| There has been a rapid development in the chemical fiber industry since China's reform and opening .The output of chemical fiber had reached one million tons in China in 1985 from ten thousands tons in 1970, and 9.28 million tons in 2001, which is occupied 24 percent of global gross production. According to the prediction made by related authorities, the annual production of textile fiber will increase at the speed of 3%, in which the chemical fiber yearly increments will attain to 4.4% in the world until 2010.With the development of chemical fiber industry, the chemical fiber machine has been promoted greatly, whose total trend will be of high capacity, continuity, high speed, automation and intelligence. The winder is the key unit of spinning equipment, In order to meet the requirements of markets, it is most important to research and develop the high-speed spindle-driven winder quickly.A winding system for the type of EJQ296-6 high-speed spinning winder is studied. There are some primary influence factors such as the vibration characteristic of spindle in the winding process, the dynamic compressive characteristic of packages should be considered when the winder's control system is designed in the first step. In this paper these factors are analyzed in detail, at the end the theoretic results are compared with the result of test data.The equipment is a carrier of the process technology, so the chemical fiber machine must be developed on the condition of cooperation closely with the process. However, that is one of the reasons why the native high speed winder is developed slowly. In the chapter 3 of the thesis, the actual package diameter can be figured out by virtue of the real time detected relative velocities of the contact roller and the spindle, at the same time, according to the output of metering pump, the actual density of package basing on the theory of conservation of mass can be deduced, and the models of spindle-driven winding can be established on the ground of thequality spit by the linear density and the length of the filament. By means of adjusting the winding ratio and the angle, the model of traverse reciprocation motion is established. As a result, the filament on the package surface is arranged regularly without ribbon breaking, and the package has excellent winding-off performance.The core part of the control system is the hardware and the software designed, additionally, including control algorithm. Therefore the controlling platform is established with the programmable computer controller (PCC) of B&R Company in the thesis. By virtue of the B&R Company's software development environment, the total program is divided into many modules such as the winding preparation, the device start, the speed adjustment, the speed detection, the logic control, the stop module and so on. Furthermore, the man-machine communication and the process monitoring are programmed by VB language, the control algorithm of the BP neural network which overcomes the some drawback of the traditional PID algorithm is used in the PID controller, so the degree of control accuracy and the package building are improved greatly.On the ground of the theory of the PID and BP nerve network, the Matlab and Simulink powerful tools are applied for alternating current frequency control in the simulation program of experiment, and the application results compared with traditional PID control algorithm are shown in the paper. All the schemes designed are satisfactory for the actual operation of related equipment.From what has been discussed above, modeling, system design, emulation experiment and site test about the spindle-driven winder control system design are described in the paper. Moreover, the anticipated target and control requirement are attained well. Consequently, this paper can provide the designer with the theoretical and practical knowledge for developing and improving the high-speed spinning winder in the future. |
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