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Abstract: In order to eliminate the influence of the wheel vibration
on machining precision of the workpiece, a micropositioning workpiece
table with nanometer resolution is utilized to implement dynamic
compensation. In order to study the characteristics of the grinding
machine modulate with micropositioning table, the modal synthesis method
and Lagrange’s equation are utilized to establish the dynamic equation
of the intelligent grinding machine system. According to the fact, the
whole system is divided into three subsystems connected by two constrain
matrixes. Using the state-space method, the numerical solution is
obtained. Then the response of the system can be achieved using the
principle of modal superposition. Accordingly, the dynamic
characteristics of the system and machining precision before and after
compensation are analyzed. The simulation results show that the
machining accuracy of the workpiece can be effectively improved by
utilizing the micro-positioning workpiece table to implement dynamic
compensation.
Key words: Micro-positioning table Surface grinding machine
Dynamic modeling Modal synthesis
CLC No: TH113.1
国家自然科学基金资助项目(50275104).
Received 20040622, received in revised form 20041130
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