Understanding Dampening Force

[talha19 (Steelixion)]

My raycast suspension works perfectly on 50-60fps. However any lower it starts showing weird behavior. I am quite aware of the reason. To fix this i found this formula on another post.

Before i was using the formula without the second derivative part. However, the addition of that part fixed my problem, i cant seem to understand why it fixed it. Can anyone guide on why does this formula work? One more thing that i am using impulses rather than vector force.

link to that post:

Car Suspension (Scripted)

Having connected the wheels with the chassis, your equation for the spring becomes, [image] This could be extended further but it’ll be enough for our dampened spring. local d = suspension_length local a = 1.8 --Stiffness, higher means higher height at suspension local b = 0.6 --Rigidity higher means the suspensions will get less effected by slight changes and will balance out unlike Roblox's suspensions. This is the part that dampens the suspension. local ST = {dx=0,d2x=0} --For storing th…

[Fraiixen (Zoroark)]

I am not sure I understand what the issue is, but do you happen to be using deltaTime?

[talha19 (Steelixion)]

oh yes, i use delta time, infact, the change is divided by delta. I do know the cause of issue too. I actually wanna know the reason behind why the issue decreases by the subtraction of that second derivative part.