Multi-motor Synchronous Coordination Control In Printing And Dyeing Machines

In recent years,with the continuous improvement of the people's living standards,people have higher and higher requirements for the quality of textile printing and dyeing,which puts forward higher requirements for modern printing and dyeing technologies,printing and dyeing equipment,and printing and dyeing techniques.Most of the current printing and dyeing equipment is a multi-unit combined processing machine.Multiple AC motors or DC motors are used as the driving source.The rotation speed of each motor is coordinated and synchronously operated according to a certain proportion to meet the printing and dyeing process requirements.Multi-motor synchronous control system is the basis for realizing the coordinated and synchronous operation of multi-motors in dyeing machines.The issue of synchronous control of multi-motors is also a key issue to be solved in the dyeing machine control system.It directly affects the performance of the printing and dyeing equipment and the quality of the dyeing and printing products.Therefore,the technology,theory and algorithm of multi-motor synchronous control of printing and dyeing machines are continuously proposed and improved.Among them,PID algorithm is widely used in the multi-motor synchronous control system of printing machines because of its good control performance and simple method.However,the traditional PID control is difficult to adjust due to the PID parameters in the control process.In the face of the complex nonlinear disturbances such as load fluctuations,roller diameter differences,and load torque during the operation of the motor drive system of the printing and dyeing equipment,overshoots tend to occur.Slow speed,poor control accuracy,poor tracking synchronization,and other issues.In the process of multi-motor synchronous operation of printing and dyeing machines,the traditional PID control multi-motor synchronous control system is subject to nonlinear disturbances and problems such as large overshoot,slow response,and low control accuracy.This paper proposes to use fuzzy inference to obtain PID control parameters.The control method dynamically changes the control parameters of the PID controller so that the controller can better meet the system change requirements.The main work of this article is as follows:Firstly,this paper introduces the background knowledge of multi-motor synchronous control of dyeing machine and the significance of the research.It analyzes the research status,development trend and problems of multi-motor synchronous control of dyeing machines.It also introduces the main contents of the research and the structure of the paper.Secondly,this paper analyzes the structure,printing and dyeing process and control requirements of the printing and dyeing machine,proposes a multi-motor synchronous control system scheme based on the master-slave control method and fuzzy PID control algorithm,and determines the single-chip microcomputer,encoder,counter,frequency converter and communication.Network and other multi-motor synchronous control system architecture.Thirdly,this article has determined that adopts 16 bit PIC one-chip computer as the main control chip,has designed the hardware of multi-motor synchronous control system and the communication network based on CAN bus line.Fourthly,according to the multi-motor synchronous control scheme of the printing and dyeing machine,the main program and each module program of the multi-motor synchronous control system for the printing and dyeing machine are designed.Fifthly,based on the introduction of fuzzy control and conventional PID control algorithm,this paper expounds the design process of fuzzy PID controller,the setting and adjustment of parameters,and the realization of synchronous control of multiple motors.Sixthly,this paper designs a speed-coordinated synchronization experiment and a decoupling experiment for speed and tension for a multi-motor synchronous control system.The conventional PID and fuzzy PID control are compared and analyzed.The experimental results of square wave and triangle wave velocity tracking show that the steady-state error of the motor speed is decreased by about 4.5% compared with the conventional PID,and the slave motor follows the master motor with faster response and smaller steady-state error.Synchronous control better.The speed and strain decoupling experiment results show that under the condition of load mutation,the speed response speed of the motor under the fuzzy PID control is faster than that of the conventional PID control,the steady-state error is smaller,and the tension curve overshoot is smaller,the average drop of about 23% shows that the control system based on fuzzy PID algorithm has strong robustness and control effect.The simulation and test results show that the fuzzy PID controller can greatly improve the tracking speed of the multi-motor synchronous system,effectively reduce the overshoot of the system,improve the robustness of the system,and can be better applied to multi-motor synchronous control of the printing and dyeing machine.,effectively meet the printing and dyeing process requirements.Finally,it summarizes the work done in this paper and gives suggestions for subsequent research.