Microtension control for a yarn winding system with an IMC PID controller

Abstract

In this paper, feedforward compensation and an internal model control (IMC) PID tuning method to maintain the yarn tension within a micro-boundary range are proposed. The proposed method can be used to improve the quality of products in textile industry. We first develop a mathematical model of the AC servo motor and yarn tension system. Based on the results of the mathematical model, an IMC PID controller is designed to control the microtension of the yarn. The proposed IMC-PID controller can be directly calculated from the time constant and time delay. Feedforward control is used to compensate for the linear velocity of the winding roller. To reduce the lateral vibrations of the yarn, we designed an active roller to nip the moving yarn. The active roller compensates for the variation in the diameter of the unwinding roller. The proposed method effectively improves the dynamics performance and the robustness of the system, and is appropriate for industrial application. Experimental instruments, including a tension sensor, an AC servo motor and a motion controller, equipped with a computer, are used to test the proposed method. The simulation and experimental results show the effectiveness of the proposed controller for the yarn microtension control system.

Effect of IDT position parameters on SAW yarn tension sensor sensitivity

“…, k 5 are regression coefficients, and e is random error. To build the model shown in equation (13), the data sample ( s i , D li , D ti ð Þ , i = 1, . .…”

“…) is acquired as shown in Table 4. The software tool MATLAB is used to solve the least square estimation of the parameters in equation (13). The solutions are k 0 = 640:87, k 1 = 29:86, k 2 = À 44:29, k 3 = À 0:97, k 4 = 2:99, and k 5 = À 1:09.…”

“…The solutions are k 0 = 640:87, k 1 = 29:86, k 2 = À 44:29, k 3 = À 0:97, k 4 = 2:99, and k 5 = À 1:09. Those parameters are put in equation (13), which can be written as s = 640:87 + 29:86D l À 44:29D t À 0:…”

“…Yarn tension is often the key factor in the process of yarn production. [12][13][14][15] If too much force is supplied, the yarn will be snapped. If there is not enough force, the yarn will become loose and curled.…”

Current Situation Analysis and Future Development Trend of Automotive Engineering Control System

“…With the continuous improvement of people's safety awareness and the increasingly strict national regulations and standards, automobile manufacturers continue to optimize and transform automobile safety technology in the production process, and strive to ensure vehicle safety to the greatest extent in the production process [7][8]. Because ESC system can improve the driving stability and driving safety of vehicles under various driving conditions, it has become one of the most important active safety systems since its birth, and gradually become one of the standard safety devices of vehicles [9][10].…”