Originally Posted By: TigerJimmy
Well, as my fantastic Controls professor used to say, "friction always acts to stabilize the system, so there's no need to model it." Particularly given the magnitude of the forces involved in a car suspension, you can leave those terms out.

Well, with the Morgan that stabilizing is actually significant and of interest - some people report managing surprisingly well without any shocks/dampers at all just because there is so much friction
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My bigger question is -- exactly what are you trying to accomplish?

Basically just understand the system, and how different tweaks affect it. A good example is that a lot of people seem to shorten the springs in order to get a softer suspension - and of course accomplish exactly the opposite, except when the shortening drives the suspension in a mode where the rebound spring is fully extended and floating free.