Mr. Zheng Xu Profile

Zheng Xu

at Tianjin University of Technology and Education

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Proceedings Article | 7 September 2022 Paper

Research on EMB control strategy considering braking gap

Zheng Xu, Guowei Gao

Proceedings Volume 12329, 123292U (2022) https://doi.org/10.1117/12.2646913

KEYWORDS: Control systems, Mathematical modeling, Actuators, Signal processing, Safety, Motion models, Iron, Automatic control, Process modeling, Process control

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The wear of the brake pad will lead to the increase of the braking gap, thus prolonging the braking time and threatening the driving safety of the driver. In this paper, the working principle of each functional component of the EMB actuator is analyzed, and the simulation model of each component is established. At the same time, a three closed loop PI controller suitable for the actuator is designed, and the control strategy considering the braking gap is added. The expected clamping force is applied at the control end to compare the changes of the three parameters of EMB, namely, clamping force, motor speed and screw displacement, with and without brake clearance control. The simulation results show that this strategy can eliminate the braking gap as soon as possible and improve the response speed of the actuator. Moreover, after the braking, the screw can quickly return to the initial position to prepare for the next braking, which effectively avoids the adverse braking conditions that may occur due to the change in the size of the braking gap.

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