Research progress of EMB systems key technology

The electro-mechanical brake (EMB) is a true brake-by-wire system that completely eliminates hydraulic/pneumatic components, enabling decoupling between driver and vehicle, achieving higher response speed, and providing more precise braking force control. As an ideal braking actuator for high-level autonomous driving technology, EMB has not yet to be widely mass-produced due to challenges related to system reliability, functional safety, and cost.This paper analyzes the current technological development and typical system structures of EMB, comparing the two major technological approaches: linear self-amplifying and nonlinear force-amplifying methods. It introduces the electronic wedge brake (EWB) , as well as hybrid EMB systems, and discusses their applicability in autonomous driving environments. Second, this study focuses on the redundancy design solutions for system architecture, electronic control units (ECU), communication architecture, and failure modes. Additionally, it explores clamping force control technology based on a sensorless clamping force estimation method. Finally, the paper analyzes the challenges faced by EMB for future industrial applications and presents prospects for further research.