吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (4): 998-1007.doi: 10.13229/j.cnki.jdxbgxb20170507

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Optimal design of electromechanical brake actuator through an integrated mechatronic approach

XIA Li-hong1, DENG Zhao-xiang1,2   

  1. 1.School of Automotive Engineering, Chongqing University, Chongqing 400044, China;
    2.State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
  • Received:2017-04-12 Online:2018-07-01 Published:2018-07-01
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Abstract: A novel multi-objective optimal design method is proposed for gearhead and ball screw two-stage driven electromechanical Brake actuator (EMB). With consideration of important factors, such as two stage driving, discrete transmission ratio, dynamic resistant torque, transmission inertia and feasibility constraints related to the component characteristics, this method can applied to determine the optimal combination of motor, gearhead and ball screw. First, the loads and motion laws were analyzed based on the dynamic models of EMB for emergency braking and anti-lock braking on dry asphalt road. Then, all feasible motors and ball screws, which can drive the load and satisfy the requirement for actuator size, feasible torque and speed of motor, characteristics of the planetary gears and ball-screw, were selected among the catalogues. Second, the planetary gears were designed according to the combinations of feasible motors and ball-screws to minimize the size of the planetary gear with the constraints of Hertzian pressure and bending fatigue strength, respectively, thus all feasible combinations of motor, gar ratio and ball-screw were achieved. Finally, the multi-objective optimal combination was obtained with respect to actuator weight, starting acceleration, air gap closing time during braking, and motor output torque.

Key words: vehicle engineering, gearhead and ball screw driven, two-stage driving, dynamic load, electromechanical brake actuator, multi-objective multi-constrained optimization

CLC Number: 

  • U463
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