https://www.mathworks.com/help/fusion/ref/constvel.html
constvel - State transition function for constant-velocity motion model - MATLAB
This MATLAB function returns the predicted state, predictedState, obtained from the current state, state, based on the constant-velocity motion model.
state transition functionconstantvelocitymotionmodel
https://www.mathworks.com/help/driving/ref/constacc.html
constacc - State transition function for constant-acceleration motion model - MATLAB
This MATLAB function returns the predicted state, predictedState, obtained from the current state, state, based on the constant-acceleration motion model.
state transition functionconstant accelerationmotionmodelmatlab