摘要
为提高精密机床主轴回转精度 ,并进一步为主轴系统动态特性的改善及其优化设计提供理论依据 ,提出了带节流器的静压轴承自控系统动态品质的分析方法。通过对主轴力平衡条件和液体流量连续性方程的分析 ,推导出系统的非线性微分方程组 ,经 Taylor和 L aplace变换后 ,建立了系统的数学模型。通过对其传递函数的描述和动特性计算 ,得出了在外载荷变化情况下系统的过渡过程曲线和对数相频、幅频特性图像 (Bode图 )。利用自控系统稳定性理论对计算结果进行了综合分析 。
A new method to study the dynamic properties of hydrostatic bearing systems with throttling was presented to improve the accuracy of precision tools and to provide the theoretical basis for farther improving their dynamic properties and design. The method used nonlinear differential equations for the force balance on the spindle and for the liquid flow continuity equation which are solved using Taylor and Laplace transforms. Analysis of the transfer function and the dynamic characteristics gives images of the transient process and the logarithm phase amplitude characteristics with and without the external load. The results are then used to analyze the dynamic qualities of the system.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第5期80-83,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金项目!(59875046)
关键词
静压轴承
动特性
过渡过程
自控系统
精密机床
hydrostatic bearing
dynamic properties
transient process
logarithm phase amplitude characteristics
