Trouble Coding Kinematics Problem

2 ビュー (過去 30 日間)
Bailey Smith
Bailey Smith 2018 年 10 月 9 日
回答済み: Sebastian Castro 2018 年 10 月 9 日
I am trying to code this problem into MATLAB. I want to solve for theta3, theta4, w3, and w4 (w being omega). I am having some trouble getting my thetas to work. When I try to solve, say, for theta2=95 degrees, I keep getting 0 and 1 degree, respectively. Is my problem just setting up the code incorrectly, or is it something else?
Thank you in advance!
clear; clc;
theta2=input('Enter a Value For Theta 2 in Degrees: ');
w1=0; %ground; can't move
theta1=0; %ground; no angle
syms theta3 theta4
%R2+R3=R1+R4 -> OA+AB=OC+BC -> OA+AB-OC-BC=0
sol1=solve([eq1,eq2], [theta3 theta4]);
% syms w3 w4
% %time derivative equations = velocity equations
% eq3=-(OA*sin(theta2)*(w2))-(AB*sin(theta3)*w3)+(BC*sin(theta4)*w4)==0;
% eq4=(OA*cos(theta2)*(w2))+(AB*cos(theta3)*w3)-(BC*cos(theta4)*w4)==0;
fprintf('Theta 3 is %.f degrees\n',theta3_(1))
fprintf('Theta 4 is %.f degrees\n',theta4_(1))
% fprintf('The angular velocity of omega 3 is %.f rad/s\n',w3)
% fprintf('The angular velocity of omega 4 is %.f rad/s\n',w4)


Sebastian Castro
Sebastian Castro 2018 年 10 月 9 日
You probably want to convert from degrees to radians, since the sin and cos functions accept radians.
That, or you can use sind and cosd instead.
- Sebastian

その他の回答 (0 件)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by