Simulink matrix multiplication error when passing matrix to model

1 次查看（过去 30 天）
Dieter
Dieter 2024-6-4
回答： Harald 2024-6-7
Hi,
I am trying to create a simulink model that does a few matrix multiplications but I cant seem to get the inputs right.
This is the setup of the model. Wind and gravity are 3x1 vectors and DCM is a 3x3 matrix coming from the 6DOF fixed mass model.
The model itself looks like this:
Given the dimensions the expected multiplications should result in (3x3) * (3x1) = (3x1).
However, when running the simulation i get several dimension mismatch errors:
Error using uavsim (line 7)
Error due to multiple causes.
Caused by:
Error using uavsim (line 7)
Error in port widths or dimensions. 'Output Port 1' of 'storm_uav/Constant2' is a [3x1] matrix.
Error using uavsim (line 7)
Error in port widths or dimensions. 'Input Port 1' of 'storm_uav/Model5' is a one dimensional vector with 1 elements.
I don't know why this is happening as the dimensions are correct in my opinion. Is there a mistake in the way I pass the vectors and the matrix to the model?
Help is greatly appreciated.
Thanks

请先登录，再回答此问题。

回答（1 个）

Harald
Harald 2024-6-7
Hi,
if DCM is 3x3, I'd expect the signal dimensions to indicate that. However, it shows 9, so I'd think that this is really a vector with 9 elements.
If that is the case, you can use a Reshape block to convert it to a 3x3 matrix. Depending on the ordering of elements in the vector, you may need to use a Transpose block on top of it.
Best wishes,
Harald

类别

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

标签

产品


版本

R2024a

Community Treasure Hunt

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

Start Hunting!

Translated by