论文部分内容阅读
列车制动条件下材料的摩擦性能测试是研制高性能摩擦材料的必要手段。在非惯性试验台上,为实现测试摩擦材料定速和惯性两种速度条件下的摩擦性能,通过构建速度变化模型,利用变频调速技术,提出了兼顾这两种模式的控制方法,并应用虚拟仪器开发平台LabVIEW构建基于PC机的数据采集和控制系统。对于定速检测,系统给出恒定电压信号实现电机恒速运行;对于惯性检测,系统依据构建的列车速度时间方程给出变化的电压信号实现电机变速运行。测控系统运行结果表明:定速和惯性两种功能满足了摩擦材料性能的测试要求。
The friction performance test of the material under the condition of train braking is an essential means to develop high-performance friction material. In non-inertia test bed, in order to realize the friction performance under two speed conditions of fixed speed and inertia, the control method of taking both of these modes into consideration is proposed by constructing the speed variation model and using the frequency conversion speed regulation technology. Virtual Instrument Development Platform LabVIEW to Build PC - based Data Acquisition and Control System. For constant speed detection, the system gives a constant voltage signal to achieve a constant speed motor operation. For inertial detection, the system gives a variable voltage signal based on the train speed time equation to achieve variable speed motor operation. The results of the monitoring and control system show that the two functions of constant speed and inertia meet the testing requirements of friction material performance.