📄 求助：matlab中fft分析后相位如何确定？？ - 信号处理方法 - 振动论坛 动力学,噪声 - powered by discuz!.mht
字号:
From: <由 Windows Internet Explorer 7 保存>
Subject: =?gb2312?B?x/PW+qO6TUFUTEFC1tBGRlS31s72uvPP4M67yOe6zsi3tqijv6O/IC0g0MU=?=
=?gb2312?B?usW0psDtt723qCAtINXxtq/C28yzILavwabRpyzU68n5IC0gUG93ZQ==?=
=?gb2312?B?cmVkIGJ5IERpc2N1eiE=?=
Date: Thu, 9 Oct 2008 22:16:16 +0800
MIME-Version: 1.0
Content-Type: multipart/related;
type="text/html";
boundary="----=_NextPart_000_0000_01C92A5C.A5BDD890"
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198
This is a multi-part message in MIME format.
------=_NextPart_000_0000_01C92A5C.A5BDD890
Content-Type: text/html;
charset="gb2312"
Content-Transfer-Encoding: quoted-printable
Content-Location: http://www.chinavib.com/forum/thread-18619-1-10.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" =
"http://www.w3c.org/TR/1999/REC-html401-19991224/loose.dtd">
<HTML =
xmlns=3D"http://www.w3.org/1999/xhtml"><HEAD><TITLE>=C7=F3=D6=FA=A3=BAMAT=
LAB=D6=D0FFT=B7=D6=CE=F6=BA=F3=CF=E0=CE=BB=C8=E7=BA=CE=C8=B7=B6=A8=A3=BF=A3=
=BF - =D0=C5=BA=C5=B4=A6=C0=ED=B7=BD=B7=A8 - =D5=F1=B6=AF=C2=DB=CC=B3 =
=B6=AF=C1=A6=D1=A7,=D4=EB=C9=F9 - Powered by Discuz!</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; charset=3Dgbk">
<META=20
content=3DFFT,=CF=E0=CE=BB,ang,cos,=C1=A6=D1=A7,=B7=C7=CF=DF=D0=D4,=CA=FD=
=D1=A7,=BF=C9=BF=BF=D0=D4,=D3=C5=BB=AF,=BF=D8=D6=C6,=F1=EE=BA=CF,=B9=CA=D5=
=CF,=D4=EB=C9=F9,=C1=F7=CC=E5=C1=A6=D1=A7,=B4=AB=C8=C8,=D0=C5=BA=C5=B4=A6=
=C0=ED,=BD=A1=BF=B5=BC=E0=BF=D8,=C9=F9=D1=A7,=CB=E3=B7=A8,=B1=E0=B3=CC,=B9=
=A4=B3=CC,=C8=ED=BC=FE,vibration,Fluent,math,CFD,matlab,CAE,CAD,ansys,msc=
=20
name=3Dkeywords>
<META=20
content=3D" =D5=F1=B6=AF=C2=DB=CC=B3 =
=D3=C3MATLAB=B6=D4=BC=F2=B5=A5=B5=C4=D5=FD=A1=A2=D3=E0=CF=D2=BA=
=AF=CA=FD=B5=C4=B7=D6=CE=F6=D6=D0=A3=AC=C8=E7x=3Dcos(2*pi*t+pi/3)=A3=AC=B3=
=CC=D0=F2=C8=E7=CF=C2=A3=BAt=3D0:0.01:20.47;x=3Dcos(2*pi*t+pi/3);xf=3Dfft=
(x);[am,index]=3Dmax(xf);ang=3Dangle(xf);p ... - Discuz! Board"=20
name=3Ddescription>
<META content=3D"MSHTML 6.00.5730.13" name=3DGENERATOR>
<META content=3D"Discuz! Team and Comsenz UI Team" name=3Dauthor>
<META content=3D"2001-2008 Comsenz Inc." name=3Dcopyright>
<META content=3DTrue name=3DMSSmartTagsPreventParsing>
<META http-equiv=3DMSThemeCompatible content=3DYes><LINK =
title=3D=D5=F1=B6=AF=C2=DB=CC=B3=20
href=3D"http://www.chinavib.com/forum/archiver/" rel=3Darchives><LINK=20
href=3D"http://www.chinavib.com/forum/forumdata/cache/style_13_viewthread=
