Turn function to zero when it reach specific value.

Question

Abdul Kadir Alhamid 2019-12-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/497691-turn-function-to-zero-when-it-reach-specific-value

评论： Abdul Kadir Alhamid 2019-12-22

Hello everyone, I am trying to apply sinusoidal force to my structure with a given function, and I want to stop the force whenever it reach the variable "Pu". I try to write this code but it seems doesn't working.Can anyone help me to solve this out?

x = linspace (0,180,1800);
y = 1. * ((exp (-0.01. * x)). * (sin (x)-(x. * cos (x / 2))));
Pu = 30;
for i = 1: length (x)
if x (i)> x (abs (y)> = 30)
y (i) = 0;
end
end
subplot (1,1,1);
axis ([0 180 -50 50]);
grid on
xlabel ( 'Time (min)' )
ylabel ( 'Force (kN)' )
ani1 = animatedline ( 'Color' , 'r' , 'LineStyle' , '-' );
legend ( 'Force Applied' )
for k = 1: length (x)
    addpoints (ani1, x (k), y (k));
    drawnow
    pause (0.01);
end

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Answer 1

Vladimir Sovkov 2019-12-22

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/497691-turn-function-to-zero-when-it-reach-specific-value#answer_407360

在 MATLAB Online 中打开

x = linspace (0,180,1800);
y = 1. * ((exp (-0.01 .* x)) .* (sin (x)-(x .* cos (x / 2))));
Pu = 30;
y(find(y>=Pu,1):end)=0;
% for i = 1: length (x)
% if x (i) > x (abs (y) >= 30)
% y (i) = 0;
% end
% end
figure;
subplot (1,1,1);
axis ([0 180 -50 50]);
grid on
xlabel ( 'Time (min)' )
ylabel ( 'Force (kN)' )
ani1 = animatedline ( 'Color' , 'r' , 'LineStyle' , '-' );
legend ( 'Force Applied' )
for k = 1: length (x)
    addpoints (ani1, x (k), y (k));
    drawnow
    pause (0.01);
end