Research Of Control Of Let-off,take-up And Fuzz Of Upscale Towel Loom

With the advantage of high-speed, high-quality and high level of digital technology,upscale towel loom have been dominated in the market of upscale towel loom.Its control systems consist of the main control system and control system of let-off, take-up and fuzz. To improve the grade of towel fabric, let-off, take-up and fuzz control system control system is the key section.The control of warp tension,fabric density and the switch of terry varieties play an important role in weaving wavy hair, relief hair, uneven hair, combined hair and other upscale fabric.Based on the analysis of the requirements of control of let-off, take-up and fuzz of towel loom,a controller based on ARM integrated let-off,take-up and fuzz was designed. Embedded real-time operating system μC/OS-III was taken as the software development platform, and CAN bus based on C ANopen slave protocol was applied in real-time communicating with the main control system.This paper mainly completed the following work:(1) The control requirements of let-off, take-up and fuzz of towel loom were analyzed respectively, and the process parameters involved in the control process were summarized. As the direct control object of the main control system, the input and output signals were analyzed when communicating with the main control system,the control block diagram of let-off, take-up and fuzz was planned.(2) Control strategies of let-off, take-up and fuzz were formulated respectively. A tuning algorithm of PID parameters based on RBF Neural Network about tension control was developed,and simulated on MATLAB and Simulink tools to verify its feasibility.(3) The hardware platform and anti-interference based on STM32 chip and related functional circuits were designed,including the collection of spindle encoder circuit, the CAN communication circuit, the A/D converted circuit, the motor drive circuit.(4) The functions and features of embedded real-time operating system μC/OS-III were analyzed,the kernel of μC/OS-III was transplanted on the hardware platform, twelve task modules were divided,the application and drive of related hardware modules were programmed,the realization of main task modules were analyzed,application layer of CANopen was designed.(5) Related programs were debugged in the the hardware platform, including the collection of spindle encoder,warp tension, CAN communication.