.css"=20
type=3Dtext/css rel=3Dstylesheet><LINK=20
href=3D"http://www.chinavib.com/forum/forumdata/cache/style_13_common.css=
"=20
type=3Dtext/css rel=3Dstylesheet>
<SCRIPT type=3Dtext/javascript>=0A=
var discuz_uid =3D 0;var IMGDIR =3D 'images/wld61';var attackevasive =
=3D '0';var gid =3D 0;var STYLEID =3D '13';=0A=
gid =3D parseInt('58');var fid =3D parseInt('47');var tid =3D =
parseInt('18619');=0A=
</SCRIPT>
<SCRIPT =
src=3D"http://www.chinavib.com/forum/include/javascript/common.js"=20
type=3Dtext/javascript></SCRIPT>
<STYLE type=3Dtext/css>.style5 {
BACKGROUND-IMAGE: url(images/wld61/foot.jpg); BORDER-COLLAPSE: collapse
}
.style6 {
BORDER-COLLAPSE: collapse
}
.style7 {
BACKGROUND-IMAGE: url(images/wld61/wld1.png); TEXT-ALIGN: left
}
.style8 {
BACKGROUND-IMAGE: url(images/wld61/wld3.png); TEXT-ALIGN: center
}
.style9 {
BACKGROUND-IMAGE: url(images/wld61/wld2.png); TEXT-ALIGN: right
}
</STYLE>
</HEAD>
<BODY onkeydown=3D"if(event.keyCode=3D=3D27) return false;">
<DIV>
<TABLE class=3Dstyle6 style=3D"WIDTH: 100%" cellSpacing=3D0 =
cellPadding=3D0>
<TBODY>
<TR>
<TD class=3Dstyle7 style=3D"WIDTH: 260px; HEIGHT: 113px">
<DIV=20
style=3D"LEFT: 22px; WIDTH: 48px; POSITION: absolute; TOP: 44px; =
HEIGHT: 48px">
<H2><A title=3D=D5=F1=B6=AF=C2=DB=CC=B3 =
href=3D"http://www.chinavib.com/forum/index.php"><IMG=20
height=3D48 =
src=3D"http://www.chinavib.com/forum/images/wld61/noavatar.gif"=20
width=3D48></A></H2></DIV></TD>
<TD class=3Dstyle8 style=3D"HEIGHT: 113px"> </TD>
<TD class=3Dstyle9 style=3D"WIDTH: 500px; HEIGHT: 113px" =
vAlign=3Dtop>
<DIV id=3Dheader>
<DIV =
id=3Dad_headerbanner></DIV></DIV></TD></TR></TBODY></TABLE></DIV>
<DIV id=3Dappend_parent></DIV>
<DIV id=3Dajaxwaitid></DIV>
<DIV class=3Dwrap>
<DIV id=3Dmenu><SPAN class=3Davataonline><A=20
href=3D"http://www.chinavib.com/forum/vibregister.php">=D7=A2=B2=E1</A> =
<A=20
href=3D"http://www.chinavib.com/forum/logging.php?action=3Dlogin">=B5=C7=C2=
=BC</A>=20
</SPAN><SPAN class=3Dframeswitch>
<SCRIPT type=3Dtext/javascript>=0A=
if(top =3D=3D self) {=0A=
document.write('<a href=3D"frame.php?frameon=3Dyes" =
target=3D"_top" class=3D"frameon">=B7=D6=C0=B8=C4=A3=CA=BD<\/a>');=0A=
} else {=0A=
document.write('<a href=3D"frame.php?frameon=3Dno" target=3D"_top" =
class=3D"frameoff">=C6=BD=B0=E5=C4=A3=CA=BD<\/a>');=0A=
}=0A=
</SCRIPT>
</SPAN>
<UL>
<LI><A =
href=3D"http://www.chinavib.com/forum/member.php?action=3Dlist">=BB=E1=D4=
