| Dynamics and Control of Grinding Machine with Micropositioning Workpiece Table |
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| 引用本文： | 田延岭 张大卫 闫兵. Dynamics and Control of Grinding Machine with Micropositioning Workpiece Table[J]. 天津大学学报(英文版), 2006, 12(3): 157-162 |
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| 作者姓名： | 田延岭 张大卫 闫兵 |
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| 作者单位： | School of Mechanical Engineering Tianjin University Tianjin 300072，China，School of Mechanical Engineering Tianjin University，Tianjin 300072，China，School of Mechanical Engineering Tianjin University of Technology and Education，Tianjin 300222 China |
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| 基金项目： | Supported by National Natural Science Foundation of China ( No. 50275104) . |
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| 摘 要： | To improve the machining precision of a surface grinding machine, a micropositioning workpiece table with high performance was used as auxiliary infeed mechanism to implement nanometer level positioning and dynamic compensation. To better understand the characteristics of the grinding machine modulated with micropositioning workpiece table, the dynamic model of the grinding system was established with modal synthesis and Lagrange's equation methods. The grinding system was divided into five subsystems. For each subsystem, the generalized kinematic and potential energies were obtained. Accordingly the dynamic model of the grinding system was given in the modal domain. The waviness of the grinding process was achieved based on the wheel and workpiece vibration. A nonlinear proportional integral derivative (PID) controller with differential trackers was developed to realize dynamic control. The simulation results show that the machining accuracy of the workpiece can be effectively improved by utilizing the micropositioning workpiece table to implement dynamic compensation. An experimental test was carried out to verify the proposed method, and the waviness of the workpiece can be reduced from 0.46 μm to 0.10 μm.
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| 关 键 词： | 表面研磨 磨床 动力学 微定位 非线性PID控制 |
| 收稿时间： | 2005-11-23 |
Dynamics and Control of Grinding Machine with Micropositioning Workpiece Table |
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| TIAN Yanling,ZHANG Dawei,YAN Bing. Dynamics and Control of Grinding Machine with Micropositioning Workpiece Table[J]. Transactions of Tianjin University, 2006, 12(3): 157-162 |
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| Authors: | TIAN Yanling ZHANG Dawei YAN Bing |
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| Abstract: | To improve the machining precision of a surface grinding machine, a micropositioning workpiece table with high performance was used as auxiliary infeed mechanism to implement nanometer level positioning and dynamic compensation.To better understand the characteristics of the grinding machine modulated with micropositioning workpiece table, the dynamic model of the grinding system was established with modal synthesis and Lagrange's equation methods.The grinding system was divided into five subsystems.For each subsystem, the generalized kinematic and potential energies were obtained.Accordingly the dynamic model of the grinding system was given in the modal domain.The waviness of the grinding process was achieved based on the wheel and workpiece vibration.A nonlinear proportional integral derivative (PID) controller with differential trackers was developed to realize dynamic control.The simulation results show that the machining accuracy of the workpiece can be effectively improved by utilizing the micropositioning workpiece table to implement dynamic compensation.An experimental test was carried out to verify the proposed method, and the waviness of the workpiece can be reduced from 0.46 μm to 0.10 μm. |
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| Keywords: | micropositioning workpiece table surface grinding dynamic modeling nonlinear PID controller |
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