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Articles by Ma Tieqiang
Total Records ( 2 ) for Ma Tieqiang
  Sun Wei , Ma Tieqiang and Li Tao
  Feature-based method is the focus of heterogeneous CAD model exchange. In order to keep the consistency of design intent in heterogeneous CAD model exchange, a constraint conversion method was proposed. Firstly, Feature transformation ways were given to support the correct conversion of constraint. Secondly, the geometric certificate was improved to identify geometric elements and geometric element is the acting object of constraint. Thirdly, the constraint conversion method on level of feature was proposed corresponding to different types of feature and the global transformation method of constraint during heterogeneous CAD models exchanging. Finally, a transformation case of part model from CATIA to UG shows that the approach proposed above is effective.
  Ma Tieqiang , Wang Shirong and Xu Chengyin
  Virtual assembly technology is applied to check the reasonability of product structure and the correctness of product assembly procedure in the virtual reality environment. In order to realize the assembly information acquirement, assembly sequence planning and assembly procedure checking, a virtual assembly method based on CAD model reuse is put forward. The layered assembly tree traveling algorithm is used to obtain the assembly levels, assembly relations and assembly constraints. The assembly matrix analysis method is applied to obtain assembly sequence of component and the final assembly sequence is compounded of assembly sequences of all components top-down. The imaginary projected profile sweeping method is proposed to check interferences among parts and it converts the dynamical assembly checking to the static. The proposed method also provides assembly information for other virtual reality systems. Finally, an application on wind turbine generator system verifies the effectiveness of this method.
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