Motion simulator using simulink

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Wajih IMLIKI
Wajih IMLIKI 2022-5-20
评论： Sam Chak 2022-5-20
Hello Everyone,
I'm new to simulimk so excuse me..
So, using simulink it was needed to simulate the motion of ball with
D is drag and
So given some values of S=1, Cd=0.7 (-) and initial position and initial velocity
the model needs to plot z vs t and V vs t and the trajectory of the ball in x-z plane until the ball touches the ground (i assume z=0 so we dont need to use memory block)
I did this model but apparently its not working well (the model itself is wrong I guess)
Thank you in advance

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回答（1 个）

Sam Chak
Sam Chak 2022-5-20
编辑：Sam Chak 2022-5-20
Hi @Wajih IMLIKI
You multiply v with v, and then you take a square root of v²? In order to get the absolute value of v? By the way, what is the coordinate system of v? Is it x, y, or z? You are advised to sketch a Free Body Diagram so that you can interpret it correctly.
Perhap you rectify this issue and see if there is any error message pops up.
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Wajih IMLIKI
Wajih IMLIKI 2022-5-20
编辑：Wajih IMLIKI 2022-5-20
its 2D motion so on both x and z, and V has both x and z components
Sam Chak
Sam Chak 2022-5-20
I see. Can you provide the equations of motion separately for the x-direction and z-direction?
I'm not sure if MATLAB has a special symbolic function for resolving vectors into perpendicular components.
I think this function maybe useful:
https://www.mathworks.com/help/symbolic/norm.html

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