Changyin Gao

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Abstract A real-time path generation method with Non Uniform Rational B Spline(NURBS) technology in the Computer Aided Design(CAD) field is presented and realized in a five-axis Computer Numerically Controlled(CNC) system. In this method, the tool path was represented into two NURBS curves, tooltip and tool-orientation spline curve, based on the same knot(More)
The bending effect of a piezoelectric quartz beam under uniformly distributed load is studied. First according to the anisotropic elasticity, the differential equation in the form of plane stress function is obtained, and then the bending stress components are calculated. By the piezoelectric equation the polarization is obtained. By means of the(More)
The bending effect of a piezoelectric quartz beam is first investigated in the paper. According to the anisotropic elasticity and Maxwell electromagnetic theory, the stress field and electrostatic field is deduced. The distribution of the electric field in the piezoelectric beam is calculated by the Finite Element Method. Based on the theoretical analysis(More)
In this paper, a capacitive sensor is used to monitor the dielectric response of the pressboard and to calculate the moisture content in the pressboard by using calibrated expressions. The structure of the capacitive sensor and experiment system are introduced. The kinetics of the drying process is discussed. Models of moisture content diffusion and(More)
According to the automation theory of control, the dynamic characteristic of the novel piezoelectric drilling dynamometer based on the torsional effect is investigated in the paper. The mathematical model of the drilling dynamometer has been built, and then the formula of the amplitude error is deduced. It is pointed out that the drilling dynamometer can(More)
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