Research On Coordinated Control Of Multi-motor Speed Sensor Based On Active Disturbance Rejection

With the rapid development of industrial technology,the driving mode with multi-motor system as the core is widely used in the fields of shield cutter rotary cutter,load drive,continuous rolling mill,textile and finishing dyeing machinery.Improving the synergistic performance of multi-motor systems and improving the precision of collaborative control have important value for the actual industrial production efficiency and product quality improvement.The deviation of the rotational speed of the traditional multi-motor deviation coupling control system is compensated by the different moments of inertia of each motor.This makes the multi-motor coordination system unable to achieve high-performance control requirements.Therefore,it is important to carry out research on multi-motor cooperative control system.Theoretical significance and application value.In the multi-motor coordination system with traditional deviation coupling control,the deviation coupling between motors is compensated by the different moments of inertia of each motor.This method makes the coordination performance limited;in addition,the multi-motor coordination system with bias coupling is susceptible to disturbance.Influence,these interference factors will make the synchronization error between each motor become larger,which will affect the overall performance of the coordinated system;the motor speed of the multi-motor system is measured by the speed sensor.The traditional motor speed flux linkage observation method is due to the pure integral link.Existence,easy to cause the accumulation of observation errors,making the speed estimation inaccurate,resulting in multi-motor synergy performance degradation.In view of the above problems,this paper improves the traditional deviation coupling control structure,gives each motor a different weight value to enhance the tracking performance of the system,and then adds additional feedback compensation links to further improve the synergistic performance of the multi-motor system,and builds The multi-motor cooperative system simulation model of the deviation coupling structure is improved,and the synergistic performance of the multi-motor system under different states is analyzed.On this basis,the Active Disturbance Rejection Control(ADRC)of a single motor is designed by using the principle of separation.The core parameters of the ADRC are optimized by genetic algorithm,and the self-resistance of the design is designed.The disturbance controller is applied to a multi-motor system with improved deviation coupling,and the disturbance disturbance in the speed signal is observed and compensated by the auto disturbance rejection controller.In addition,in order to realize multi-motor speed sensorless control,a modified second-order generalized integrator(SOGI)flux linkage observation method is presented.By adding the proportional-integral link,the traditional flux linkage observation erroraccumulation is solved.The problem with DC offset.Finally,through simulation comparison,the improved multi-motor deviation coupling control system is much better than the traditional structure,and the synergistic performance and dynamic performance are greatly improved.The introduced auto-disturbance suppressor can effectively suppress the influence of disturbance and enhance the robustness of the system.Based on the improved second-order generalized integrator's flux linkage observation method,the influence of error accumulation and DC offset can be well suppressed,and the accuracy of speed estimation can be improved.