bode plot for a equation containing signum function ?

How can i create bode plot for

((y_dot)^2)*(sgn(y)) - u

Answer 1

[Arkadiy Turevskiy]

Bode plot only "works" for linear time-invariant systems. Yours is not. Maybe if you explain why you are trying to create a bode plot, and what you want to use it for, you can get better help.