problem with ssc_build to generate custom simscape library

Question

轩贾 2023-4-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1954394-problem-with-ssc_build-to-generate-custom-simscape-library

评论： Yifeng Tang 2024-8-26

Hi everyone, I am trying to learn how to make custom simscape blocks.I have written ssc file,and created a new directory (named +gear_

pump) that I added to my Matlab path.Then, I run the ssc_build command to generate my custom library. When run the ssc_build command I get the following error message:

Generating Simulink library 'gear_pump_lib' in the MATLAB package parent directory 'D:\matlab\simscape\' ...

Failed to generate 'gear_pump_lib'

原因:

错误使用 feval

函数或变量 'gear_pump.gear_pump' 无法识别。

(translate in English :

reason:

Incorrect use of festival

Function or variable 'gear'_ pump.gear_ The 'pump' is not recognized)

9 个评论
显示 7更早的评论隐藏 7更早的评论

Yifeng Tang 2023-5-5

在 +dirname 的上一级目录执行 ssc_build('dirname')

轩贾 2023-5-6

>> ssc_build

Generating Simulink library 'custom_library_lib' in the MATLAB package parent directory 'F:\matlab\' ...

Failed to generate 'custom_library_lib'

原因:

错误使用 custom_library/gearpump>

No matching signature found for function floor.

Argument 1 = {[1x1 double], 'rad'}

phi = {[1x1 double], 'rad'}

z = 14

真的很麻烦您了。我是这个之后，输入ssc_build，出现了问题，无法generate 'custom_library_lib'。

其实非常想加您的联系方式，具体聊一聊。

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Yifeng Tang 2023-5-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1954394-problem-with-ssc_build-to-generate-custom-simscape-library#answer_1229589

The input to the ssc_build command should be the directory name, instead of the .ssc file name. The directory can contain multiple .ssc files and they'll all be compiled into a custom library. The directory has to be named to start with a "+", but don't include that "+" in the input to ssc_build.

For example, in the screenshot I shared earlier in the comments, you can see I put the .ssc file in the +custom_library folder, then used ssc_build('custom_library') command to compile. Please give it a try and see if that works for you as well. Here is the documentation page explaining the details: https://www.mathworks.com/help/simscape/ref/ssc_build.html See the first example.

Also, in your gear_pump.ssc file, you may need to delete a few /{1,'rad'} in some equations for it to run correctly. Seems like Simscape treats rad as unitless and complains about unit mismatch.

2 个评论
显示无隐藏无

Yifeng Tang 2023-5-5

gear_pump_custom.zip

Attached are the files and library I was able to compile, and a simple test model.

Once your custom model is working, I'd like to encourage you to consider NOT using the Hydraulic domain and instead using the newer Isothermal Liquid domain. The difference and the advantages of the IL domain can be found on the following documentation pages:

https://www.mathworks.com/help/simscape/upgrading-hydraulic-models-to-use-isothermal-liquid-blocks.html

https://www.mathworks.com/help/simscape/ug/advantages-of-using-isothermal-liquid-blocks.html

Happy modeling.

轩贾 2023-5-5

Error compiling Simscape network for model untitled.

原因:

['untitled/Hydraulic Gear Pump']: No matching signature found for function floor. 在 gearpump.gear_pump (line 45) 中
Argument 1 = {[1x1 double], '1/rad'}
phi = [1x1 double]
z = 14

确实出现了这个问题，那么 rad弧度单位该怎么替换呢？

请先登录，再进行评论。

Answer 2

ms z 2024-8-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1954394-problem-with-ssc_build-to-generate-custom-simscape-library#answer_1505154

你好，我遇到了同样的问题，也是在使用ssc_build的时候报错函数或变量无法识别，请问您是怎么解决的，能否指点一下，谢谢

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Yifeng Tang 2024-8-26

If you used a MATLAB function in your equations session of the .ssc code, the function has to be one on this list: https://www.mathworks.com/help/simscape/lang/equations.html#brtts6o

If you don't think that's the issue, consider ask in a new question and provide more details.

请先登录，再进行评论。