清空筛选条件
清空筛选条件

getlinio command returns empty array

13 次查看（过去 30 天）
vvy
vvy 2018-10-3
回答： Valentina Bugueño Olivos 2024-2-29
I am trying to find the analysis points for existing simulink model 'rct_CSTR_OL'. However the following command returns an empty array
>> sys = 'rct_CSTR_OL'
sys =
rct_CSTR_OL
>> open_system(sys)
>> getlinio(sys)
ans =
[]
However the gain scheduling example uses the analysis point with the following command
% Linearize process dynamics at trim conditions
G = linearize('rct_CSTR_OL', 'rct_CSTR_OL/CSTR', op);
where op is the operating point created with operspec command.
I do not understand the effect of using the subsystem name 'rct_CSTR_OL/CSTR' in the above command because all examples of linearize command use linio to create analysis point.
When I try to replace the second argument in linearize with the following code
io(1)= linio('rct_CSTR_OL/CSTR',3, 'input');
io(2)= linio('rct_CSTR_OL/CSTR', 1, 'output');
io(3)= linio('rct_CSTR_OL/CSTR', 2, 'output');
G = linearize('rct_CSTR_OL', io, op)
it throws the following error
For linear analysis, the specified I/Os must map to a valid set of ports of a Simulink block. Port 3 on the "rct_CSTR_OL/CSTR" block
is no longer valid.
My questions:
1. What analysis points are being used in the first code fragment
2. How can I create a linio object to achieve the same effect as done by the first fragment
Kindly let me know. Thanks.

请先登录，再回答此问题。

回答（1 个）

Valentina Bugueño Olivos
Is it is a Simulink block you must identify the lines as inputs or outputs.
You can do it by clicking right in the line --> click linear analysis points ---> select the type of signal (input perturbation/output measurement)
Now when you use getlinio it won't give yoy an empty array
:)

类别

在 Help Center 和 File Exchange 中查找有关 Linearization Basics 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by