Optimization gain PSO and update the gain to simulink

Hello everyone !

I am trying to optimize the gains of an LQR controller with the PSO method. The cost function used for the PSO method corresponds to the result given by the simulink model. I am indeed calculating the root mean square error of the outputs and I am trying to reduce this error. In fact, I realize that the controller gains do not change. I scanned this forum for the answer but I can't find anything. If you have an idea or a method, I am interested.Thank you for your help.