Structure Design And Shape Imitation Of Flexible-belt-net Based Robotic Mannequin

Robotic mannequin is an electromechanical device that mimics the human body.It can replace the real fitting and get the dress effects on different body shapes,which is considered to be an effective way to solve the garment fitting problem in clothing ecommerce.Existing robotic mannequin mainly use block structure,each block is an elastic panel with a specific shape and size,and is used to simulate the corresponding shape of human body.In imitation,each flexible panel can only move in a specific direction,which results in insufficient flexibility of the imitation.The displacement between the adjacent elastic panels tends to be misaligned,resulting in a deficiency in the accuracy of the patterning.In this paper,a new robotic mannequin model is proposed,which uses a flexible net structure.The outer surface of the robotic mannequin is provided with a flexible-belt-net composed of longitudinal flexible belts and lateral flexible belts,and the flexible belts are controlled by the movements of the internal elastic bars to imitate different human body shapes.The research is carried out from following three parts:(1)Geometrical design of robotic mannequin.The shapes of robotic mannequin is displayed by the feature curve net.The feature curve net of robotic mannequin based on the parametric human model is designed which can imitate transverse and longitudinal characteristic lines with flexible belt.The feature curves can not only fully represent the shape characteristics of the human body,but also can be easily imitated by the flexible belts controlled with the Mechanisms.(2)According to the geometry design of the robotic mannequin,the mechanical structure of the flexible-belt-net robotic mannequin is designed.The overall structure of the robotic mannequin is divided into shoulder,chest,waist and hip four layers,due to the limited internal space of the robotic mannequin.The distribution of longitudinal felxible belts is also designed.The shape and the number of the elastic bars controlling the transverse flexible belts in the shoulder,chest,waist and hip characteristic layers are respectively designed.A driving mechanism for controlling the position changes of the elastic bars is designed.(3)Imitation computing of robotic mannequin.This part mainly includes the reverse imitation and the forward imitation.The task of reverse imitation is to compute the positions of elastic bars and the lengthes of felxible blets,given the the target 3D human model.The control parameters of the motors which control the movements of the elastic bars and the lengthes of the flexible belts are solved by the position and the shape change respectively.The task of forward imitation is computing the shape of robotic mannequin,given the postions of elastic bars and the lengthes of felxible blets.Prototype system of the flexible-belt-net based robotic mannequin has been developed.The robotic mannequin can well imitate various shapes of human bodies.