A FLEXIBLE EXPERIMENTAL SYSTEM FOR COMPLEX MICROASSEMBLY UNDER MICROSCALE FORCE AND VISION-BASED CONTROL

作者:Xie Hui*; Rong Weibin; Sun Lining
来源:International Journal of Optomechatronics, 2007, 1(1): 81-102.
DOI:10.1080/15599610701232648

摘要

A flexible experimental system developed for efficient and stable complex microassembly is presented. The system consists of a set of modules that can adapt their shape and function to various assembly tasks. Due to the basic limitations of microscopic vision, a wavelet-based focus measure to obtain both high precision and robust autofocusing, a control scheme with a modified Smith predicator to decrease the inherent time delay of vision systems, and microscopic vision/force integration to control the assembly tasks are proposed. A smart 3-D PVDF (Polyvinylidence Fluoride) force sensor is employed to sense the interactive force. Analysis and microassembly of three planetary gears demonstrate that this system has high flexibility.