MATLAB Project - Slotted Arm

Produce the following commands in a Matlab m-file named simulate.m, and then run

it.

% This program simulates the mechanical system defined in device.m

figure(1);

for t=0:0.002:0.4;

theta=10*pi*t;

alpha=atan(sin(theta)./(3-cos(theta)));

% find coordinates of A

Xa=20*cos(theta); Ya=20*sin(theta);

% find coordinates of C

Xc=20*cos(theta)+85*cos(alpha); Yc=20*sin(theta)-85*sin(alpha);

axis([-20 105 -40 40]);

axis(’equal’);

axis manual;                   %(*)

hold on;

plot([0 Xa],[0 Ya],’b’);

plot([Xa Xc],[Ya Yc],’r’);

plot([-20 105],[0 0],’k:’);

text(-1.5,-1.5,’O’); text(58.5,-1.5,’B’)

hold off;

pause(0.01);

clf;                           %(*)

end;