資源簡(jiǎn)介
希望有需要的同學(xué)喜歡,多交流信號(hào)處理的知識(shí),代碼共享
代碼片段和文件信息
%~~~~~~~~~~~~~導(dǎo)入數(shù)據(jù)~~~~~~~~~~~~~%
clc
clear
Fs=71680;
N=Fs*5;
t=(0:N-1)/Fs;
Adc?=?1;?%直流分量幅度
%?S=sin(2*pi*t.^2-?pi/6)+sin(4*pi*t.^2-?pi/6)+sin(8*pi*t.^2-?pi/6)
%?S2=Adc+?sin(2*pi*?t.^2-?pi/6);%參考軸的轉(zhuǎn)速為n(t)=60t?r/min
S=sin(2*pi*t.^2)+sin(4*pi*t.^2)+sin(8*pi*t.^2);
S2=Adc+?sin(2*pi*?t.^2);
array_time_amp=S;????%導(dǎo)入時(shí)域振動(dòng)信號(hào)
pluse=S2;?????????????%導(dǎo)入脈沖信號(hào)
figure(1);
%?subplot(211)plot(tarray_time_amp)title(‘time?dominant振動(dòng)信號(hào)時(shí)域圖‘)xlabel(‘時(shí)間time‘)ylabel(‘幅值amplitude‘);
subplot(211)plot(tarray_time_amp)title(‘變轉(zhuǎn)速數(shù)據(jù)‘)xlabel(‘時(shí)間time‘)ylabel(‘幅值amplitude‘);
grid?on;
%?subplot(212)plot(tpluse)title(‘keyphasor鍵相脈沖仿真信號(hào)時(shí)域圖‘)xlabel(‘時(shí)間time‘)ylabel(‘幅值amplitude‘);
subplot(212)plot(tpluse)title(‘轉(zhuǎn)速脈沖‘)xlabel(‘時(shí)間time‘)ylabel(‘幅值amplitude‘);
grid?on;
%?%~~~~~~~~~~~~~~~計(jì)算脈沖發(fā)生時(shí)刻~~~~~~~~~~~~~~~%
%?Num_pluse1=1;
Num_pluse1=[];
Threshold=1.5;%設(shè)定脈沖閾值
for?temp2=1:length(pluse)-1;%設(shè)temp2為步長(zhǎng)為1的[12.....n-1]n-1維數(shù)組;即將所有的采樣點(diǎn)編號(hào);length函數(shù)功能是返回pluse的數(shù)組維數(shù);for循環(huán)體循環(huán)n-1次,再結(jié)束。
%?????for?temp2=1:length(pluse)-1;
????if(pluse(temp2)<1.5&&pluse(temp2+1)>=1.5)
?????????????Num_pluse1=[?Num_pluse1temp2+1];%Num_pluse1=[121967.....temp(2+1)]
????end
end
?Num_pluse1=Num_pluse1(1:length(Num_pluse1));
if?length(Num_pluse1)<2returnend;%如果脈沖信號(hào)就一個(gè)數(shù)則跳出計(jì)算脈沖發(fā)生時(shí)刻的函數(shù)
?t_pluse=(Num_pluse1-1)/Fs;%
%?
%?
%?
%?
%~~~~~~~~~~~~~~~等角度時(shí)間計(jì)算~~~~~~~~~~~~~~~~%
delt_thet=pi/24;
t_angle=[];
for?temp3=3:length(t_pluse);
b=inv([1t_pluse(temp3-2)t_pluse(temp3-2)^2;1t_pluse(temp3-1)t_pluse(temp3-1)^2;1t_pluse(temp3)t_pluse(temp3)^2])*[02*pi4*pi]‘;
????if?temp3==3;%(如果數(shù)temp3等于3則執(zhí)行第一個(gè)循環(huán),如果temp3不等于3則執(zhí)行第二個(gè)循環(huán),即在脈沖時(shí)刻[tt0tt3]執(zhí)行第一個(gè)循環(huán),等角度時(shí)刻記到[t1,t72])
???????k=0;
???????????while?k<1.5*2*pi/delt_thet;%0 ??????????????????tt=(sqrt(4*b(3)*(k*delt_thet-b(1))+b(2)^2)-b(2))/(2*(b(3)+eps));
??????????????????t_angle=[t_anglett];
??????????????????k=k+1;
????????????end
????else
????????k=pi/delt_thet;%k=24(如果temp3不等于3則執(zhí)行第二個(gè)循環(huán),即在脈沖時(shí)刻[tt1tt4].......[tt13tt16]執(zhí)行第二個(gè)循環(huán),等角度時(shí)刻記到[t72,t120],[t120t168]........[t648t696]))
????????????while?k>=pi/delt_thet?&&?k<1.5*2*pi/delt_thet;%?24 ????????????????tt=(sqrt(4*b(3)*(k*delt_thet-b(1))+b(2)^2)-b(2))/(2*(b(3)+eps));
????????????????t_angle=[t_anglett];
????????????????k=k+1;
????????????end
????end
end
a
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