The electronic wedge brake is one of the brake-by-wire systems with a self-energizing effect. It is attractive because it can produce enough braking torque with the 12-voltage system. However, the electronic wedge brake (EWB) cannot be implemented unless the self-energizing effect is effectively controlled. The model of the EWB is developed including the PMSM (permanent magnet synchronous motor), the worm gear/wheel, the power screw/nut, the caliper, and the wedge. The developed model is simplified by considering the operating conditions of the EWB in order to design the proper control algorithms. The EWB model is validated with a 3-D MBD simulation tool and the experimental set-up. Two types of the control structure, one using the estimated clamping force and the other the measured clamping force, are investigated for the clamping force control. The sliding mode control algorithm is applied for the EWB with the contact point detection algorithm. The simple PI cascade control and the proposed algorithms are compared in simulations. The performance of the proposed clamping force controller is also verified experimentally using the HILS test bench. In order to implement the EWB in automotive industry, power consumption and reliability issues remain as future study.
Modeling and control of an electronic wedge brake
Modellierung und Regelung einer elektronischen Keilbremse
2012
16 Seiten, 18 Bilder, 1 Tabelle, 19 Quellen
Article (Journal)
English
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