The Study Of Strip Deviation Control System Based On Intelligent PID Control

With the development and application of science and technology, strip unwin-ding, winding and transmission basically achieved automation, however, due to uncontrollable factors, retractable strip automated process prone to error, the product quality was seriously affected. To this end, based on the subject in the study of basic principles of corrective control, the analysis of the infrared detection photoelectric sensor was done and so was the control motor performance, focusing on the corrective control algorithm of the control system. The system mathematical model was established, and carried out the simulation used MATLAB, finally, the correction control algorithm was verified in the test stand.In this paper the status of corrective control was described, the difference between the controller at home and abroad was compared, the control strategy to speed up response time and reduce vibration of control system was proposed, the causes of the strip deviation in work process and the common measures of the reduce control deviation were analyzed. The system was to use infrared sensors to detect the offset strip, and then A/D to convert into digital that controller can be identified, sensor offset and digital voltage linearity correction will affect correction quality. This topic focused on the"ladder-style"data processing algorithm for PID parameters, the system transfer function was established based classical control theory, the control algorithm was simulated under MATLAB, control parameters are optimized. According to system simulation curve the influence degree of each parameter and the system performance were analyzed and purpose to adjust the parameters to improve the control quality. An"ladder-style"data management strategy was proposed, each of the"ladder"offset corresponding to each"ladder"PID algorithm parameters, different"ladder"of deviation adaptive selection of the corresponding PID parameters, in the end controller achieved optimal output or near optimal output.Software system used C programming language, and in ICE3TEK-F2812-A intelligent PID algorithm was tested, verified theoretically improve the effectiveness of corrective capacity, to improve the level of domestic correction is very important.