필터 지우기
필터 지우기

Analysing PWM duty cycle of a signal

조회 수: 5 (최근 30일)
Sherzaad Dinah
Sherzaad Dinah 2023년 3월 20일
편집: Sherzaad Dinah 2023년 3월 24일
I have recorded a PWM signal from a given device.
I require to determine the duty cycle(s) of the signal as the transitions from one state to another.
How may I output the duty cycle of the PWM thoughout the signal?
I am using Matlab 2016b

답변 (1개)

David Hill
David Hill 2023년 3월 20일
s=pwm>threshold;%pwm is your signal, threshold is when it is considered on or off
d=diff(s);
idx1=find(s,1);
idx2=find(d==-1);
idx3=find(d==1);
num=idx2-[idx1-1,idx3(1:end-1)];
denom=diff([idx1-1,idx3]);
dutyCycle=num./denom;
  댓글 수: 3
David Hill
David Hill 2023년 3월 21일
편집: David Hill 2023년 3월 21일
I assumed your data was a horizontal array. For a better response, attach your data.
s=CH01_01(:)';%convert to horizontal array
s=s>.75;
Sherzaad Dinah
Sherzaad Dinah 2023년 3월 22일
편집: Sherzaad Dinah 2023년 3월 24일
Thank you for your help,
After making the change, I no longer have any error.
However all the calculated duty cycles are greater than 1?!
Is there something else that needs to be done with the data please?
I have attached the data as requested. Kindly please advise.
s = CH01_01(:)';
s=s>0.75;%pwm is your signal, threshold is when it is considered on or off
d=diff(s);
idx1=find(s,1);
idx2=find(d==-1);
idx3=find(d==1);
num=idx2-[idx1-1,idx3(1:end-1)];
denom=diff([idx1-1,idx3]);
dutyCycle=num./denom

댓글을 달려면 로그인하십시오.

카테고리

Help CenterFile Exchange에서 MATLAB에 대해 자세히 알아보기

태그

제품


릴리스

R2016b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by