Hello Nachtwey,
Thank you for your sharing, it is an interesting experience, and RK method is very useful.
I used RK method calculated the results of W, and it is right result compare with Simulink.
I learned a lot of knowledge! Thank you so much. Today is very lucky! You are my Santa this...
Thanks for all response.
Yes, this friction model is Stribeck friction model, and I tried to derive W_out(t)'s differential equations, but it is too difficult to get W_out(t).
I will try to linearize Stribeck friction model, and wish it can get good result.
Hello engineers:
I have an question of derive transfer function in nonlinear control system, as title.
Generally, a linear system can easy derive transfer function like the picture, but it is difficult to derive transfer function when it include friction model.
I want to ask every excellent...