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柔性臂约束/非约束模态降维模型精度分析
引用本文:赵宝山,赵志刚,王利平,张 刘,齐乃明.柔性臂约束/非约束模态降维模型精度分析[J].航天器环境工程,2012,29(3):287-291.
作者姓名:赵宝山  赵志刚  王利平  张 刘  齐乃明
作者单位:1. 哈尔滨工业大学航天学院,哈尔滨,150001
2. 天津航天机电设备研究所,天津,300300
3. 中国科学院长春光学精密机械与物理研究所,长春,130033
基金项目:国家自然科学基金资助项目,航天科技创新基金资助项目
摘    要:针对柔性机械臂约束、非约束模态降维的动力学绝对误差问题,可采用有限元法描述柔性变形,并应用拉格朗日法建立其动力学模型,分别利用约束和非约束模态进行降维,来比对两种降维方法的绝对精度.仿真结果表明:约束、非约束模态降维模型都具有较高的动力学精度,取相同阶数的非约束模态动力学精度更高,而约束模态的误差具有随时间累积的特点.

关 键 词:柔性机械臂  有限元法  动力学方程  约束模态  非约束模态  绝对误差
收稿时间:2012/2/17 0:00:00
修稿时间:2012/3/16 0:00:00

The precision analysis of constrained and unconstraint mode dimension reduction model for flexible manipulator
Zhao Baoshan,Zhao Zhigang,Wang Liping,Zhang Liu and Qi Naiming.The precision analysis of constrained and unconstraint mode dimension reduction model for flexible manipulator[J].Spacecraft Environment Engineering,2012,29(3):287-291.
Authors:Zhao Baoshan  Zhao Zhigang  Wang Liping  Zhang Liu and Qi Naiming
Institution:1(1.School of Astronautics,Harbin Institute of Technology,Harbin 150001,China;2.Tianjin Institute of Astronautics Electromechanical Device,Tianjin 300300,China;3.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)
Abstract:To study the precision of the constrained and unconstraint mode dimension reduction model for flexible manipulator,the finite element method is applied to describe the flexible deformation,the Lagrange method is used to establish the dynamical model;and then the dimension is reduced by the constrained and unconstrained mode method;in the end,the absolute errors of the two dimensional reduction method are analyzed.The simulation results show that both models have a good performance in the precision of dynamics.The unconstraint mode dynamic model has a higher precision when considering the same order,the absolute error of the constraint mode model has the nature of accumulation over time.
Keywords:flexible manipulator  finite element method  dynamics equations  constraint modal  unconstraint modal  absolute error
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