1,10)
t=-tim:ts:-tim+length(y)*ts-ts
plot(t,y)
ty=[t' y']

[kash]

thanks Azzi final question can we use repeating sequence block as a triangular wave

[Azzi Abdelmalek]

yes you can

[JohnLio]

Azzi Abdelmalek: i didn't get how you did that, can you please elaborate a bit how to and which block i have to use in matlab, and where to put these code, newbie in matlab :|

Answer 2

[Julien]

Hi, the triangle generator does not exist but you can create your own.

My tip is to create a pulse signal (pulse width =50%) and adding a negative offset (typically the half of the amplitude you want).

If you want a triangle signal between [0 1] then you have to set:

pulse amplitude : 4 offset : -2

Then you have a pulse varying between [-2 2] You just have to integrate this signal and you will get a nice triangle signal varying between [0 1] ;)

[kash]

Thanks Julien as i am new to simulink can u please tell how to create a pulse signal (pulse width =50%) and adding a negative offset (typically the half of the amplitude).

[kash]

Julien can u please model

[Julien]

Contact me in my personal address then I'll can send you the file

[Sara]

how can i get a triangular wave varying from -ve value to a +ve value??

Answer 3

[Julien]

My example simulink block is online

http://www.mathworks.com/matlabcentral/fileexchange/38526

[kash]

Thanks a lot julien but can u tel how u got this block plz

[Azzi Abdelmalek]

right click on the model then click 'look under mask'

[kash]

ok Azzi thanks can u tell how to generate a multicarrier Input with 5 triangular wave and a sivewave over it

[kash]

in the link

http://www.mathworks.in/company/newsletters/digest/july04/images/ln_figure8_wl.jpg

is triangle block in that image is same as a triangle block given bt Julien

[Azzi Abdelmalek]

yes

[kash]

ok Azzi i did as per it but not getting 5 triangular wave on each axes and a sine wave over it

[kash]

i have given image for 15 level ,same as it like i need for 7 level

plz help

http://imgur.com/5ldev

[Azzi Abdelmalek]

I did'nt understand. You still have problem with generating triangular wave?

[kash]

not in triangular wave i added 5 triangular and a sine wave to get the desired output as above ,but not getting the answer

[Azzi Abdelmalek]

If you have another problem, I suggest to post another question

Answer 4

[Vijay P]

Please guide me how to do in simulink.