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ruyangt

Í­³æ (СÓÐÃûÆø)

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2Â¥2015-12-28 09:57:34
ÒÑÔÄ   ÉêÇë³ÌÐòÇ¿Ìû   »Ø¸´´ËÂ¥   ±à¼­   ²é¿´ÎÒµÄÖ÷Ò³

getengqing

ľ³æ (ÕýʽдÊÖ)

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¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
È»²¢Ã»ÓÐʲô³ÌÐò
Ò»Æð½»Á÷ѧϰ/·ÖÏíÓÅÐã×ÊÔ´
3Â¥2015-12-28 10:22:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ruyangt

Í­³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by Tsin1138 at 2015-12-28 09:57:34
ÄãµÄ³ÌÐòÄØ£¿£¿£¿

ÎÒÉÏ´«¹ýÁ˰¡
4Â¥2016-01-02 19:08:13
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

newbee

гæ (ÕýʽдÊÖ)

5Â¥2016-01-02 19:24:35
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ruyangt

Í­³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
5Â¥: Originally posted by newbee at 2016-01-02 19:24:35
ûÓп´¼û

%%
clear;
r0=5e-3;
% r0=1e-3;
% miu=8;
% sigma_e=1/(60e-8);
f=100;T=1/f;
H0=40;
w=2*pi*f;
H=@(t)40*sin(2*pi*f*t);
miu_0=4*pi*1e-7;
d=10e-3;
pho=60e-8;
S=78.5e-6;
beta=16;
V_0=1e3;
G=0.1356;
k_e=3.283;
alpha=-0.02;
c=0.18;
Ms=770;
a=7.012;
%% Å·À­·¨ÇóÊýÖµ½â
I_max=200;
dt=T/I_max;t0=0;
%% ÆðµãÖµ;
M=0;
c1=miu_0*d.^2/(2*pho*beta);
c2=sqrt(miu_0*G*S*V_0/(2*pho*beta));
t=t0;
% H=@(x,y)H0*exp(j*w*t+sqrt(j*miu*sigma_e*w).*(sqrt(x.^2+y.^2)-r1)).*r1./sqrt(x.^2+y.^2);
% ymax=@(x)sqrt(r1^2-x.^2);
% ymin=@(x)sqrt(r0^2-x.^2);
% HH=quad2d(H,0,r0,ymin,ymax)+quad2d(H,r0,r1,0,ymax);
% HH=real(HH)*4/(pi*(r1^2-r0^2));
HH=0;
for i=1:I_max;
    t=t0+i*dt;
%     H=@(x,y)H0*exp(j*w*t+sqrt(j*miu*sigma_e*w).*(sqrt(x.^2+y.^2)-r1)).*r1./sqrt(x.^2+y.^2);
%     Ht=quad2d(H,0,r0,ymin,ymax)+quad2d(H,r0,r1,0,ymax);
%     Ht=real(Ht)*4/(pi*(r1^2-r0^2));
    Ht=H(t);
    dH=Ht-HH(i);
    %% mean_H=quad2d "»ý·Ö"
    if Ht<0
        delta=-1;
    else delta=1;
    end
    HH(i+1)=Ht;
    M(i+1)=erfen(c1,dH,dt,c2,k_e,delta,M(i),alpha,Ht);
    B(i+1)=miu_0*(M(i+1)+HH(i+1));
end
plot(HH,B,'ro')
xlabel('´Å³¡Ç¿¶È')
ylabel('´Å¸ÐӦǿ¶È')




function M_1=erfen(c1,dH,dt,c2,k_e,delta,M,alpha,H)
fun=@(x)odeff(x,c1,dH,dt,c2,k_e,delta,M,alpha,H);
left=-1000;
right=1000;
n=1000;dh=(right-left)/n;
for i=1:n;
    x_l=left+(i-1)*dh;
    x_r=left+i*dh;
    if fun(x_l)*fun(x_r)>0; continue;end
    if fun(x_l)==0;M_1=x_l;break;end;
    if fun(x_r)==0;M_1=x_r;break;end;
    d=1;
    while d>1e-5;
        x=(x_l+x_r)/2;
        if fun(x_l)*fun(x)==0;
            M_1=x;break;
        elseif fun(x_l)*fun(x)<0;
            x_r=x;
        else x_l=x;
        end
        d=abs(x_l-x_r);
    end
    M_1=(x_l+x_r)/2;
end
end
function ff=odeff(M_1,c1,dH,dt,c2,k_e,delta,M,alpha,H)
c=0.18;
Ms=770;
a=7.012;
dM=M_1-M;
He=H+alpha*(M+dM);
He_0=H-dH+alpha*M;
dHe=He-He_0;
M_an=Ms*(coth(He/a)-a/He);
dM_an=M_an-Ms*(coth(He_0/a)-a/He_0);
ff=c1*dH/dt*(dM/dH).^2+c2*sqrt(dH/dt)*(dM/dH).^1.5+...
    (k_e*delta-alpha*(M_an-M_1+k_e*delta*c*dM_an/dHe))*dM/dH-...
    (M_an-M_1+k_e*delta*c*dM_an/dHe);
end
6Â¥2016-01-02 19:33:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ruyangt

