| Novel approach for determining the optimal axial preload of a simulating rotary table spindle system |
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| 作者姓名： | SHAN Xiao-biao XIE Tao CHEN Wei-shan |
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| 作者单位： | School of Mechatronics Engineering，Harbin Institute of Technology，Harbin 15001，China |
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| 基金项目： | The experimental modal analysis described in the text was supported by the Control ＆ Simulation Center, Harbin Institute of Technology. |
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| 摘 要： | This paper presents a new theoretical model to determine the optimal axial preload of a spindle system, for challenging the traditional method which relies heavily on experience of engineers. The axial preloading stiffness was treated as the sum of the spindle modal stiffness and the framework elastic stiffness, based on a novel concept that magnitude of preloads can be controlled by measuring the resonant frequency of a spindle system. By employing an example of a certain type of aircraft simulating rotary table, the modal stiffness was measured on the Agilent 35670A Dynamic Signal Analyzer by experimental modal analysis. The equivalent elastic stiffness was simulated by both finite element analysis in ANSYS? and a curve fitting in MATLAB?. Results showed that the static preloading stiffness of the spindle was 7.2125×107 N/m, and that the optimal preloading force was 120.0848 N. Practical application proved the feasibility of our method.
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| 关 键 词： | 回转工作台 轴向位置预加负荷 优化 实验模型分析 模拟转台心轴系统 |
| 收稿时间： | 2006-07-18 |
| 修稿时间： | 2007-01-20 |
Novel approach for determining the optimal axial preload of a simulating rotary table spindle system |
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| SHAN Xiao-biao,XIE Tao,CHEN Wei-shan.Novel approach for determining the optimal axial preload of a simulating rotary table spindle system[J].Journal of Zhejiang University Science,2007,8(5):812-817. |
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| Authors: | Shan Xiao-biao Xie Tao Chen Wei-shan |
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| Institution: | (1) School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 15001, China |
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| Abstract: | This paper presents a new theoretical model to determine the optimal axial preload of a spindle system, for challenging the traditional method which relies heavily on experience of engineers. The axial preloading stiffness was treated as the sum of the spindle modal stiffness and the framework elastic stiffness, based on a novel concept that magnitude of preloads can be controlled by measuring the resonant frequency of a spindle system. By employing an example of a certain type of aircraft simulating rotary table, the modal stiffness was measured on the Agilent 35670A Dynamic Signal Analyzer by experimental modal analysis. The equivalent elastic stiffness was simulated by both finite element analysis in ANSYS® and a curve fitting in MATLAB®. Results showed that the static preloading stiffness of the spindle was 7.2125 × 107 N/m, and that the optimal preloading force was 120.0848 N. Practical application proved the feasibility of our method. |
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| Keywords: | Three-axis simulating rotary table Axial position preload Stiffness Experimental modal analysis Finite element analysis |
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