simulink model of wind turbine lqg regulation does not work properly

I have simulated the following block diagram with consists of a wind turbine state space with kalman filter, full state feedback and full state observer suggested by an article which I uploaded.

I don't know why I don't get the same output as the article! This is my simulink simulation:

This is my output:

This is the output in the article:

Also I'm not sure about where should I put the wind speed? I would really appreciate if you could help. I have attached my simulink file and the article.

Answer 1

[Sam Chak]

Hi @Helia Bisadi

I suspect that the instability is caused by the signs in these two summation blocks:

If you look into the closed-loop system, the feedbacks are of minus signs.

I guess you tried to follow the LQG block diagram in Fig. 1, but sometimes, some publications contained errors and the production crew were unable to fix the technical-related matters. Moreover, the paper has only one author.

[Helia Bisadi]

I have tried changing the sign of the feed back and kalman gains but I don't get any rational answer in this case too.

the output y:

and the states: