Investigation on the Bending Behavior of Tea Stalks Based on Non-Prismatic Beam with Virtual Internodes

The study aims to fully explicate the bending behavior of tea stalks under condition large deflection, which is crucial improve working performance mechanized harvesting equipment. mechanical model stalk was assumed be a non-prismatic beam with virtual internodes that could differ from actual internodes. With model, can freely divided into multiple internodes, whose flexural rigidities determined by solving an optimization problem, and deflection curves predicted after determining positions nodes given loads. Moreover, novel method proposed obtain curve based on techniques binocular vision non-uniform rational B-spline (NURBS) fitting. results show R-squared values fitted 2nd-degree NURBS shape range 0.9576 0.9964, average 0.9797. indicate rigidity decreases bottom top stalk, more precisely piecewise than rigidity. applied design cutter adaptive adjustment operational parameters for picking machines.