| Summary: | 博士 === 國立臺灣科技大學 === 高分子系 === 95 === Putting deformation amounts of the pressing and pressed rollers under control is crucial to enhance calender’s product quality. Currently in the industry, trial and error is still used to determine each part of dimension of these two kinds of rollers, which makes it difficult to determine the optimal design parametric values. In this paper, the calender pressed roller is modeled as a distributed system. It is well known that, in general, the vibration and displacement at any point of a distributed system can be represented as the superposition of an infinite number of vibration modes. In the industrial operations, the capability of suppressing all the vibration modes during different operating conditions is necessary from the designed controllers that can effectively control the machine to accomplish its task without exciting excessive mechanical vibrations. The major objectives of this paper is to control the calender pressed roller, no need for both of the pressed and pressing rollers, to reach the amount of convexity adjusted online, which in turn leads up to the leveling of the contact surface between the calender pressing roller and the calender pressed roller during processing. In the transient response of the calender roller system, the settling time is expected to be short, reach the non-overshoot controller design, and arrive good tracking property. Fast tracking performance and settling times, and low energy consumption while minimizing vibrations must be provided by a high performance calender roller system. The different kinds of PID control strategy were designed to improve the performance of calender roller system. The traditional PID (proportional pus integral and derivative) controller was designed to expedite the response of the calender roller system without steady-state error. But the overshoot has been existed. The shaping input scheme together with the designed PID controller was employed to regulate the calender roller system input, so as to generate system non-overshoot and shorten the settling time. A regulating reference input technology combined with the aforementioned PID type control scheme is proposed for robustness and dominant mode vibration suppression. This combining scheme possesses the advantages of simplicity and effectives, and because no additional sensor and actuator are required. Finally, In the textile industry, the fabrics must accept various kinds of processing steps in order to meet the mass production requirement. To cope with this demand, the tail end of the fabrics must be sewed together with the front part of the next fabrics to be processed. In this paper, the neural system controlled automatic stitch detection device is successfully designed. This system can avoid operating on the sewed area and work with the programmable continuous processing control, so that the surface of next fabrics can be processed in order to maintain an integrated function of automatic continual processing control. A photoelectric component is used to automatically detect the changes of fabric thickness and transform the thickness variation to electrical signal for sending to the neural controller so as to determine the position and the length of such sewing area. After being fed from the neural controller, the signal skips the sewing area and thus achieving the unceasing processing purpose.
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