How to model a ramp input with two slopes and saturation at zero?

Hello,

I am working on a model which I should define an input as following:

• Start time: 0
• A ramp input with slope of 0.1 up to t=10s;
• Continuing with another ramp input with slope of -0.5 after t=10s and saturation at zero.
• No negative values for amplitude and the run time=50s.

I was wodering how it is possible to model this input data using for/while loop in MATLAB!

Any assistance is highly appreciated!

Answer 1

[Les Beckham]

One approach (no loops necessary)

t=0:0.1:50;
y = zeros(size(t));
y(t<10) = 0.1 * t(t<10);
y(t>=10) = 1 - 0.5 * (t(t>=10) - 10);
y(y<0) = 0;
plot(t,y, 'linewidth', 2)
grid on