A Fault Detection Method for Electric Parking Brake (EPB) Systems with Sensorless Estimation Using Current Ripples 2007-01-3660
A fault detection method with parity equations is proposed in this paper. Due to low cost implementation, the velocity of a motor is not measurable in EPB systems. Therefore, residuals are not reliable with a low resolution encoder to estimate the motor velocity. In this paper, we propose a fault detection method with sensorless estimation using current ripples. The method estimates position and velocity of the motor by detecting periodical oscillations of the armature current caused by rotor slots. This method could estimate position and velocity of the motor with less computational effort than a state observer. Moreover, the method is less sensitive to motor parameters than model-based estimation methods. The effectiveness of this method is validated with experimental data. The simulation results show that various faults have their own residual patterns. Therefore, we could detect the fault by monitoring the residual signals.
Citation: Chung, H., Son, Y., Yoon, P., Lee, C. et al., "A Fault Detection Method for Electric Parking Brake (EPB) Systems with Sensorless Estimation Using Current Ripples," SAE Technical Paper 2007-01-3660, 2007, https://doi.org/10.4271/2007-01-3660. Download Citation
Han Byul Chung, Youngsup Son, Paljoo Yoon, Choong Woo Lee, Doo Ho Lee, Young Ok Lee, Chung Choo Chung
MANDO Corporation, Hanyang University
Asia Pacific Automotive Engineering Conference