Vehicle systems and related calibration methods

Abstract

Vehicles and related systems and methods are provided for dynamic and adaptive coefficient estimation. One method involves detecting a steady state condition and dynamically determining an axle torque reference value and an associated a vehicle speed reference value based on measurement data during the steady state condition. After the steady state condition, the method determines an updated axle torque reference value using the axle torque reference value and a stored axle torque reference value, determines an updated vehicle speed reference value using the vehicle speed reference value and a stored vehicle speed reference value, determines estimated values for one or more nominal axle torque coefficients based at least on a relationship between the updated axle torque reference value and the updated vehicle speed reference value, and determines a torque command for operating the vehicle using the estimated nominal axle torque coefficient values.