The configuration space method for kinematic tolerance analysis

摘要

We present an overview of our kinematic tolerance analysis algorithm for mechanical systems with parametric aprt tolerances.the algorithm constructs a variation model for the system,derves worst-case bounds on the variation,and helps designers find unexpected failure modes,such as jamming and blocking.The variation model is a generalizaing of the configuratin space representeation of the part contacts in the nominal system.The algorithm handles general planar systems of curved parts with contact changes,including open and closed kinematic chains.It constructs a variation model for each interacting pair of parts then derives the overall system varation at a given configuration by composing the pairwise variation models via sensitivity analysis and linear proramming.Our implementation analyzes systems with up to 100 parameters in under a minute on a workstation.