Research And Design Of Motion Control For Elastic Membrane Coating Device

Flexible material processing is a kind of processing, which is widely used in the textile, paper, printing and film material processing industries. As the development of new technology and new process, the coating processing on flexible film material is also more widely used in the applications of material processing in the fields of semiconductor manufacturing, biomedicine, new energy and so on. In the continuous manufacturing of membrane electrode in the fuel cell, the catalyst is needed to be located coating on the proton exchange membrane. As the proton exchange membrane is flexible film material, precise positioning control of elastic material roll is became one of the most important control problems in the processing.In the motion control device which is designed for the coating processing on flexible film material, a permanent magnet synchronous motor is used as drive device. The non-linear characteristics which are compositions of gap characteristic of electromechanical system and deformation characteristic of flexible material make it more difficult to finish precise dynamic positioning control of pre-marked elastic material roll.According to positioning control of elastic material roll, the rapid and accurate method is studied. As the membrane is elastic material, the traditional control method of the rigid material is not fully suitable to the system. The detailed dynamic analysis is made for the system; we obtain the transfer functions in each section. An elastic deformation model is presented for compensation in the control system. An improved fuzzy-PID control algorithm is designed to enhance the system dynamic performance. A simulation research on the positioning system based on the elastic deformation model is performed. The simulation experimental results show that elastic deformation model can well reflect the characteristics of elastic material in the motion system. Fuzzy-PID algorithm can effectively reduce the system dynamic overshoot and improve the accuracy of the control system.Then the hardware design of the digital control system is dissertated in detail. The controller of the system is built by using the TMS320LF2812. The design of detail circuit includes:the position of the rotor, three-phase windings phase current, speed and load position detection circuit. Besides, the drive circuit of the system is designed by RS1A10AA.Finally the software design of the digital control system is dissertated in detail. The software of the system includes:initialization program of DSP, detection subroutine, ADC interrupt service subroutine, regulation control procedure, driver control procedure, network communication procedure and so on. The main goal is achieving the system's location, speed, current detection and the closed-loop control functions.The backlash compensation and elastic compensation is the object of the research. But for the limit of the time, the discussions were carried out preliminary. The completion of this thesis, laid a good foundation for transmission machinery backlash, elastic deformation compensation, the modeling and simulation of the membrane synchronous position control system.