| 导引头伺服机构的结构非线性动力学特性研究 |
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| 引用本文： | 罗自荣,范大鹏,尚建忠,杨政. 导引头伺服机构的结构非线性动力学特性研究[J]. 中国机械工程, 2010, 0(21) |
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| 作者姓名： | 罗自荣 范大鹏 尚建忠 杨政 |
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| 作者单位： | 国防科学技术大学; |
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| 基金项目： | 国家自然科学基金资助项目(50875257) |
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| 摘 要： | 基于Hertz接触理论,建立了表达角接触球轴承非线性刚度的二自由度矩阵模型;以导引头伺服机构为对象,建立了导引头陀螺装配结构六自由度非线性运动微分方程;借用经典数值算法的思想,提出了一种求解陀螺装配结构六自由度非线性运动微分方程的四阶Runge-Kutta算法,并对陀螺支架的非线性动力学特性进行了虚拟扫频分析。研究发现,由于角接触球轴承接触刚度的非线性,陀螺支架的谐振峰分布在扫频的所有频率范围(0～500Hz)内,而增大装配预紧力却可以提高陀螺装配结构的谐振频率,减少谐振峰的出现频次,故工程上可通过调节装配预紧力来抑制谐振峰值。
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| 关 键 词： | 导弹导引头 伺服机构 非线性动力学 角接触球轴承 |
Study on Nonlinear Dynamics of Seeker Servo Mechanism Structure |
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| Luo Zirong Fan Dapeng Shang Jianzhong Yang ZhengNational University of Defense Technology,Changsha. Study on Nonlinear Dynamics of Seeker Servo Mechanism Structure[J]. China Mechanical Engineering, 2010, 0(21) |
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| Authors: | Luo Zirong Fan Dapeng Shang Jianzhong Yang ZhengNational University of Defense Technology Changsha |
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| Affiliation: | Luo Zirong Fan Dapeng Shang Jianzhong Yang ZhengNational University of Defense Technology,Changsha,410073 |
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| Abstract: | Based on the contact theory of Hertz,a 2-D nonlinear stiffness matrix of angular contact ball bearing was calculated,and then a 6-D nonlinear dynamics equation of missile seeker servo mechanism assembly structure including both angular contact ball bearings and frame structure was established.According to the thought of the Runge-Kutaa algorithm for differential equation,a four-step Runge-Kutaa algorithm for solving the 6-D nonlinear dynamics equation was proposed.Finally,the algorithm was used to analyze t... |
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| Keywords: | missile seeker servo mechanism nonlinear dynamics angular contact ball bearing |
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