Quality and uniformity control of fiber web by roller card system Part I: dynamic modeling formulation and experimental identification

This paper focuses on the uniformity of fiber web output by roller cards, because control of uniform carded fiber webs becomes very important when we want faster and more accurate textile spinning. It will theoretically build the model of the dynamic system, and experimentally verifies the model with an implemented sensor. The system analysis, according to working properties and the active region, is divided into three parts: feed input, main carding, and doffer output. The system input is the mass flow rate of the fiber web per unit area. Firstly, the mathematical model of fibers at the main carding will be obtained, and then the mathematical models of the mass flow rate of fiber web at the input and output will be deduced. The mathematical model of the entire roller card system is finally derived by integrating the aforementioned three parts. The computer simulation confirms that the roller card is a stable system, as was shown in the real system. In the experimental verification, this paper measures th...