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Simulink syntax error for inverted pendulum model

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Alex Chlabicz
Alex Chlabicz 2017-6-20
回答： Harish Saranathan 2017-7-28
Hello, I am modelling an inverted pendulum system in simulink. I am getting a syntax error in my "N" block in the "Inverted Pendulum" submodel in the simulink file attached. I have checked my equations and could not figure out what is wrong.
Any help would be appreciated. Thank you in advance.

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回答（1 个）

Harish Saranathan
Harish Saranathan 2017-7-28
Hello Alex,
The variables "l", "g" and "b" need to be defined in the workspace. Moreover, there was a syntax error (unbalanced brackets) in the function block "P". The line in it should read:
0.2*(l*(u(2))^2*cos(u(1))+l*u(3)*sin(u(1)))+g
Harish

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