ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Improvement of Engineering Dimension Driving Principle and Its Application to Tolerance Analysis
Received date: 2013-07-18
Revised date: 2013-10-12
Online published: 2013-10-30
Supported by
Industry-university-research Innovation Fund of AVIC (CXY2010SH28); A Pre-research Project of The General Amament Department (513180102)
Currently, geometrical and implicit constraints cannot be driven with the functional dimension driving theory, which limits the application of the geometrical element chain method (GECM). To solve this problem, this paper presents a modification of the functional dimension driving theory and constructs an algorithm of tolerance analysis oriented to the virtual constraint model (VCM) to extend the application scope of GECM. Firstly, the causes are analyzed for the driving failure of the functional dimensions, and the necessary and sufficient conditions are given for the existence of the mapping relationship. Secondly, the concept of VCM is put forward for the models in which the functional dimension driving principle doesn't work, and the tolerance analysis algorithm of the VCM is constructed. Finally, an example is given to illustrate the validity of the VCM and the effectiveness of the algorithm in this paper.
Key words： models; constraint theory; fits and tolerances; dimension chain; dimension driving
MENG Biao , WANG Bo . Improvement of Engineering Dimension Driving Principle and Its Application to Tolerance Analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(6) : 1740 -1749 . DOI: 10.7527/S1000-6893.2013.0418
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