=B1</A>=20
</LI>
<LI><A =
href=3D"http://www.chinavib.com/forum/search.php?srchfid=3D47">=CB=D1=CB=F7=
</A> </LI>
<LI><A href=3D"http://www.chinavib.com/forum/tag.php">=B1=EA=C7=A9</A> =
</LI>
<LI class=3Ddropmenu id=3Dplugin onmouseover=3DshowMenu(this.id)><A=20
=
href=3D"http://www.chinavib.com/forum/thread-18619-1-10.html#">=C9=E8=CA=A9=
</A> </LI>
<LI><A href=3D"http://www.chinavib.com/forum/faq.php">=B0=EF=D6=FA</A> =
</LI></UL></DIV>
<STYLE type=3Dtext/css>.defaultpost {
MIN-HEIGHT: 120px! important; HEIGHT: auto! important
}
.signatures {
MAX-HEIGHT: 60px; ; HEIGHT: expression(signature(this))
}
</STYLE>
<SCRIPT =
src=3D"http://www.chinavib.com/forum/include/javascript/viewthread.js"=20
type=3Dtext/javascript></SCRIPT>
<SCRIPT type=3Dtext/javascript>zoomstatus =3D parseInt(1);</SCRIPT>
<DIV id=3Dforuminfo>
<DIV id=3Dnav>
<DIV class=3Duserinfolist>
<P><A class=3Ddropmenu id=3Dforumlist onmouseover=3DshowMenu(this.id)=20
href=3D"http://www.chinavib.com/forum/index.php">=D5=F1=B6=AF=C2=DB=CC=B3=
</A> » <A=20
href=3D"http://www.chinavib.com/forum/forum-47-10.html">=D0=C5=BA=C5=B4=A6=
=C0=ED=B7=BD=B7=A8</A> »=20
=C7=F3=D6=FA=A3=BAMATLAB=D6=D0FFT=B7=D6=CE=F6=BA=F3=CF=E0=CE=BB=C8=E7=BA=CE=
=C8=B7=B6=A8=A3=BF=A3=BF</P></DIV></DIV>
<DIV id=3Dheadsearch>
<FORM onsubmit=3D"this.target=3D'_blank';" =
action=3Dsearch.php?srchtype=3Dqihoo=20
method=3Dpost><INPUT type=3Dhidden value=3Dyes name=3Dsearchsubmit> =
<INPUT class=3Dinput=20
onmouseover=3D"this.focus();this.value=3D'';this.onmouseover=3Dnull;"=20
style=3D"BACKGROUND: #e8eff3" onfocus=3Dthis.select() size=3D27 =
name=3Dsrchtxt>=20
<BUTTON type=3Dsubmit>=CB=D1=CB=F7</BUTTON> </FORM></DIV></DIV>
<DIV id=3Dad_text></DIV>
<DIV class=3Dpages_btns>
<DIV class=3Dthreadflow><A=20
href=3D"http://www.chinavib.com/forum/redirect.php?fid=3D47&tid=3D186=
19&goto=3Dnextoldset">‹‹=20
=C9=CF=D2=BB=D6=F7=CC=E2</A> | <A=20
href=3D"http://www.chinavib.com/forum/redirect.php?fid=3D47&tid=3D186=
19&goto=3Dnextnewset">=CF=C2=D2=BB=D6=F7=CC=E2=20
››</A></DIV><SPAN class=3Dpostbtn id=3Dnewspecial=20
onmouseover=3D"$('newspecial').id =3D 'newspecialtmp';this.id =3D =
'newspecial';showMenu(this.id)"><A=20
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10"><IMG=20
title=3D=B7=A2=D0=C2=BB=B0=CC=E2 alt=3D=B7=A2=D0=C2=BB=B0=CC=E2=20
src=3D"http://www.chinavib.com/forum/images/wld61/newtopic.gif"=20
border=3D0></A></SPAN> <SPAN class=3Dreplybtn><A=20
