Meifa Huang

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Inmost cases, designers have tomanually specify both assembly tolerance types and valueswhen they design amechanical product. Different designerswill possibly specify different assembly tolerance types and values for the same nominal geometry. Furthermore, assembly tolerance specification design of a complex product is a highly collaborative process,(More)
The garbage crusher is one of the important parts in recoverable coal production line. To diagnose its faults during the working process, Back Propagation algorithm is used. However, it has some shortcomings, such as low precision solution, slow searching speed and easy convergence to the local minimum points. To overcome this problem, a novel method which(More)
Operation and operator technologies used in new generation Geometrical Product Specifications (GPS) provide the necessary knowledge basis for digitization and standardization in verification process of geometrical products. This paper analyzes the operator formation for perpendicularity error evaluation of an axis, and presents mathematical models and the(More)
An optimal design method for dimensional and geometrical tolerances (DGTs) has been presented and validated. In concurrent design environment, this method can directly allocate required functional assembly DGTs into pertinent process DGTs by using the given process planning of related components. The geometrical tolerances are treated as equivalent(More)
Representing the semantics of the interaction of two or more tolerances (i.e. composite tolerance) explicitly to make them computer-understandable is currently a challenging task in computer-aided tolerancing (CAT). We have proposed a description logic (DL) ontology based approach to complete this task recently. In this paper, the representation of the(More)
In general, mechanical designers have to manually select assembly tolerance types and values in product design. To reduce the uncertainty in manufacturing process, solve the problem of effectively sharing and smoothly exchange tolerance information among heterogeneous CAD system. On the optimization of tolerance synthesis with an ontology-based approach is(More)
Tolerance representation models are used to specify tolerance types and explain semantics of tolerances for nominal geometry parts. To well explain semantics of geometrical tolerances, a representation model of geometrical tolerances based on First Order Logic (FOL) is presented in this paper. We first investigate the classifications of feature variations(More)
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