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您的检索式：作者名="Xiao Juliang"
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| 1 | Numerical simulation of emergency shutdown process of ring gate in hydraulic turbine runaway 显示文摘 | Xiao Juliang Zhu Enqiang Wang Guodong | 2012 | Journal of Fluids Engi- neering2012，134，12： | 1 |
| 2 | Research on Multi Robot Open Architecture of an Intelligent CNC System Based on Parameter-Driven Technology显示文摘 | Song Weike Wang Gang Xiao Juliang | | 0，，03： | 1 |
| 3 | Base placement optimization of a mobile hybrid machining robot by stiffness analysis considering reachability and nonsingularity constraints显示文摘The mobile hybrid machining robot has a very bright application prospect in the field of high-efficiency and high-precision machining of large aerospace structures.However,an inappropriate base placement may make the robot encounter a singular configuration,or even fail to complete the entire machining task due to unreachability.In addition to considering the two constraints of reachability and non-singularity,this paper also optimizes the robot base placement with stiffness as the goal to improve the machining quality.First of all,starting from the structure of the robot,the reachability and nonsingularity constraints are transformed into a simple geometric constraint imposed on the base placement:feasible base placement area.Then,genetic algorithm is used to search for the base placement with near optimal stiffness(near optimal base placement for short)in the feasible base placement area.Finally,multiple controlled experiments were carried out by taking the milling of a protuberance on the spacecraft cabin as an example.It is found that the calculated optimal base placement meets all the constraints and that the machining quality was indeed improved.In addition,compared with simple genetic algorithm,it is proved that the feasible base placement area method can shorten the running time of the whole program. | Zhongyang ZHANG Juliang XIAO Haitao LIU Tian HUANG | 2023 | Chinese Journal of Aeronautics2023，36，11： | 0 |
| 4 | Modeling and analysis for time-varying dynamics of thin-walled workpieces in mirror milling considering material removal显示文摘To reduce the vibration and deformation of large thin-walled workpieces during the milling process,mirror milling is widely used due to its point-to-point support and strong applicability.The influence of the support head on the workpiece’s dynamic characteristics is crucial in determining whether the mirror milling process is reliable and effective.Therefore,this study establishes a time-varying dynamic model for mirror milling of thin-walled workpieces with various boundary conditions to accurately analyze and predict the dynamic characteristics and response of the workpiece.First,a new analytical method for material removal with extensive applicability and high precision is proposed.In this method,the Ritz mode shape is used to approximate the workpiece’s mode shape as it changes during material removal.Next,the Hertz contact theory is adopted to establish a tool-workpiece-support head coupling model,which considers the jump-off phenomenon between them.Subsequently,the dynamic model is solved using the Newmark-β numerical integration method to obtain the workpiece’s time-domain acceleration and displacement responses under the forced vibration.Finally,the measured frequency response function(FRF)and vibration signals of workpieces verify the correctness of the proposed mirror milling model for thin-walled workpieces considering material removal.In addition,this paper analyzes the dynamic characteristics and forced vibration law of workpieces in mirror milling,which lays the foundation for high precision mirror milling. | MA ShiJun XIAO JuLiang LIU HaiTao LIU SiJiang TIAN Yu | 2023 | Science China(Technological Sciences)2023，66，7： | 0 |
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