技术问答matlab涓璮ilter鍑芥暟鎬庝箞浣跨敤 - 扬州沐宇科技

鍦∕ATLAB涓紝filter鍑芥暟鐢ㄤ簬瀵逛俊鍙疯繘琛屾暟瀛楁护娉€傚畠閲囩敤涓や釜鍙傛暟锛屼竴涓槸婊ゆ尝鍣ㄧ殑绯绘暟鍚戦噺锛屽彟涓€涓槸寰呮护娉㈢殑淇″彿銆?/p>

璇硶濡備笅锛?/p>

y = filter(b, a, x)

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渚嬪锛屽涓€涓寮︽尝淇″彿杩涜涓€涓?0闃朵綆閫氭护娉㈠櫒婊ゆ尝锛屽彲浠ヤ娇鐢ㄤ互涓嬩唬鐮侊細

fs = 1000; % 閲囨牱棰戠巼
t = 0:1/fs:1; % 鏃堕棿搴忓垪
f = 50; % 姝ｅ鸡娉㈤鐜?/span>
x = sin(2*pi*f*t); % 姝ｅ鸡娉俊鍙?/span>
% 浣庨€氭护娉㈠櫒绯绘暟
fc = 100; % 鎴棰戠巼
[b, a] = butter(10, fc/(fs/2));
% 浣跨敤filter鍑芥暟婊ゆ尝
y = filter(b, a, x);
% 缁樺埗缁撴灉
figure;
subplot(2, 1, 1);
plot(t, x);
title('鍘熷淇″彿');
subplot(2, 1, 2);
plot(t, y);
title('婊ゆ尝鍚庝俊鍙?#x27;);

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璇锋敞鎰忥紝婊ゆ尝鍣ㄧ郴鏁癰鍜宎鐨勯暱搴﹀簲涓虹浉鍚屼笖闈為浂銆?/p>