Research Of Biax Servo Motor Synchronous Control Strategy Of Laser Welder

With the development of modern machinery industry, many old production lines are faced with the transformation of automation equipment. Today, synchronous transmission of multi-axis servo motor not only increases the power of the transmission of the production line, but also to meet a wider range of mechanical occasion. In the laser welding production environment, there are many confounding factors, which lead to dyssynchrony for multi-axis motor. Thus, for this case, motor control and multi-axis synchronization accuracy have been put forward to higher requirements, and how to improve and enhance the above properties has a very important practical significance.Firstly, the biaxial Permanent magnet synchronous motor AC servo motor of laser welder of old production line in TISCO six rolling factory is put as a prototype of transformation to analysis and research. Based on the field data acquisition, the structural characteristics of the single permanent magnet synchronous motor AC servo system are analyzed and the mathematical model is established.Secondly, four kinds of synchronization control methods are set up: parallel synchronization, master slave synchronization, cross coupling synchronization, and virtual spindle synchronization. By simulating the real conditions in the MATLAB / Simulink software, the performance indexes of start-up response, the synchronization control precision and anti-disturbance of system are compared.Two ways of Master-slave synchronization and virtual master axis synchronization in better static and dynamic performance and higher precision synchronization were selected from the non-coupling and coupling mode respectively.Thirdly, for single motor control precision, PID control are easy to implement, but for complex controlled system and its control effect is far from satisfactory.Therefore, this paper designed fuzzy controller based on PID, the fuzzy experience can be setting of PID parameters in dynamic process and to prove the effectiveness of this method by simulation. At the same time, it can be applied to the slave motor, which can improve the time delay error of the system.Finally, for the synchronous control of the two motors, the synchronous precision of the two motors has an effect on the welding quality. Thus, a sliding mode controller which meets the conditions of the field is designed, that is, the sliding mode control is applied to the synchronous mode of the master slave and virtual spindle.The simulation results show that the improved synchronization control method can enhance the stability and performance of the system, and the synchronization performance is improved, which proves that the design scheme is feasible and can be used as a laboratory alternative.