【作者】 周胡丽；

【导师】 陈进；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 制动装置是火车安全减速或停车的重要装置。为保证火车的安全，必须在各种条件下都能保证火车的制动性能。随着列车运行速度的不断提高，对制动装置的制动性能要求也更高，传统的闸瓦制动适应不了高速列车的发展。目前我国的铁路客车基本都已采用了盘形制动，火车刹车片是盘形制动装置的重要组成部件，它对制动性能有着举足轻重的作用。火车刹车片测试系统是建立在刹车片制动试验台的基础上，测试火车刹车片的摩擦性能。论文根据《盘形制动试验大纲》要求，提出对火车刹车片制动试验台的设计方案，主要由电动机、联轴器、制动装置、支座、测试装置等几个部分构成。根据设计方案的总体布置，选取合适的交流电动机，采用变频控制方式控制电机转速。结合试验台的结构特点，进行测试系统的设计。火车刹车片测试系统以总成试验的方式来测试刹车片的承载压力、表面温度、车轮运行速度等多项性能参数，结合实际选用合适的传感器。系统主要由上位机和下位机两部分组成。下位机采用ADuC841作为控制单元，控制压力、温度、速度的采集。上位机(即PC机)通过RS485串口通讯与下位机相连。上位机采用Visual Basic设计一个控制软件，对采集数据进行分析处理，最终生成刹车片的摩擦系数曲线图，可以直观的分析刹车片的摩擦性能。该软件还包括对变频器的控制模块，通过串口给下位机传送指令改变变频器的输出频率，实现对电机转速的控制。最后经过对测量结果的分析，可以看出火车的制动初速度与刹车片的表面温度都是影响火车刹车片的摩擦性能的重要因素。更多还原

【Abstract】 Brake is an important equipment which offered emergency braking and safety deceleration when train run on tracks, in order to ensure safety of the train, good brake performance should be provided under any condition. As the speed of operation is continually rising, traditional brake shoe braking no longer fit the high speed train’s development, so good performance of brake equipment is to be request. At present, disc braking has applied almost in all our country’s passenger train. Brake pad is an important composition part of disc brake equipment, it has pivotal function to the braking quality. Therefore, the exploitation of brake pad’s braking ability test bed will become a vital topic in the domain of train braking; better train brake pads are required to be developed.The test system of train braking pad was built on the braking test-bed to measure the friction ability of the braking pad. A design proposal of train brake pads brake tester was introduced in this paper which based on the requirement of "outline of the brake pad performance test", mainly composed electric motor, shaft coupler, brake equipment, bearing, testing equipment and so on. According to the total arrangement of design proposal motor was selected, the motor was controlled by the frequency conversion. Then the testing system was established.This essay explained the primary principle and the testing method of the test system. The test system contained the measuring modules of the pressure and the surface temperature of the braking pad, and the rotate speed of the wheel. It was composed of single chip system and computer system. The single chip system controlled the gathering of the parameter; the computer system communicated with the single chip system by serial interface. In the computer system there was a control software which can analyze the parameter and acquire the friction curve of the test pad. In the last part of the paper test result was analyzed, we received a conclusion that the friction of the train pad was influenced by the first rotate speed of the wheel and the surface temperature of the braking pad.更多还原