Í­³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
3Â¥: Originally posted by getengqing at 2015-12-28 10:22:49
È»²¢Ã»ÓÐʲô³ÌÐò

%%
clear;
r0=5e-3;
% r0=1e-3;
% miu=8;
% sigma_e=1/(60e-8);
f=100;T=1/f;
H0=40;
w=2*pi*f;
H=@(t)40*sin(2*pi*f*t);
miu_0=4*pi*1e-7;
d=10e-3;
pho=60e-8;
S=78.5e-6;
beta=16;
V_0=1e3;
G=0.1356;
k_e=3.283;
alpha=-0.02;
c=0.18;
Ms=770;
a=7.012;
%% Å·À­·¨ÇóÊýÖµ½â
I_max=200;
dt=T/I_max;t0=0;
%% ÆðµãÖµ;
M=0;
c1=miu_0*d.^2/(2*pho*beta);
c2=sqrt(miu_0*G*S*V_0/(2*pho*beta));
t=t0;
% H=@(x,y)H0*exp(j*w*t+sqrt(j*miu*sigma_e*w).*(sqrt(x.^2+y.^2)-r1)).*r1./sqrt(x.^2+y.^2);
% ymax=@(x)sqrt(r1^2-x.^2);
% ymin=@(x)sqrt(r0^2-x.^2);
% HH=quad2d(H,0,r0,ymin,ymax)+quad2d(H,r0,r1,0,ymax);
% HH=real(HH)*4/(pi*(r1^2-r0^2));
HH=0;
for i=1:I_max;
    t=t0+i*dt;
%     H=@(x,y)H0*exp(j*w*t+sqrt(j*miu*sigma_e*w).*(sqrt(x.^2+y.^2)-r1)).*r1./sqrt(x.^2+y.^2);
%     Ht=quad2d(H,0,r0,ymin,ymax)+quad2d(H,r0,r1,0,ymax);
%     Ht=real(Ht)*4/(pi*(r1^2-r0^2));
    Ht=H(t);
    dH=Ht-HH(i);
    %% mean_H=quad2d "»ý·Ö"
    if Ht<0
        delta=-1;
    else delta=1;
    end
    HH(i+1)=Ht;
    M(i+1)=erfen(c1,dH,dt,c2,k_e,delta,M(i),alpha,Ht);
    B(i+1)=miu_0*(M(i+1)+HH(i+1));
end
plot(HH,B,'ro')
xlabel('´Å³¡Ç¿¶È')
ylabel('´Å¸ÐӦǿ¶È')



function M_1=erfen(c1,dH,dt,c2,k_e,delta,M,alpha,H)
fun=@(x)odeff(x,c1,dH,dt,c2,k_e,delta,M,alpha,H);
left=-1000;
right=1000;
n=1000;dh=(right-left)/n;
for i=1:n;
    x_l=left+(i-1)*dh;
    x_r=left+i*dh;
    if fun(x_l)*fun(x_r)>0; continue;end
    if fun(x_l)==0;M_1=x_l;break;end;
    if fun(x_r)==0;M_1=x_r;break;end;
    d=1;
    while d>1e-5;
        x=(x_l+x_r)/2;
        if fun(x_l)*fun(x)==0;
            M_1=x;break;
        elseif fun(x_l)*fun(x)<0;
            x_r=x;
        else x_l=x;
        end
        d=abs(x_l-x_r);
    end
    M_1=(x_l+x_r)/2;
end
end
function ff=odeff(M_1,c1,dH,dt,c2,k_e,delta,M,alpha,H)
c=0.18;
Ms=770;
a=7.012;
dM=M_1-M;
He=H+alpha*(M+dM);
He_0=H-dH+alpha*M;
dHe=He-He_0;
M_an=Ms*(coth(He/a)-a/He);
dM_an=M_an-Ms*(coth(He_0/a)-a/He_0);
ff=c1*dH/dt*(dM/dH).^2+c2*sqrt(dH/dt)*(dM/dH).^1.5+...
    (k_e*delta-alpha*(M_an-M_1+k_e*delta*c*dM_an/dHe))*dM/dH-...
    (M_an-M_1+k_e*delta*c*dM_an/dHe);
end
7Â¥2016-01-02 19:33:52
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
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