Design Of Control System For Double-end Drive Supercharger Bearing Test Machine

For bearing fatigue life,there will be a certain deviation from the theoretical calculation of the life.So using the bearing testing machine to carry out the life test of bearings was an important means to determine the fatigue life of bearings.At present,the traditional bearing testing machine was cumbersome to operate,the test efficiency was low,and data collection was difficult.And it was generally used to achieve higher power spindle rotation speed,resulting in too large testing machine,over temperature,and safety and reliability are poor.In response to these problems,this paper designed a double-end drive test machine control system,coupled with a double-end drive turbocharger bearing test machine.The system simplifies the complicated operation flow of the traditional testing machine,realizes the synchronous control of the dual motor,realizes the higher rotation speed under the small power,reduces the volume of the testing machine,and can preset the test process steps and automatically save the test data,which can improve test efficiency while ensuring reliability.1.The multi-motor synchronous control strategy was studied.The synchronization error of the two-motor was analyzed.The mathematical model of the dual-motor synchronous control system was established.The cross-coupling controller was designed.Based on the cross-coupling controller,a cross-coupling fuzzy-PID controller is developed by combining the advantages of conventional PID control and traditional fuzzy control.The simulation of the developed controller was carried out by LabVIEW software.The simulation results show that the synchronization error of the cross-coupled fuzzy PID control system was much smaller than that of the conventional PID control system,and it had certain The adaptive ability was more resistant to interference.2.The design scheme of the control system hardware platform was developed.To build the control system hardware platform,the communication protocol between hardware was studied with analyzed and selected the appropriate hardware communication methods,computer,frequency converter,temperature sensor,temperature control instrument,pressure sensor,Vibration acceleration sensor,serial expansion card,data acquisition card,etc.3.Using LabVIEW software as the development platform,the working process of the control system software program was analyzed,and the software system was designed and implemented,including data acquisition and control,load load control,speed control,dual motor synchronous control,alarm shutdown,data automatic saving and other functional modules.4.After the completion of the test machine control system,the overall performance of the test machine was tested several times.The test results show that the control system software interface was simple and intuitive,easy to operate,each function module works stably and reliably,and the control precision was high,all of which have reached the expected design requirements,which was a certain practical value for improving the performance of the bearing test machine.