href=3D"http://www.chinavib.com/forum/post.php?action=3Dreply&fid=3D4=
7&tid=3D18619&extra=3Dpage%3D10"><IMG=20
alt=3D"" src=3D"http://www.chinavib.com/forum/images/wld61/reply.gif"=20
border=3D0></A></SPAN></DIV>
<UL class=3D"popupmenu_popup newspecialmenu" id=3Dnewspecial_menu=20
style=3D"DISPLAY: none">
<LI><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10">=B7=A2=D0=C2=BB=B0=CC=E2</A>=20
</LI>
<LI class=3Dpoll><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10&special=3D1">=B7=A2=B2=BC=CD=B6=C6=B1</A>=
=20
</LI>
<LI class=3Dtrade><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10&special=3D2">=B7=A2=B2=BC=C9=CC=C6=B7</A>=
=20
</LI>
<LI class=3Dreward><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10&special=3D3">=B7=A2=B2=BC=D0=FC=C9=CD</A>=
=20
</LI>
<LI class=3Dactivity><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10&special=3D4">=B7=A2=B2=BC=BB=EE=B6=AF</A>=
=20
</LI>
<LI class=3Ddebate><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10&special=3D5">=B7=A2=B2=BC=B1=E7=C2=DB</A>=
=20
</LI>
<LI class=3Dvideo><A=20
=
href=3D"http://www.chinavib.com/forum/post.php?action=3Dnewthread&fid=
=3D47&extra=3Dpage%3D10&special=3D6">=B7=A2=B2=BC=CA=D3=C6=B5</A>=
=20
</LI></UL>
<FORM name=3Dmodactions method=3Dpost><INPUT type=3Dhidden =
value=3D2ec8df07=20
name=3Dformhash>=20
<DIV class=3D"mainbox viewthread"><SPAN class=3Dheadactions><A =
class=3Dnotabs=20
href=3D"http://www.chinavib.com/forum/viewthread.php?action=3Dprintable&a=
mp;tid=3D18619"=20
target=3D_blank>=B4=F2=D3=A1</A> </SPAN>
<H1><A=20
href=3D"http://www.chinavib.com/forum/forumdisplay.php?fid=3D47&filte=
r=3Dtype&typeid=3D186">[FFT]</A>=20
=C7=F3=D6=FA=A3=BAMATLAB=D6=D0FFT=B7=D6=CE=F6=BA=F3=CF=E0=CE=BB=C8=E7=BA=CE=
=C8=B7=B6=A8=A3=BF=A3=BF </H1>
<TABLE id=3Dpid99943 cellSpacing=3D0 cellPadding=3D0 summary=3Dpid99943>
<TBODY>
<TR>
<TD class=3Dpostauthor><CITE><A class=3Ddropmenu id=3Duserinfo99943=20
onmouseover=3DshowMenu(this.id)=20
href=3D"http://www.chinavib.com/forum/space-uid-33339.html"=20
target=3D_blank>fluntwind</A></CITE>=20
<DIV class=3Davatar><IMG=20
=
onerror=3D"this.onerror=3Dnull;this.src=3D'http://www.chinavib.com/UCente=
r/images/noavatar_middle.gif'"=20
src=3D""></DIV>
<P><EM><FONT =
color=3D#666699>=D3=A6=C3=C5=CA=E9=CD=AF</FONT></EM></P>
<P><IMG alt=3D"Rank: 1"=20
=
src=3D"http://www.chinavib.com/forum/images/wld61/star_level1.gif"></P>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -