可得:(5.4)编写Matlab程序figure4.m画图,程序如下:omega=5:.01:15;o1=omega/sqrt(92.9017);o2=omega/sqrt(184.5269);k1=108400;k2=129080;xi1=0.0025;xi2=0.0062;y11=(1-o1.^2)./(k1.*((1-o1.^2).^2+(2.*xi1.*o1).^2))+(1-o2.^2)./(k2.*((1-o2.^2).^2+(2.*xi2.*o2).^2));plot(omega,y11,'LineWidth',2);axis([520-0.00350.005])gridon?xlabel('频率Hz')ylabel('幅值mm')title('m1的一阶虚频特性')输出图形:5)的导纳图:与的关系编写Matlab程序figure5.m画图,程序如下:omega=0:.01:15;o1=omega/sqrt(92.9017);o2=omega/sqrt(184.5269);k1=108400;k2=129080;xi1=0.0025;xi2=0.0062;yR=(1-o1.^2)./(k1.*((1-o1.^2).^2+(2.*xi1.*o1).^2))+(1-o2.^2)./(k2.*((1-o2.^2).^2+(2.*xi2.*o2).^2));yI=(-2.*xi1.*o1)./(k1.*((1-o1.^2).^2+(2.*xi1.*o1).^2))+(-2.*xi2.*o2)./(k2.*((1-o2.^2).^2+(2.*xi2.*o2).^2));plot(yR,yI,'LineWidth',2);axissquaregridon?xlabel('实频幅值mm')ylabel('虚频幅值mm')title('m1的一阶Nyquist图')输出图形:
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