固体火箭技术2016，Vol.39Issue(5)：678-684,7.DOI:10.7673/j.issn.1006-2793.2016.05.015
基于一次性机械设计理论的滚珠丝杠舵机结构优化设计方法
Structure optimization design method for ball screw actuator based on disposable mechanical elements design theory
摘要
Abstract
As the actuator of flight control system, its life ends with the completion of flight mission, so it belongs to the typical disposable mechanical elements. High power drive of actuator makes the contradiction between volume weight and carrying capacity more serious. By analyzing the failure mode of ball screw actuator sustaining heavy loading moment, the nut and fork are determined to be the critical components for improving the actuator carrying capacity. First, combining the disposable mechanical elements theo⁃ry, the finite element method is applied for calculating the four key factors which affect the nut carrying capacity. The simulation da⁃ta is highly consistent with the theoretical model and actual failure mode, and then the quantitative influence degree and the struc⁃ture optimization scheme are provided. Secondly, using statically indeterminate structure theory, the fork adopts statically indetermi⁃nate structure instead of the cantilever beam, which greatly increases its strength and stiffness under the condition of the same out⁃put characteristics. Then make clear that the shear and extrusion failure are the main failure mode of the fork, meanwhile, the strength calculation method is given. Finally, the structure optimization design method is applied to actuator development, by per⁃formance test, and over⁃all properties are satisfied, which proves that the structure optimization design method based on disposable mechanical elements design theory is efficient for ball screw actuator.关键词
一次性机械零件/滚珠丝杠舵机/结构优化设计Key words
disposable mechanical elements/ball screw actuator/structure optimization design分类
机械制造引用本文复制引用
张佼龙,周军,周凤岐..基于一次性机械设计理论的滚珠丝杠舵机结构优化设计方法[J].固体火箭技术,2016,39(5):678-684,7.基金项目
国家自然科学基金（61473226）。 （）
