The Structure Design and Optimization of Electromagnetic-Mechanical Wedge Brake System

Abstract

The electromagnetic-mechanical wedge brake system (EMWB) is a new structure designed for brake-by-wire system. This structure is composed of a DC motor, an electromagnet device, two wedges, two friction plates, a rotating rod and a brake disk. The presented EMWB system contains two brake actuators such as electromagnetic brake and motor brake. The EMWB system provides a mechanical backup brake model driven by the DC motor when the electromagnetic brake fails. In the braking relief phase, the maximum torque of the DC motor should meet the requirement of separating the friction plates from the brake disk, so the brake performance of EMWB system is simulated with Matlab/Simulink and optimized under the multi-objective constraints, and the simulation results demonstrate that the mechanical backup brake model can meet the brake requirements both for the front axle and the rear axle. Through the multi-objective optimization, the EMWB system can reach an acceptable brake performance and the DC motor can meet the requirement of relieving braking.

Keywords

• Electric vehicles
• brake-by-wire system
• multi-objective optimization
• mechanical backup brake
• braking performance