Papers by Author: Zhi Yong Yang

Abstract: On the basis of analyzing the structure of precalciner,normalized handling of the precalciner structure,determined parameters of the precalciner model.The fast modeling system of the precalciner is established by using the secondary development tool of SolidWorks software.Using Ansys software,the strength analysis of the precalciner is realized.This system provides a simple and convenient modeling and analysis method for designer.It is helpful to improve the design quality and working efficiency and to shorten the design cycle.

Abstract: A new method of PID parameter tuning of the interrelated servo-motors is developed. This method is applied to PID control of the interrelated servo-motors which selects overshoot and rising time as optimization variables according to the working characteristics of servo motor, determine the PID parameters quickly and accurately, can meet the requirements of engineering and greatly improve efficiency.

Abstract: This paper takes bubbles of bubble shell as research object, mainly studies two bubbles arranged in a vertical position. Applying VOF (volume of fluid) method to simulate interaction between two bubbles, analyses the effect of center distances and diameters on deformation and coalescence of bubbles. Results show that coalescence time of two bubbles with same diameters increases as the center distance increases. To two bubbles with different diameters, when the bigger bubble located beneath at the initial time, the smaller bubble moves upward first and then moves downward before two bubbles coalesce. When the smaller bubble located beneath at the initial time, bubble coalescence cannot happen. This paper is the basis of bubble group research, it is of positive significance to the bubble group research and performance improvement of bubble shell.

Abstract: Biopsy precious research has an important relationship with treatment efficiency and side effect complication. Most of the investigation is focus on the non-creatural material which is used to substitute creatural soft tissue for precious research. The aim of this paper is to develop a prescription that can be used for opaque and transparent PVA making which has similar mechanics property to the creatural tissue. The preparation, characteristics, and the results of PVA hydrogel on the composite material are studied as the key investigation. Porcine liver tissue property is also tested as a consultant for PVA material preparation. Comparing with the liver tissue test result, certain component ratio and freezing-thaw circle are determined. This PVA hydrogel material shows big potential in the creatural material substitution application. This research will benefit others who are interested in using non-creatural material to do experiment or surgical technology training.

Abstract: In this paper, the open architecture technique is used to develop the computer numerical control (CNC) system of parallel mechanism. The personal computer (PC) with high-performance motion control card Flex-6C and virtual instrument software package are utilized as the hardware and software platforms, respectively. The interface between motion controller and servo system is designed, and the core functional module and control software is programmed. Further it is successfully applied in a series of parallel mechanisms, which serves as the foundation for achieving the high-speed and high-precision control of such kinds of parallel mechanism.