matlab四杆机构
我用matlab7运行了好几遍都可以但是用matlab2009b运行两次还行但是后来运行时在红色字体处出现错误了不知是怎么回事请指点程序代码:
function sgjg global L0 L1 L2 L3 th1 str=inputdlg({'请输入机架长L0:','曲柄长L1:','连杆长L2:','摇杆长L3:','w1(rad/sec):','input repeat times m:','input initial theta3(rad):'},'please input!',1,{'20','8','25','20','100','10','1'}); L0=str2num(str{1}); L1=str2num(str{2}); L2=str2num(str{3}); L3=str2num(str{4}); w1=str2num(str{5}); m =str2num(str{6}); theta3=str2num(str{7}); t=linspace(0,2*pi/w1,181); dt=2*pi/180/w1; theta1=w1*t; th1=theta1(1); theta3(1)=fzero('f',theta3); x1=0; y1=0; x2=x1+L1*cos(theta1(1)); y2=y1+L1*sin(theta1(1)); x4=x1+L0; y4=y1; x3=x4+L3*cos(theta3(1)); y3=y4+L3*sin(theta3(1)); figure('Name','四杆机构运动仿真','NumberTitle','off','position',[232 199 617 479]); line([x1;x4],[y1;y4],'Color','m','LineStyle',':','LineWidth',3,'EraseMode','none'); line(x1,y1,'Color','b','LineStyle','.','EraseMode','none','MarkerSize',40); line(x4,y4,'Color','b','LineStyle','.','EraseMode','none','MarkerSize',40); dot2=line(x2,y2,'Color','b','LineStyle','.','EraseMode','xor','MarkerSize',15); dot3=line(x3,y3,'Color','b','LineStyle','.','EraseMode','xor','MarkerSize',15); line12=line([x1;x2],[y1,y2],'color','r','linestyle',':','erasemode','xor'); line23=line([x2;x3],[y2;y3],'color','g','linestyle',':','erasemode','xor'); line34=line([x4;x3],[y4;y3],'color','b','linestyle',':','erasemode','xor'); axis([-L1-L0/3 L2+L3 -L0/3-L1 L3]); axis equal; for i=1:m for j=2:181 th1=theta1(j); theta3(j)=fzero('f',theta3(j-1)); x2=x1+L1*cos(th1); y2=y1+L1*sin(th1); x3=x4+L3*cos(theta3(j)); y3=y4+L3*sin(theta3(j)); set(dot2,'xData',x2,'yData',y2); set(dot3,'xData',x3,'yData',y3); set(line12,'xData',[x1;x2],'yData',[y1;y2]); set(line23,'xData',[x2;x3],'yData',[y2;y3]); set(line34,'xData',[x3;x4],'yData',[y3;y4]); drawnow; end end w3=diff(theta3)/dt; a3=diff(w3)/dt; function y=f(th3) global L0 L1 L2 L3 th1 y=L1*cos(th1)+L2*sqrt(1-(L3*sin(th3)-L1*sin(th1))^2/L2/L2)-L3*cos(th3)-L0;
[ 本帖最后由 灵风剑客 于 2011-6-30 11:36 编辑 ]