The motion of floating fibers during drafting has been considerably studied with the aim to control the floating fibers effectively,and to improve the slivers regularity.

• 有效地控制须条在牵伸区内浮游纤维的运动,使其变速点分布更为合理,尽可能降低条干不匀率,是牵伸理论研究的基本问题。