If else if loop

Question

Nimish Iwale 2020-6-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/549144-if-else-if-loop

评论： Nimish Iwale 2020-6-16

Hello all, I am trying to make a MATLAB function block in Simulink where in I need a specific spring force (Spring rate x Displacement) for a specific displacement signal. Following is the Simulink figure and the corresponding code in the block.

function Spring_Force = fcn(displacement)
if (0 <= displacement <= 15) % Stroke
    Spring_Force = 10*displacement;
   elseif (16 <= displacement <= 100) % Stroke
    Spring_Force = 18*displacement;
    else
    Spring_Force = 14*displacement;
end

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The problem: The output is always the first statement i.e. - Spring_Force = 10*displacement; even if the displacement signal varies above 15 as specified. It does not consider the elseif and else statements at all. There is no error shown. If I re-write the first statement as Spring_Force = 0*displacement, the output is 0 for that input signal. Can anyone please help on this?

Thank you very much.

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Answer 1

madhan ravi 2020-6-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/549144-if-else-if-loop#answer_451941

在 MATLAB Online 中打开

function Spring_Force = fcn(displacement)
Spring_Force =  (0 <= displacement <= 15) .* 10*displacement + ...
                (16 <= displacement <= 100) + 18*displacement + ...
                (displacement > 100) + 1 * displacement;
end