Research On Control Strategy For Electro-mechanical Braking System

Electric vehicles combine the characteristics of good power, low emissions, and highefficiency. As an important mode of the operation of electric vehicles, regenerative brakingenables vehicle braking better performance and implements braking energy recoveryefficiency. It reduces vehicle fuel consumption and wear of the friction brake greatly. It hasa direct impact on vehicle’s fuel economy, driving safety performance, and reducingemissions.In this paper, the control strategy for a combined braking system is developed. Thevehicle longitudinal dynamics analysis of the one type of heavy vehicle is studied. As aresult, the vehicle braking performance evaluation index is proposed, and the requirementsof heavy-duty vehicles to braking systems are clear. The components of the heavy-dutyvehicles combined braking system are analyzed, for example, mechanical brake, retarder,motor brake. Works on their structures, characteristics, mathematical model are done.According to the initial velocity and the brake deceleration, braking conditions areclassified and analyzed by each brake demand of different conditions. This paper describesthe general structure of the braking system. The control system is divided into three parts ofacquisition, control and execution which describes the role of each part, the relationshipbetween the characteristics and the control strategy. Firstly, developed the controlobjectives and control strategy design constraints, the designed a joint braking systemhierarchy control strategy and the brake distribution strategies. Build the model inMATLAB/Simulink environment. The brake force distribution strategy for the brakingsystem mode is to meet the needs of the driver demand of the vehicle braking performance,better emergency braking performance and the life of mechanical braking device isextended.