Error analysis of rib curves based on measured data of airfoil-wainscot
The characteristics of accuracy control of large-scale airfoil-wainscot parts are analyzed. The accuracy of airfoil-wainscot is controlled by its rib curves, and the rib curves are straight lines whether after processing or before on the direction of face projection. The method of compensating the radius of measuring probe is presented also based on measuring data from 1D scanning probe. Aiming at the inspection requirement of the measured part and the characteristics of rib curves, the algorithms of curve matching and error analysis are proposed. The experimental results show that the proposed methods can meet the accuracy requirement of online inspection of airfoil-wainscot parts.
Surface reconstruction based on point cloud from laser scanning system
The characteristics of the point cloud obtained with laser scanning system are discussed in the paper, and a new algorithm of surface reconstruction based on point cloud is put forward. Based on the theory of B-spline curve and surface interpolation, the freeform curve and surface reconstruction method - we called the surface as loft surface - are introduced in detail. This method of surface reconstruction is adequately utilized the characteristics of the point cloud from laser scanning system. The experimental results testify that the method is effectual and feasible.
Intelligent memories in VLSI
A concept of an intelligent memory, called an adaptive associative system (AAS), is described from the system level down to the device level. The performance of an AAS is discussed by means of computer simulations in regard to text processing and pattern recognition, especially such outstanding features as fault tolerance, semantic association, autosegmentation, and self-organization of information. The system concept of such a memory is rendered adequate for the VLSI technique by partitioning into repetitive memory units and by introducing a nonvolatile memory cell. The importance of interaction in realizing an AAS as a microelectronic component is pointed out for both system design and VLSI technology.