Bode diagram of a quarter model

I'm a really newer of matlab and I'm trying to bode something looks almost same as quarter model like this

m1x''=k(y-x)+b(y'-x')+k2(y-x) m2x''=-k(y-x)-b(y'-x')

I only know how to do it with one x, but with y in it as well I have no idea how to start.

O_O

Answer 1

[Arkadiy Turevskiy]

You need to figure out what the inputs and outputs are and express the system as a transfer function or a state space system. Once you do that you can get Bode plot by simply typing

>>bode(sys)

Take a look at examples on Control System Toolbox page.