What are thrust perturbations?

Thrust perturbations are small changes that happen when something moves or pushes harder or softer than usual.

Imagine you're on a swing. You push yourself forward with your legs to go higher. Now, suppose sometimes you push a little more, maybe you jump extra hard, and other times you just tap your feet gently. These small differences in how much force you use are like thrust perturbations.

Think of a car driving down the road. If it keeps going at the same speed, everything is smooth. But if the driver sometimes presses harder on the gas or lets off a little, the car speeds up or slows down slightly, these are thrust perturbations in action.

These small changes might not seem like much, but over time, they can make a big difference, just like how your swing goes higher and lower with each push. In space, spacecraft feel these kinds of changes too, helping them move to new places or adjust their path.