how to create 1-(cos(x))^2 input to simulink mass spring damper system

hi there. I am currently trying to develop a simulink model to describe a quarter car model (dual mass spring damper) with a curved bump as an input. The model i am currently using is the same as on the mathworks website;

https://uk.mathworks.com/help/physmod/simscape/examples/mass-spring-damper-in-simulink-and-simscape.html

i am using this single mass spring damper system for simplicity whilst i learn simulink.

The problem i am having is trying to input a bump that starts at zero, rises to a maximum of 0.05m and returns to zero over a 0.26m length. The curve itself is a 1-(cos(x))^2 curve, using only the first pi radians of the curve so it does not become a negative. i have looked at using the data from a .mat file but i get the error message saying

"simulink is trying to plot over 1300 points and could take some time"

This is because it is taking just the individual parts of the 1300 units long vector, rather than the curve it describes, shown in the attachment.

I am hoping to at some point develop the quarter car model, and from there, a coupled half car model, but i am trying not to run before i can walk. I know the output i am looking for as i have accelerometer data as well as an excel model which describes the quarter car model. For the quarter car model i am looking at implementing somthing similar to;

https://uk.mathworks.com/help/physmod/simscape/examples/double-mass-spring-damper-in-simulink-and-simscape.html

Any help would be greatly appreciated,

also if there are any very good sources for learning the very basics of simulink which someone could point me in the direction of i would be very grateful

many thanks

Ross

Answer 1

[Ross Hanna]

Found a solution. Instead of importing data in a two column double (Time and Height of step), i imported from the workspace using the SIMIN block. Hopefully this will help someone else