文献详情
Micro machine tool oriented optimum design of 3-RPS parallel mechanism with large titling and uniform deflecting capacities
文献类型期刊
作者Zhao, Gang[1];Deng, Yang[2];Xiao, Wenlei[3];Liu, Yazui[4]
机构
通讯作者Xiao, WL (reprint author), Beihang Univ, Sch Mech Engn & Automat, 37 Xueyuan Rd, Beijing 100191, Peoples R China.
来源信息年:2017  卷:11  期:3  
期刊信息JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING影响因子和分区  ISSN:1881-3054
关键词3-RPS parallel mechanism; Micro machine tool; Five-axis machining; Rotational capacity; Multiobjective optimization
增刊正刊
摘要Parallel kinematic mechanism has shown its advantages as a high-precision motion stage in a machine tool. In this paper, a RPS-XY hybrid kinematic structure TRIPOD actuated by linear ultrasonic motors is proposed and designed for a five-axis ultra-precision micro machine tool. In the designing stage, both the titling capacity and the consistency of the deflecting abilities in all directions need to be carefully designed to overcome the platform's limitation in the freeform surface machining. This study proposes an optimizer that can automatically search for a set of design parameters of the 3-RPS parallel part to generate large titling and uniform deflecting capacities simultaneously. A specified orientation workspace is calculated to evaluate the ability of rotation. Additionally, a new index is introduced to justify the uniform deflecting capacity. By evaluating those factors as the objective functions, a modified NSGA-II algorithm is employed for the optimum design with the consideration of discretely selected linear guides and spherical joints from a predefined database, which contains the abstracted engineering models of commercial products. Optimal results verify the feasibility and effectiveness of the proposed optimizer in designing a physical platform. The technique is extensible to most of other parallel mechanisms as a standard procedure.
收录情况SCIE(WOS:000412241500001)  EI(20174104268635)  
所属部门机械工程及自动化学院
DOI10.1299/jamdsm.2017jamdsm0035
百度学术Micro machine tool oriented optimum design of 3-RPS parallel mechanism with large titling and uniform deflecting capacities
语言外文
人气指数1220
浏览次数1220
基金National Natural Science Foundation of China [51505020]
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