open loop response for nonlinear system

Question

ojonugwa adukwu 2019-8-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476125-open-loop-response-for-nonlinear-system

评论： ojonugwa adukwu 2019-8-15

Good day everyone. How do I simulate nonlinear system in open loop in matlab? I have this nonlinear system and I want to observe the response before applying controller. How do I do that? Please help with the code. Thanks.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jon 2019-8-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476125-open-loop-response-for-nonlinear-system#answer_387582

Basically you need to define the set of ODE's (ordinary differential equations) that define your system and then solve them. MATLAB has many routines for solving ODE's, Please see the documentation at https://www.mathworks.com/help/matlab/ordinary-differential-equations.html?s_tid=CRUX_lftnav

After you have attempted to code up a solution, if you are still having problems, please attach your code and explain the specific problems you are encountering.

2 个评论
显示无隐藏无

ojonugwa adukwu 2019-8-14

Oh Great! Let me try that now. I will get back when I have made headway.

Many thanks

Jon 2019-8-14

编辑：Jon 2019-8-14

It is little bit tricky to apply your input vector to the system of equations. One approach is explained in https://www.mathworks.com/help/matlab/ref/ode45.html in the example ODE with Time-Dependent Terms

I assume you do not have Simulink. In Simulink you can do everything with block diagrams and it is very straight forward to drive your blocks with a known input vector.

请先登录，再进行评论。