Feedforward Control of Clamping Force in Electronic Mechanical Brake System Based on Inertia Identification and Load Torque Observation

The braking system is an essential element for ensuring the safe operation of vehicles. This research investigates the influence of electronic mechanical brakes on the control performance of permanent magnet synchronous motors, with a particular focus on variations in the load torque and inertial load. This study addresses challenges such as delayed responses in the clamping force and diminished control accuracy. To mitigate these issues, a Luenberger load torque observer is utilized for the real-time identification of load torque. The identified load torque is subsequently converted into a compensation current, which is integrated into the current loop as a feed-forward compensation signal to enhance the control performance. Additionally, to reduce the impact of variations in inertial load on the overall control system, this study employs a model reference adaptive algorithm for the online identification of rotational inertia, with the identification results being fed back to the load torque observer. The efficacy of this approach was validated through the development of a corresponding simulation model. Simulation outcomes indicate that the proposed strategy for identifying rotational inertia and implementing load torque feed-forward compensation significantly enhances the accuracy of clamping force control and the system's resistance to interference in electromechanical brakes, thereby offering a novel technical pathway for achieving high-precision brake control.