# How to model a double transfer function in Simulink?

I'm trying to model an actuator in Simulink based transfer functions previously derived.

One of functions is $$\omega_p=G_2(K_cG_1V_c-c)$$ where $$G_1=\frac{K_e}{\tau_es+1}$$ $$G_2=\frac{1}{c+K_cK_wG_1}$$

where $$K_c,K_w,K_e,c,\tau$$ are constants. I'm not really sure what it means to have a transfer function inside another and how to model it. We tried substituting $$G_1$$ into $$G_2$$ directly but the result didn't seem right. Would really appreciate if someone could explain what it means, how to model it in Simulink or point me in the right direction.

• Please add some information regarding the transfer functions. What is $G_1, G_2, \omega_p$ ? What’s the transfer function of the actuator ? It would be best if you edit the question and add this information. Commented Nov 29, 2020 at 19:36
• if substituting $G_1$ into $G_2$ didnt gave the right result, you have either made a mistake substituting or your model description is off. Converting this to a block diagram is equal to substituting the equations into a single transfer function. Commented Nov 30, 2020 at 12:23