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对DKC12地下自卸汽车ABS系统进行方案选择及设计,包括通道布置、轮速传感器选型、齿圈设计、新式ABS液压控制系统设计、二位二通高速开关电磁阀相关参数计算。完成基于80C196KB微控制器的ABS系统ECU硬件功能设计,包括单片机最小应用系统设计、单片机系统扩展设计、输入通道设计和输出通道设计。利用MATLAB/SIMULINK建立了以车轮滑移率为控制参数的ABS系统控制逻辑,确定出仿真系统各个模块计算的步长,设计出较为灵活的改变仿真参数设置的方法,以便于进行不同测试条件下不同车辆参数的仿真计算,利用ADAMS/SIMULINK对车辆动力学模型进行联合仿真分析,并与未带ABS系统时车辆制动过程进行对比。仿真结果表明,以车轮滑移率为控制参数的ABS系统模型可以在车辆制动过程中避免某个车轮提前抱死,从而提升了整车的安全性。
The design and selection of DKC12 underground dump truck ABS system including channel layout, wheel speed sensor selection, ring gear design, new ABS hydraulic control system design and two-position two-way high speed switch solenoid valve are also discussed. Complete the hardware design of the ABS system ECU based on the 80C196KB microcontroller, including the design of the minimum application system of the microcontroller, the design of the SCM system, the input channel design and the output channel design. The control logic of ABS system with wheel slip ratio as control parameter is established by using MATLAB / SIMULINK, the calculation steps of each module of the simulation system are determined, and a more flexible method of changing the setting of simulation parameters is designed to facilitate the test under different test conditions Simulation of different vehicle parameters, the use of ADAMS / SIMULINK vehicle dynamics model for joint simulation analysis, and without the ABS system with vehicle braking process compared. The simulation results show that the ABS system model with the wheel slip ratio as the control parameter can prevent a certain wheel from locking in advance during vehicle braking so as to enhance the safety of the vehicle.