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Numerical computation using Matlab

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Muhammad Bilal
Muhammad Bilal 2020-7-23
关闭： MATLAB Answer Bot 2021-8-20
Hi,
I am trying to solve the expression for theta with T as an input:
Input: T
Output: theta
How can i solve to find the solution for a range of T?
Ls = 0.090;
r1 = 0.035;
Ks = 445e3;
xp = 0.1403;
func = Ks .*((sqrt((r1^2 + xp^2) - (2.*r1.*xp.*cos(theta))))...
- Ls).*r1.*(xp./(sqrt((r1^2 + xp^2) - (2.*r1.*xp.*cos(theta))))).*sin(theta) - T;

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回答（1 个）

Alan Stevens
Alan Stevens 2020-7-23
Here's a (not very elegant!) way:
Ls = 0.090;
r1 = 0.035;
Ks = 445e3;
xp = 0.1403;
theta0 = 0;
TT = 0:50:500;
Theta = zeros(size(TT));
for i = 1:length(TT)
T = TT(i);
func = @(theta) Ks.*((sqrt((r1^2 + xp^2) - (2.*r1.*xp.*cos(theta))))...
- Ls).*r1.*(xp./(sqrt((r1^2 + xp^2) - (2.*r1.*xp.*cos(theta))))).*sin(theta) - T;
Theta(i) = fzero(func, theta0);
end
plot(TT,Theta*180/pi),grid
xlabel('T'), ylabel('\theta [degrees]')

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