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原帖由 maton12345 于 2008-6-10 11:31 发表
我試過了好像抓不到兩曲線相交的點
還有限制橫坐標範圍是什麼意思
有點看不懂
還有難道不能在程式上修改嗎???
修改了一下代码,画出下面的图
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- clc
- clear
- close all
- kx=7.152e6;
- kt=kx;
- cx=0.0417;
- wnx=355;
- N=10;
- phist=67*(pi/180);
- phiex=139*(pi/180);
- kr=0.577;
- kc=kt*sqrt(1+kr.^2);
- axxst=(1/2)*(cos(2*phist)-2*kr*phist+kr*sin(2*phist));
- axxex=(1/2)*(cos(2*phiex)-2*kr*phiex+kr*sin(2*phiex));
- axx=abs(axxex-axxst);
- s=0;
- for wc=355:.01:550
- s=s+1;
- Gxx=(wnx^2*kx)/((wnx^2)-(wc^2)+2*j*cx*wnx*wc);
- G0x=axx*Gxx;
- HW=1/G0x;
- z=imag(HW)/real(HW);
- pha=atan(z);
- b(s)=(2*pi)/(N*axx*kt*real(Gxx));
-
- T(s)=(wc*60)/(N*((2*0+1)*pi-2*pha));
- end
- hold on
- grid on
- plot(T,abs(b)*kc*pi*100000000,'r-')
- s=0;
- for wc=355:.01:550
- s=s+1;
- Gxx=(wnx^2*kx)/((wnx^2)-(wc^2)+2*j*cx*wnx*wc);
- G0x=axx*Gxx;
- HW=1/G0x;
- z=imag(HW)/real(HW);
- pha=atan(z);
- b(s)=(2*pi)/(N*axx*kt*real(Gxx));
-
- T(s)=(wc*60)/(N*((2*1+1)*pi-2*pha));
- end
- a=find(T>173.6&T<343);
- hold on
- grid on
- plot(T(a),abs(b(a))*kc*pi*100000000,'g-')
- s=0;
- for wc=355:.01:550
- s=s+1;
- Gxx=(wnx^2*kx)/((wnx^2)-(wc^2)+2*j*cx*wnx*wc);
- G0x=axx*Gxx;
- HW=1/G0x;
- z=imag(HW)/real(HW);
- pha=atan(z);
- b(s)=(2*pi)/(N*axx*kt*real(Gxx));
-
- T(s)=(wc*60)/(N*((2*2+1)*pi-2*pha));
- end
- a=find(T>115.9&T<173.6);
- hold on
- grid on
- plot(T(a),abs(b(a))*kc*pi*100000000,'b-')
- s=0;
- for wc=355:.01:550
- s=s+1;
- Gxx=(wnx^2*kx)/((wnx^2)-(wc^2)+2*j*cx*wnx*wc);
- G0x=axx*Gxx;
- HW=1/G0x;
- z=imag(HW)/real(HW);
- pha=atan(z);
- b(s)=(2*pi)/(N*axx*kt*real(Gxx));
-
- T(s)=(wc*60)/(N*((2*3+1)*pi-2*pha));
- end
- a=find(T<=115.9);
- hold on
- grid on
- plot(T(a),abs(b(a))*kc*pi*100000000,'m-')
- axis([100,450,0,50])
- xlabel('Spindle speed (rev/min)');
- ylabel('k_ca_l_i_m [N/mm]x(113000)');
- title('stability chart(k=0~3)');
复制代码
[ 本帖最后由 ch_j1985 于 2008-6-10 21:50 编辑 ] |
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