Solving ODEs inside a Subsystem in SIMULINK

Question

Bruno 2015-8-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/236772-solving-odes-inside-a-subsystem-in-simulink

回答： Bruno Calfa 2015-8-27

Hello,

I'm trying to figure out how to solve a system of ODEs inside a subsystem in a Simulink model. Basically, each call to this subsystem, which happens at each tick of the simulation clock (fixed-step), entails solving the ODEs. So there's like a different "clock" for the subsystem.

I have an M-file that implements the function for the system of ODEs. Currently, I have a MATLAB Function block for that. It needs a lot of parameters that I can get from the base workspace (via evalin and using coder.extrinsic('evalin') at the beginning). But I'm not allowed to define function_handle objects or inner functions to parameterize the function that is used by ode*. I think that if I'm able to solve the ODEs in this block, I'll have solved my problem. But those restrictions are "ruining" it.

I'd appreciate if you have any ideas of how to accomplish this. I welcome different approaches.

Thank you.

Bruno