The Research And Realization Of The Motion Control Technology Of Computerized Flat Knitting Machine

In recent years, while the domestic demand of flat knitting machine is increasing,domestic flat knitting machine technology develops relatively slowly. High-end flatknitting machine market is occupied by foreign companies, while the prices are high. Inorder to fill the gap in the market, to enrich species of the control system of domesticcomputerized flat knitting machine, and to improve the technical level of the domestic flatknitting machine, the thesis is committed to the research and development of the motioncontrol system of computerized flat knitting machine with independent intellectualproperty rights.This thesis analyzes the structure of flat knitting machine with single machine headand dual system, and studies the working principle of the flat knitting machine in-depth.According to the control demand and user needs, the thesis establishes the upper,middle, and lower structure of the hardware of the control system, choose ARM+Linuxas the platform of the upper and middle controller. The thesis introduces the overallworking principles of the flat knitting machine, designs the overall software process of themotion control module, and introduces the state machine of the motion control module.The thesis has realized the communication interface of the upper-middle and middle-lowermachine.As for the key technologies of the motion control module, the thesis has realized thefile format of the FKW file (Flat Knitting machine Working file) and interpretationmodules, and FKW is used to control the three motors and moving parts of machine headof the flat knitting machine. As the FKW only provides the total number of pulses and thetotal running time of the motor, the thesis has realized the servo motor interpolationtechnology based on time constraints. In view of the signal interference as well as the needof speed control of the machine, the thesis has realized the signal processing module andthe speed control method. In addition, the thesis has realized the control technology of themain servo motor, the shaker servo motor, and the main roller motor.The verification system is constituted by the upper, middle and lower machine and3motors. Then experiments are done on the machine aiming at certificating and debugging.At last, two typical sweater are provided.