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[ÇóÖú] ´óÉñ°ïÎÒ¿´¿´matlab½â³ÝÂÖÄöºÏ·½³ÌµÄ³ÌÐò£¬mΪ0.5422

fun=@(fi)sin(theta+fi)+m*cos(theta+fi)-m;
    fi=0:pi/20:pi;
    it=0;
    for i=2:1:21;
        s=fun(fi(i));
        d=fun(fi(i-1));
        if s*d<0
            it=i;
        end
    end
    if(it==0)%×¢ÒâÕâ¸öÅж¨ÖÐ==ºÅÓë=µÄÇø·Ö
       fi1=0;
    end
    if(it>0)
    a=fi(it-1);
    b=fi(it);
    clc
    clear fi ;%Õâ¸öÇå³ýµÄ±äÁ¿Ðè¸ú¿ªÊ¼¶¨ÒåµÄ±äÁ¿Ò»ÖÂ
    fun=@(fi)sin(theta+fi)+m*cos(theta+fi)-m;
    [x_star]=bisect(fun,a,b);%Õâ¸öÊǶþ·Ö·¨Çó½â
    fi1=x_star;
    end

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