This paper addresses the problem of yarn modeling for fabric simulation using differ ential algebraic equations in order to account for nonlinear phenomena. To this end, we propose a theorical yam model for motion control and study the system from a symbolic and numerical point of view. From a Lagrangian approach, we describe the yarn's behavior and develop a solution. Thus, it is possible to simulate the yam under different situations and constraints and to identify some characteristic parameters.
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