摘要
以Freescale系列芯片MC56F8346为控制核心,设计了电磁制动机构的控制系统,包括硬件电路与软件程序的设计。通过Matlab/Simulink仿真软件得到电磁制动系统特性曲线,即作用于摩擦衬片的制动力与电流关系曲线,经分析可得,制动力随着电流的增大而增大。电磁力控制部分主要由MC56F8346产生PWM信号,根据采集到的制动踏板的位置信号来调节PWM信号的占空比,并经过信号调理之后控制电磁铁动作,使电磁力随着踏板的位置变化;检测部分是从传感器输出的信号经过信号调理后输入到MC56F8346的ADC模块进行数据采集。最后对该系统进行实验,即软硬件联合调试,实际测试结果证明,所设计的电磁力控制系统具有良好的稳定性、实时性和有效性。
Freescale series chip MC56 F8346 was served as the core of control.Control system of electromagnetic braking mechanism was designed.The system included the design of hardware circuits and software programs.The F-I characteristic curve,which was the relationship between the electromagnetism and the current,was obtained through the simulation software Matlab/Simulink.The electromagnetism was proportional to the square of the current.The main content of the electromagnetism control section was the pulse width modulation(PWM)signal from MC56 F8346.The duty ratio of the PWM signal was adjusted according to the position signal of brake pedal.The action of electromagnet was controlled after signal conditioning.The electromagnetism changed with the position of the brake pedal.In the test section,signals from sensors were adjusted by signal conditioning circuits and then inputted into analog digital conversion module of MC56 F8346 for data collection.Finally,the system was tested.Actual test results proved that electromagnetism control system possessed good stability,instantaneity,and effectiveness.
作者
李娅君
冯国胜
韩超
朱亚光
Li Yajun;Feng Guosheng;Han Chao;Zhu Yaguang(School of Electrical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)
出处
《石家庄铁道大学学报（自然科学版）》
2019年第1期56-62,共7页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
基金
河北省科技计划项目(17392202D)
石家庄市科研计划项目(161080401A)
