Techniques for estimating active electric motor damping torque for electrified vehicles

An active electric motor damping (AEMD) calibration and control method for an electrified vehicle, the AEMD calibration and control method comprising:

• executing, by an external computing system that is separate from the electrified vehicle, a virtual model to simulate operation of the electrified vehicle in a plurality of different operating modes, wherein the electrified vehicle includes an electrified powertrain comprising an electric motor configured to generate drive torque that is transferred to a driveline;
• determining, by the external computing system and using the virtual model to, a set of optimized parameters, for each of the plurality of different operating modes of the electrified vehicle, for AEMD control of the electric motor;
• and
• outputting, from the external computing system to a control system of the electrified vehicle, the sets of optimized parameters, wherein receipt of the sets of optimized parameters cause the control system to control the electric motor based on the sets of optimized parameters to perform AEMD control,
• wherein the AEMD control involves determining a measured speed of the electric motor, passing the measured speed through a low-pass filter and then through a high-pass filter to obtain a filtered speed, and applying a gain value to the filtered speed to obtain an AEMD torque that is summed with a commanded motor torque, and
• wherein the determining of the gain value is performed by approximating the virtual model as a simplified two degree-of-freedom (DOF) two inertia, spring system use the simplified two DOF two inertia, spring system to determine the gain value (PAEMD) as:
• P
• AEMD
• =
• -
• 2
• ⁢
• ω
• n
• (
• 1
• -
• ξ
• Driveline
• )
• ⁢
• J
• Tot
• ,
• where JTot is a total inertia of the electrified powertrain, the driveline, and the vehicle at a location of the electric motor, ωn is a natural frequency of the driveline, and ξDriveline is a damping ratio of the driveline.