![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/359578/image.png)
The power funciton in math function block does not correctly work.
2 次查看(过去 30 天)
显示 更早的评论
I choosed the signed power. If the power is even, the output always keeps positive. It works well if the power is not even. I wonder what happens when the power is even. Is it a bug?
The input u this example is a sine wave signal and v is 2, 3, 6, respectively. Please look the scope in the figure, when the power is even, it keeps positive. It is strange. I don't know if this exmaple works correctly on other machines.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/359548/image.png)
0 个评论
采纳的回答
Ameer Hamza
2020-9-12
There seems to be a bug in the implementation of Signed Power functionality in the case of integer powers. You may consider filing a bug report: https://www.mathworks.com/support/bugreports/report_bug. Meanwhile, you can create your own block using power and sign blocks
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/359578/image.png)
0 个评论
更多回答(1 个)
BOB MATHEW SYJI
2020-9-12
When “signed power” is checked, it first calculates the power of absolute value of input and then multiplies it with sign of the input. You can find more on: https://www.mathworks.com/help/simulink/slref/mathfunction.html
另请参阅
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!