基于LabVIEW的双端驱动轴承试验机同步控制系统研究

Research on synchronous control system of double end drive bearing test machine based on LabVIEW

以双端驱动轴承试验机为实验平台,对双电动机同步性能进行了研究。建立了基于单轴控制系统模型的双电动机同步控制系统,推导了双电动机电流同步误差传递函数的数学模型,并分析了在典型输入信号下的电流同步误差。在交叉耦合控制的基础上,与模糊PID控制相结合,设计了模糊PID交叉耦合控制器。在LabVIEW软件中搭建了模糊PID交叉耦合控制器的仿真模型,并在轴承试验机上进行验证。仿真和实验结果表明,该控制器在阶跃、斜坡等典型输入情况下可以有效地减小系统同步误差,并且有良好的抗扰动性能和自适应能力,可使轴承试验机系统获得良好的控制效果。

The synchronous performance of the dual-motor was studied on the platform of the double-end drive bearing test machine. A dual-motor synchronous control system based on single-axis control system model was established. The mathematical model of the dual-motors current synchronous error transfer function was derived and the current synchronous error under typical in put signals was analyzed. Combined with the fuzzy PID control, the fuzzy PID cross-coupling controller was designed on the basis of cross-coupling control. The simulation model of fuzzy PID cross-coupling controller was built in LabVIEW and verified on the bearing test machine. The simulation and experimental results showed that the controller can effectively reduce the system synchronous error under typical input conditions such as step and slope, and has good anti-disturbance performance and self-adaptive ability, which can make the bearing test machine system get good control effect.