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function[s,v,a]=Zihanshu(theta1)
global LBC XD
theta3=atan(0.075*sin(theta1)./(0.075*cos(theta1)+0.15));
delta_theta1=atan(0.075*sin(theta1+2*pi*10^(-6))./(0.075*cos(theta1+2*pi*10^(-6))+0.
15));
delta_theta2=atan(75*sin(theta1+4*pi*10^(-6))./(75*cos(theta1+4*pi*10^(-6))+150));
s=sqrt((LBC)^2-(XD-0.23+0.15+0.1*cos(theta3)).^2)-0.1*sin(theta3);
s1=sqrt((LBC)^2-(XD-0.23+0.15+0.1*cos(delta_theta1)).^2)-0.1*sin(delta_theta1);
v=-((s1-s)/10^(-6));
s2=sqrt((LBC)^2-(XD-0.23+0.15+0.1*cos(delta_theta2)).^2)-0.1*sin(delta_theta2);
a=-(((s2-s1)/10^(-6)-(s1-s)/10^(-6))/10^(-6));
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global LBC XD
LBC=0.100;
XD=-0.150;
[s,v,a]=Zihanshu(4/3*pi:2*pi/36:10/3*pi);
theta1=4/3*pi:2*pi/36:10/3*pi;
subplot(1,3,1)
plot(theta1,-s,'-b');
title('Image of displacement of cutting tool');
ylabel('value of function')
grid on;
subplot(1,3,2)
plot(theta1,v,'-k');
title('Image of speed of cutting tool');
xlabel('theta');
grid on;
subplot(1,3,3)
plot(theta1,a,'-m');
title('Image of acceleration of cutting tool');
grid on;
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